Colorado - Grand Canyon Waters Waters

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Colorado - Grand Canyon Waters Waters . orestry), with 3,740 14,870 Ephemeral Ephemeral 5 0 Colorado - Grand Canyon Watershed Assessments - 1 Watershed Colorado - Grand Canyon 260 13,415 Intermittent Non-perennial Intermittent Non-perennial 480 390 125 68,400 Additional Estimated Water Resources on Tribal Lands – Not Assessed Lands – Not on Tribal Resources Water Estimated Additional Perennial Perennial Perennial Perennial Estimated Surface Water Resources in the Colorado – Grand Canyon Watershed in the Colorado – Grand Canyon Resources SurfaceEstimated Water Lake acres Lake Stream miles Stream Lake acres Lake Stream miles Stream have been rounded to the nearest 5 miles or 5 acres. to been rounded have Ambient monitoring focuses on perennial waters; however, special investigations may identify water quality problems on quality problems identify water may special investigations however, on perennial waters; focuses Ambient monitoring and at 1:100,000 miles and acres are based on USGS digitized hydrology Estimated ephemeral waters. and even intermittent An estimate of surface water resources in the Colorado – Grand Canyon Watershed is provided in the following table in the following is provided Watershed in the Colorado – Grand Canyon resources of surfaceAn estimate water separately. those statistics are shown ADEQ; therefore, assessed by lands are not on Tribal Precipitation varies from 10-15 inches a year, including about 1 inch of snowfall per year in higher elevations. Excluding the Excluding in higher elevations. per year 1 inch of snowfall including about inches a year, 10-15 from Precipitation varies sparse. is Mead), surface and Lake water and its reservoirs Powell Colorado River (Lake Water Resources Water Elevations range from 1,000 feet (above sea level) along the Colorado River to 10,400 feet near Flagstaff. feet The majority of the 10,400 to the Colorado River along sea level) 1,000 range from (above feet Elevations aquatic communities with high desert flora, including coldwater fauna and elevation, 5,000-7,000 feet is between watershed exist. where perennial waters scattered mining districts. The Grand Canyon National Park, Kaibab National Forest, Lake Mead National Recreation Area, and Mead National Recreation Lake National Forest, Park, National Kaibab districts. The Grand Canyon mining scattered natural protect land uses to restricted and all have this watershed within Area are all located Recreation National Glen Canyon recreationists. and a large number of tourists lands also draw federal These resources. Land ownership is divided approximately as: 45% federal, 25% tribal, 15% private, and 5% state. Most of the 16,437 square Most of the 16,437 state. and 5% 25% tribal, 15% private, as: 45% federal, Land ownership divided approximately is The largest of 67,500 people (2000 census). population with an approximate sparsely are populated, miles in this watershed silviculture (f open grazing, recreation, and and Williams. Land use is primarily communities are Kingman spectacular incised canyons formed by erosion of sandstone formations, as well as volcanically formed mountains and high mountains and high formed as volcanically as well formations, sandstone of erosion by formed incised canyons spectacular plateaus. Watershed Description Watershed the Grand Canyon through Powell, Lake in Arizona at area, beginning drainage the Colorado River by is defined This watershed contains The watershed drainage. Little Colorado River include the It does not Mead. Dam at Lake Hoover National Park, to Colorado – Grand Canyon Watershed Canyon – Grand Colorado Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -2 Support” document. Support” map. Methods usedto Water complete theseassessmentsaredescribedinthe“Surface AssessmentMethods andTechnical waters assessedas“attaining”or“impaired”areillustratedThese drainageareasandthesurface onthefollowing watershed The Colorado–GrandCanyon Watershed canbeseparated into thefollowing drainageareasinArizona: Assessments 15010014 15010010 15010009 15010007 15010006 15010005 15010004 15010003 15010002 15010001 14070007 14070006 Detrital Wash Virgin River Fort Pearce Wash Red Lake Grand Wash Lake Mead Havasu Creek Kanab Creek Grand Canyon Marble Canyon Paria River Lake Powell Colorado - Grand Canyon Colorado - Grand Canyon Watershed Assessments - 3 Watershed Colorado - Grand Canyon Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -4 Colorado - Grand Canyon - - , pH, E. coli Inconclusive Purpose Ambient Category 3 Other Samples and lead samples to determine determine and lead samples to Designated use supportDesignated comments (2-3) Dissolved oxygen, oxygen, (2-3) Dissolved solids dissolved SSC, total E. coli 1 sample (binomial). oc A&Ww is attaining. This exceedance event. curred during a local storm FBC is inconclusive with 1 exceedance. with 1 exceedance. FBC is inconclusive occurred during a This exceedance Note: event. storm in with 1 exceedance FBC is inconclusive Colorado - Grand Canyon Watershed Assessments - 5 Watershed Colorado - Grand Canyon ADEQ Result 37 ug/L 37 2600 mg/L Sampling Agency , copper, lead , copper, 2000 cfu/100 mL 2000 cfu/100 E. coli Monitoring Recommendations Monitoring , lead DEQ # Nutrients & Related Samples Nutrients & Related 100449 (3) Ammonia, nitrite/nitrate, (3) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date Zinc (dissolved), dissolved oxygen, pH, cadmium (dissolved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), Mercury (dissolved) E. coli oxygen Dissolved Exceedances 3/9/2010 3/9/2010 3/9/2010 A&Ww - Inconclusive Site ID # Site CGBDW000.99 Use SupportUse 15 ug/L 80 mg/L Need seasonal coverage on all core parameters. Collect more on all core parameters. Need seasonal coverage FBC attainment. Applicable Standard 235 cfu/100 mL, SSM 235 cfu/100 Metal Samples Metal Utah border - Virgin River Utah border 15010010-009 9.6 Miles EAVER DAM WASH DAM EAVER FC - Inconclusive • FBC - Inconclusive • AGL - Inconclusive - Inconclusive • AGL • FBC - Inconclusive FC - Inconclusive Sampling period: 11/10/2009 - 4/27/2010 Sampling period: 11/10/2009 onitoring Summaryonitoring Low Site Name(s) Site Priority

SSC Lead

E. coli B

Parameter Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Missing Core Parameters Missing Seasonal Distribution Exceedances Needing More Samples to Assess to Needing More Samples Exceedances selenium, zinc (3) Antimony, arsenic, beryllium, cadmium, boron, (3) Antimony, lead, manganese, mercury, copper, chromium, BRIDGE IN LITTLEFIELD BELOW HIGHWAY 91 91 HIGHWAY BELOW Data Gaps and Monitoring Needs Data Gaps and Monitoring

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -6 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess selenium, zinc chromium, copper, lead,manganese,mercury, (2) Antimony, boron, cadmium, beryllium, arsenic, RANCH BELOW PHANTOM RANCH ABOVE PHANTOM B Priority Site Name(s) Low FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/16/2009 RIGHT ANGELCREEK 1.9 Miles 15010001-019 Phantom Creek-Colorado River Metal Samples Need seasonalcoverage onallcoreparameters. Use Support CGBRA000.44 CGBRA001.36 Site ID# No Exceedances Mercury (dissolved) Mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis None Kjeldahl nitrogen nitrogen, phosphorus,total (2) Ammonia,nitrite/nitrate, 100422 100423 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency ADEQ ADEQ SSC, total dissolved solids (1-2) Dissolved oxygen, Other Samples Category 3 Category Ambient Ambient Purpose Inconclusive E. coli , pH, - - Colorado - Grand Canyon - - , pH, E. coli Purpose Ambient Attaining some uses some Attaining Category 2 Other Samples Designated use supportDesignated comments (9-10) Dissolved oxygen, oxygen, Dissolved (9-10) solids, fluoride dissolved SSC, total ceedance on 6/5/2007 is unreliable - the ceedance on 6/5/2007 than the total fraction greater dissolved exceed (0.008 ug/L). Only 1 valid value ance during the assessment period. A&Wc is inconclusive. Low dissolved dissolved Low A&Wc is inconclusive. (binomial). in 2 of 9 samples oxygen The ex is inconclusive. A&Wc chronic Colorado - Grand Canyon Watershed Assessments - 7 Watershed Colorado - Grand Canyon USGS Result 6.5 mg/L 6.3 mg/L 0.011 ug/L 0.011 0.012 ug/L 0.012 Sampling Agency DEQ # Nutrients & Related Samples Nutrients & Related 100743 (10) Nitrite/nitrate, nitrogen, nitrogen, Nitrite/nitrate, (10) Kjeldahl phosphorus, total nitrogen Date None None None Dissolved oxygen, mercury (dissolved) oxygen, Dissolved Exceedances 3/6/2007 6/5/2007 12/4/2007 8/19/2008 Site ID # Site CGCLR698.93 Use SupportUse 7 mg/L 0.01 ug/L 0.01 Applicable Standard

Metal Samples Metal DWS - Inconclusive • FC - Attaining • FBC - Attaining - Attaining • FC - Inconclusive DWS Lake Powell - Paria River - Paria Powell Lake 14070006-001 Miles 16.3 AGI - Attaining • AGL - Attaining • A&Wc - Inconclusive • A&Wc - Attaining • AGL - Attaining AGI

OLORADO RIVER OLORADO d Sampling period: 8/8/2006 - 12/1/2008 onitoring Summaryonitoring

Site Name(s) Site

C oxygen

Mercury Dissolved Dissolved Parameter Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Exceedances Needing More Samples to Assess to Needing More Samples Exceedances Missing Core Parameters Missing Seasonal Distribution cadmium, chromium, copper, lead, manganese, copper, cadmium, chromium, selenium, zinc mercury, (10) Antimony, arsenic, barium, beryllium, boron, Antimony, (10) AT LEES FERRY, AZ LEES FERRY, AT USGS 09380000 Data Gaps and Monitoring Needs Data Gaps and Monitoring

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -8 Medium Priority conditions astheprevious exceedances hasbeendelisted. thisreach ance measuredinthelast6years anddatawere collected from thesamesite andundersimilarflow and 2011) indicate noevidence ofcontinuingseleniumproblems. Sincetherehave beennoexceed Reach was originallylisted for seleniumin2006,butnew data(20samplescollected between 2006 Collect additionaldissolved oxygen samplesdueto anddissolved mercury exceedances. Monitoring Recommendations - Colorado - Grand Canyon Impaired Purpose Ambient Category 5 Other Samples Designated use supportDesignated comments (9) Dissolved oxygen, pH, SSC, total pH, SSC, total oxygen, (9) Dissolved solids dissolved exclusions for storm events. storm for exclusions with 2 remains impaired A&Wc chronic These exceedances Note: exceedances. selenium results. are based on dissolved A&Wc remains impaired. All 9 single A&Wc remains impaired. All 9 single and no the standard samples exceeded Colorado - Grand Canyon Watershed Assessments - 9 Watershed Colorado - Grand Canyon USGS Result 2.1 ug/L 2.1 2.2 ug/L 78 mg/L 65 mg/L 172 mg/L 172 419 mg/L 419 264 mg/L 905 mg/L 933 mg/L 3310 mg/L 3310 2190 mg/L 2190 Sampling Agency DEQ # Nutrients & Related Samples Nutrients & Related 101483 (6-9) Nitrate, nitrite, nitrite/ nitrite, (6-9) Nitrate, phosphate, nitrogen, nitrate, Kjeldahl phosphorus, total nitrogen Date Exceedances 6/6/2007 2/1/2007 8/15/2007 4/26/2007 8/15/2007 3/15/2007 4/26/2007 8/31/2006 7/18/2007 11/7/2006 7/13/2006 - Status SSC and selenium (2004) SSC and selenium Site ID # Site CGCLR473.00 Impairment Impairment 2 ug/L 25 mg/L Applicable Standard Metal Samples Metal Parashant Canyon - Diamond Creek - Diamond Canyon Parashant 15010002-003 Miles 27.6 OLORADO RIVER OLORADO d AGI - Inconclusive • AGL - Inconclusive • A&Wc - Impaired • A&Wc - Inconclusive • AGL - Inconclusive AGI DWS - Inconclusive • FC - Inconclusive • FBC - Inconclusive - Inconclusive • FC - Inconclusive DWS Sampling period: 7/13/2006 - 8/15/2007 onitoring Summaryonitoring Site Name(s) Site

SSC C

Selenium Parameter (9 dissolved) Antimony, arsenic, barium, beryl Antimony, (9 dissolved) iron, copper, cadmium, chromium, lium, boron, zinc selenium, silver, lead, manganese, nickel, ABOVE DIAMOND CREEK DIAMOND CREEK ABOVE USGS 09404200

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -10 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess The reach remainsimpairedforThe reach seleniumandSSC. ADEQwillcoordinate development ofseleniumTMDLsalongtheColo Priority High rameters inneedofsamplenumberandseasonalcoverage. Collect samplesto development support ofsuspendedsedimentandseleniumTMDLs.Mostcorepa None nese, copper, lead E. coli nese, copper, lead E. coli None Impairment Discussion , nitrite/nitrate,chromium, lead,boron, fluoride,arsenic, manga , nitrite/nitrate,chromium, lead,boron, fluoride,arsenic, manga rado River. Monitoring Recommendations - - - - Colorado - Grand Canyon - - , pH, SSC, Inconclusive E. coli Purpose Ambient Category 3 Other Samples Designated use supportDesignated comments (1) Dissolved oxygen, oxygen, (1) Dissolved solids dissolved total FBC is inconclusive with 1 exceedance in with 1 exceedance FBC is inconclusive 1 sample (binomial). Colorado - Grand Canyon Watershed Assessments - 11 Watershed Colorado - Grand Canyon ADEQ Result 42 ug/L Sampling Agency E. coli E. coli Monitoring Recommendations Monitoring DEQ # Nutrients & Related Samples Nutrients & Related 100525 (1) Ammonia, nitrite/nitrate, (1) Ammonia, nitrite/nitrate, phosphorus, total nitrogen, Kjeldahl nitrogen Date Arsenic copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), Mercury (dissolved) Exceedances 10/18/2009 Site ID # Site CGCRY000.05 Use SupportUse 30 ug/L and seasonal coverage. Collect more arsenic samples to determine FBC attainment. All core parameters need sample number FBC attainment. All core parameters determine Collect more arsenic samples to Applicable Standard Metal Samples Metal Tributary at 361342 / 1121148 - Colorado River / 1121148 361342 at Tributary 15010002-018B Miles 9.1 RYSTAL CREEK RYSTAL Sampling period: 10/18/2009 onitoring Summaryonitoring FC - Inconclusive • FBC - Inconclusive • A&Ww - Inconclusive • FBC - Inconclusive FC - Inconclusive Site Name(s) Site Priority

Medium

C Arsenic

Parameter Missing Seasonal Distribution Enough Low Limits Not Lab Detection Exceedances Needing More Samples to Assess to Needing More Samples Exceedances Missing Core Parameters chromium, copper, lead, manganese, mercury, mercury, lead, manganese, copper, chromium, selenium, zinc (1) Antimony, arsenic, beryllium, cadmium, boron, (1) Antimony, ABOVE COLORADO COLORADO ABOVE RIVER Data Gaps and Monitoring Needs Data Gaps and Monitoring

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -12 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, RIVER ABOVE COLORADO D Priority Site Name(s) Low FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/20/2009 EER CREEK 4.9 Miles 15010002-019B Tributary at362616 /1122816 -ColoradoRiver Metal Samples No exceedances buttoo littleinformation to assess. Allcoreparameters needcoverage. Use Support CGDEE000.07 Site ID# No Exceedances Mercury (dissolved) Mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis None Kjeldahl nitrogen nitrogen, phosphorus,total (1) Ammonia,nitrite/nitrate, 100532 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency ADEQ total dissolved solids (1) Dissolved oxygen, Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,SSC, - - Colorado - Grand Canyon - - , pH, SSC, Inconclusive E. coli Purpose Ambient Category 3 Other Samples (1) Dissolved oxygen, oxygen, (1) Dissolved solids dissolved total Colorado - Grand Canyon Watershed Assessments - 13 Watershed Colorado - Grand Canyon ADEQ Sampling Agency E. coli E. coli Monitoring Recommendations Monitoring DEQ # Nutrients & Related Samples Nutrients & Related 100568 (1) Ammonia, nitrite/nitrate, (1) Ammonia, nitrite/nitrate, phosphorus, total nitrogen, Kjeldahl nitrogen None copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), Mercury (dissolved) No Exceedances Site ID # Site CGHAV000.36 Use SupportUse No exceedances but too little information to assess. All core parameters need coverage. assess. All core parameters to little information but too No exceedances Metal Samples Metal

Havasupi Reservation - Colorodo River - Colorodo Reservation Havasupi 15010004-001 3.3 Miles AVASU CREEK AVASU

Sampling period: 10/21/2009 Sampling period: 10/21/2009 onitoring Summaryonitoring FC - Inconclusive • FBC - Inconclusive • A&Ww - Inconclusive • FBC - Inconclusive FC - Inconclusive Low Site Name(s) Site

Priority

Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Missing Seasonal Distribution Exceedances Needing More Samples to Assess Needing More Samples to Exceedances Missing Core Parameters chromium, copper, lead, manganese, mercury, mercury, lead, manganese, copper, chromium, selenium, zinc (1) Antimony, arsenic, beryllium, cadmium, boron, (1) Antimony, ABOVE COLORADO COLORADO ABOVE RIVER USGS 09404115 Needs Data Gaps and Monitoring

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -14 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamples to Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, RIVER ABOVE COLORADO Parameter Selenium H Priority Site Name(s) Low FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/17/2009 ERMIT CREEK 3.5 Miles 15010002-020B Hermit Pack Trail crossing -ColoradoRiver Metal Samples Applicable Standard All coreparameters needsamplenumberandseasonalcoverage. 2 ug/L Use Support CGHRM000.08 Site ID# 10/17/2009 Exceedances Mercury (dissolved) Mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis None Date Kjeldahl nitrogen nitrogen, phosphorus,total (1) Ammonia,nitrite/nitrate, 100570 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency 2.2 ug/L Result ADEQ no anthropogenic activitiesthatcanlead tirely dueto naturalsources asthereare selenium concentrationisconsidereden A&Ww chronic isattaining.Elevated remote watershed. to seleniumcontaminationinthissmall total dissolved solids (1) Dissolved oxygen, Designated use support comments Designated usesupport Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,SSC, - - - Colorado - Grand Canyon - - , pH, SSC, Inconclusive E. coli Purpose Ambient Category 3 Other Samples Designated use supportDesignated comments (1) Dissolved oxygen, oxygen, (1) Dissolved solids, fluoride dissolved total A&Ww chronic is inconclusive. Only 1 is inconclusive. A&Ww chronic sample in the assessment period. , nitrite/nitrate, fluoride, arsenic, lead chromium, , nitrite/nitrate, fluoride, arsenic, lead chromium, , nitrite/nitrate, Colorado - Grand Canyon Watershed Assessments - 15 Watershed Colorado - Grand Canyon ADEQ Result 3.8 ug/L E. coli E. coli Sampling Agency Monitoring Recommendations Monitoring DEQ # Nutrients & Related Samples Nutrients & Related 100577 (1) Ammonia, nitrite/nitrate, (1) Ammonia, nitrite/nitrate, phosphorus, total nitrogen, Kjeldahl nitrogen Date Selenium copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), copper, solved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), copper, solved), Mercury (dissolved) Exceedances 10/20/2009 Site ID # Site CGKAN000.26 Use SupportUse 2 ug/L AGL - Inconclusive • A&Ww - Inconclusive • A&Ww - - Inconclusive AGL sample and seasonal coverage. sample and seasonal coverage. Collect additional selenium samples due to the exceedance. All core parameters need number of All core parameters the exceedance. Collect additional selenium samples due to Applicable Standard Metal Samples Metal Jump - up Canyon - Colorado River Canyon - up Jump 15010003-001 12.8 Miles ANAB CREEK ANAB DWS - Inconclusive • FC - Inconclusive • FBC - Inconclusive • FBC - Inconclusive - Inconclusive • FC - Inconclusive DWS Sampling period: 10/20/2009 onitoring Summaryonitoring Site Name(s) Site Priority

Medium

Selenium Parameter Missing Seasonal Distribution Enough Low Limits Not Lab Detection Exceedances Needing More Samples to Assess to Needing More Samples Exceedances Missing Core Parameters chromium, copper, lead, manganese, mercury, mercury, lead, manganese, copper, chromium, selenium, zinc (1) Antimony, arsenic, beryllium, cadmium, boron, (1) Antimony, ABOVE COLORADO COLORADO ABOVE RIVER Data Gaps and Monitoring Needs Data Gaps and Monitoring

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -16 (0) None AT WAHWEEP MARINA WAHWEAP RANDOM SITESNEAR CREEK ABOVE ANTELOPE NPS#2 AT BEACH EASTOF AT ANTELOPE MARINA Parameter L E. coli Site Name(s) onitoring Summary Sampling period:7/10/2006 -9/7/2006 DWS -Inconclusive •FC-Inconclusive •FBC-Inconclusive AKE POWELL 9770 Acres (inArizona) 14070006-1130 Metal Samples 235 cfu/100 mL,SSM Applicable Standard AGI -Inconclusive •AGL -Inconclusive Impairment CGPOW-WWMAR CGPOW-BEACH CGPOW-BYANT CGPOW-ANTEL CGPOW-RAND EPA infishtissue(2010) mercury Site ID# Status A&Wc -Inconclusive 7/11/2006 Exceedances Date (0) None 103938 102956 102972 105121 105116 Nutrients &Related Samples DEQ # 727 cfu/100 mL Sampling Agency Result NPS/USGS USGS NPS NPS NPS (7/2008 -6/2011). ceedance outsidetheanalysiswindow FBC isattaining.1singlesampleex VOCs chlorinated hydrocarbons, and other (14-16) Designated use support comments Designated usesupport E. coli Other Samples Special study Special study Special study Special study Special study Category 5 Category , petroleum products, Purpose Impaired - Colorado - Grand Canyon - - - Colorado - Grand Canyon Watershed Assessments - 17 Watershed Colorado - Grand Canyon problem is studied and monitored by the National Park the National Park by is studied and monitored problem , copper, nitrite/nitrate, fluoride, arsenic, fluoride, lead, chromium, nitrite/nitrate, , copper, E. coli E. coli Monitoring Recommendations Monitoring Impairment Discussion solved), copper, nitrite/nitrate, fluoride, arsenic, manga lead, chromium, nitrite/nitrate, copper, solved), nese, boron copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), manganese, boron None None (dis copper (dissolved), pH, cadmium oxygen, dissolved Zinc (dissolved), samples due to the exceedance. Collect core parameters to represent at least to parameters Collect core the exceedance. samples due to E. coli Collect additional assessment period. 3 seasons during an Service. Low Priority EPA overfile for mercury in fish tissue overfile EPA Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Missing Seasonal Distribution Missing Core Parameters Missing Core Exceedances Needing More Samples to Assess More Samples to Needing Exceedances Data Gaps and Monitoring Needs Monitoring and Gaps Data Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -18 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamples to Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, RIVER ABOVE COLORADO Parameter Dissolved Selenium oxygen M Site Name(s) FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/17/2009 3.5Miles 15010002-845 Headwaters -ColoradoRiver ONUMENT CREEK Metal Samples Applicable Standard 6.0 mg/L 2 ug/L Use Support CGMON000.19 Site ID# 10/17/2009 10/17/2009 Exceedances Mercury (dissolved) Mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis None Date Kjeldahl nitrogen nitrogen, phosphorus, total (1) Ammonia,nitrite/nitrate, 101434 Nutrients &Related Samples DEQ # E. coli E. coli Sampling Agency 4.73 mg/L 6.5 ug/L Result ADEQ selenium concentrationisconsidereden A&Ww chronic isattaining.Elevated due to low flow. A&Ww isattaining.Low dissolved oxygen remote watershed. to seleniumcontaminationinthissmall no anthropogenic activitiesthatcanlead tirely dueto naturalsources asthereare total dissolved solids (1) Dissolved oxygen, Designated use support comments Designated usesupport Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,SSC, - - - Colorado - Grand Canyon - Colorado - Grand Canyon Watershed Assessments - 19 Watershed Colorado - Grand Canyon Monitoring Recommendations Monitoring All core parameters need sample number and seasonal coverage. Use a lower detection limit for dis for limit detection Use a lower coverage. seasonal number and sample need parameters All core in 2005). mercurysolved exceedance A&W chronic (one Low Priority Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -20 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamples to Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, RIVER ABOVE COLORADO Parameter Selenium N Priority Site Name(s) Low FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/22/2009 ATIONAL CANYON CREEK 3.2 Miles 15010002-016 Headwaters -ColoradoRiver Metal Samples Applicable Standard Collect coreparameter samplesover threeseasonperiod. 2 ug/L Use Support CGNAT000.48 Site ID# 10/22/2009 Exceedances None solved), pH, Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis solved), pH, Zinc (dissolved), dissolved oxygen, pH,cadmium (dissolved), copper(dis None Date Kjeldahl nitrogen nitrogen, phosphorus,total (1) Ammonia,nitrite/nitrate, 100602 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency 4.6 ug/L Result ADEQ no anthropogenic activitiesthatcanlead tirely dueto naturalsources asthereare selenium concentrationisconsidereden A&Ww chronic isattaining.Elevated remote watershed. to seleniumcontaminationinthissmall dissolved solids (1) Dissolved oxygen, Designated use support comments Designated usesupport Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,total - - - Colorado - Grand Canyon , pH, Impaired E. coli Purpose Ambient Category 5 Other Samples Designated use supportDesignated comments (1-3) Dissolved oxygen, oxygen, (1-3) Dissolved solids, biocriteria dissolved SSC, total FBC is inconclusive. 1 exceedance in 3 1 exceedance FBC is inconclusive. samples (binomial). in 3 2 exceedances FBC is inconclusive. samples (binomial). A&Ww remains impaired (2004). Both storm occurred during local exceedances the from excluded and were events Insufficient determination. median value assess. number of samples left to A&Ww is inconclusive. FBC is inconclusive. 1 exceedance in 3 1 exceedance FBC is inconclusive. samples (binomial). Colorado - Grand Canyon Watershed Assessments - 21 Watershed Colorado - Grand Canyon ADEQ IBI 40 Result 34 ug/L 170 ug/L 170 160 ug/L 160 140 ug/L 140 7600 mg/L 7600 Sampling Agency 27500 mg/L 27500 DEQ # Nutrients & Related Samples Nutrients & Related 101073 (3) Ammonia, nitrite/nitrate, (3) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date Exceedances 2/9/2010 6/8/2010 2/9/2010 2/9/2010 3/30/2010 3/30/2010 3/30/2010 Status Site ID # Site E. coli (2006/8) and SSC (2004) E. coli (2006/8) CGPAR000.49 Impairment Impairment 30 ug/L 15 ug/L 80 mg/L 100 ug/L 100 IBI ≤ 39 violating IBI ≥ 50 attaining Applicable Standard IBI 40-49 inconclusive Metal Samples Metal FC - Attaining • FBC - Impaired • A&Ww - Impaired - Impaired • A&Ww • FBC FC - Attaining Utah border - Colorado River Utah border 14070007-123 29.4 Miles ARIA RIVER ARIA Sampling period: 2/9/2010 - 6/8/2010 Sampling period: 2/9/2010 onitoring Summaryonitoring Site Name(s) Site

SSC

Lead P Arsenic

Biocriteria Chromium Parameter chromium, copper, lead, manganese, mercury, lead, manganese, mercury, copper, chromium, selenium, zinc (3) Antimony, arsenic, beryllium, cadmium, boron, (3) Antimony, AT LEES FERRY, AZ LEES FERRY, AT

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -22 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess Reach remainsimpairedfor Priority High to verify thebioassessmentresult. nic, chromium, andleadsamplesdueto exceedances. Collectanadditionalmacroinvertebrate sample Collect additional E. coli (2006)andSuspendedSediment(2004).TMDLsfor theseparameters willbeinitiated in E. coli andsuspendedsedimentsamplesto TMDLdevelopment. support Collectarse Mercury (dissolved) Mercury E. coli E. coli chromium, lead, biocriteriaArsenic, Impairment Discussion Monitoring Recommendations 2014. - Colorado - Grand Canyon - - - , pH, SSC, Inconclusive E. coli Purpose Ambient Category 3 Other Samples Designated use supportDesignated comments (1) Dissolved oxygen, oxygen, (1) Dissolved solids dissolved total to selenium contamination in this small selenium contamination in this to watershed. remote A&Ww chronic is attaining. Elevated is attaining. Elevated A&Ww chronic en selenium concentration is considered as there are natural sources tirely due to lead activities that can no anthropogenic Colorado - Grand Canyon Watershed Assessments - 23 Watershed Colorado - Grand Canyon ADEQ Result 8.2 ug/L Sampling Agency E. coli E. coli Monitoring Recommendations Monitoring DEQ # Nutrients & Related Samples Nutrients & Related 100632 (1) Ammonia, nitrite/nitrate, (1) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date solved), solved), Mercury (dissolved) None copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), Exceedances 10/19/2009 Site ID # Site CGRYA000.05 Use SupportUse 2 ug/L All core parameters need sample number and seasonal coverage. All core parameters Applicable Standard Metal Samples Metal

Headwaters - Colorado River - Colorado Headwaters 15010002-871 Miles 5.1 OYAL ARCH CREEK ARCH OYAL

Sampling period: 10/19/2009 Sampling period: 10/19/2009 onitoring Summaryonitoring FC - Inconclusive • FBC - Inconclusive • A&Ww - Inconclusive • FBC - Inconclusive FC - Inconclusive Low Site Name(s) Site

Priority

Selenium Parameter Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Missing Seasonal Distribution Exceedances Needing More Samples to Assess to Needing More Samples Exceedances Missing Core Parameters chromium, copper, lead, manganese, mercury, lead, manganese, mercury, copper, chromium, selenium, zinc (1) Antimony, arsenic, beryllium, cadmium, boron, (1) Antimony, ABOVE COLORADO COLORADO ABOVE RIVER Needs Data Gaps and Monitoring

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -24 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, RIVER ABOVE COLORADO S Priority Site Name(s) Low FC -Inconclusive •FBC-Inconclusive •A&Ww-Inconclusive onitoring Summary Sampling period:10/18/2009 HINUMO CREEK 8.8 Miles 15010002-029B Tributary at361821 /1121803 -ColoradoRiver Metal Samples No exceedances buttoo littleinformation to assess. Allcoreparameters needcoverage. Use Support CGSHI000.05 Site ID# No Exceedances Mercury (dissolved) Mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis None phorus, total Kjeldahlnitrogen (1) Ammonia,nitrogen, phos 101436 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency ADEQ - total dissolved solids (1) Dissolved oxygen, Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,SSC, - - Colorado - Grand Canyon - - - , pH, SSC, Inconclusive E. coli Purpose Ambient Category 3 Other Samples Designated use supportDesignated comments (1) Dissolved oxygen, oxygen, (1) Dissolved solids dissolved total to selenium contamination in this small selenium contamination in this to watershed. remote A&Ww chronic is attaining. Elevated is attaining. Elevated A&Ww chronic en selenium concentration is considered as there are natural sources tirely due to lead activities that can no anthropogenic Colorado - Grand Canyon Watershed Assessments - 25 Watershed Colorado - Grand Canyon ADEQ Result 2.1 ug/L 2.1 Sampling Agency E. coli E. coli Monitoring Recommendations Monitoring DEQ # Nutrients & Related Samples Nutrients & Related 100648 (1) Ammonia, nitrite/nitrate, (1) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date solved), solved), Mercury (dissolved) None copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), copper (dis pH, cadmium (dissolved), oxygen, dissolved Zinc (dissolved), Exceedances 10/25/2009 Site ID # Site CGSPG000.17 Use SupportUse 2 ug/L All core parameters need sample number and seasonal coverage. All core parameters Applicable Standard Metal Samples Metal

Headwaters - Colorado River - Colorado Headwaters 15010002-318 6.0 Miles PRING CANYON CREEK CANYON PRING

Sampling period: 10/25/2009 onitoring Summaryonitoring FC - Inconclusive • FBC - Inconclusive • A&Ww - Inconclusive • FBC - Inconclusive FC - Inconclusive Low Site Name(s) Site

Priority

M Colorado - Grand Canyon M Colorado -GrandCanyon Watershed Assessments -26 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess selenium, zinc chromium, copper, lead,manganese,mercury, (1) Antimony, boron, cadmium, beryllium, arsenic, AT COLORADO RIVER T Priority Site Name(s) Low onitoring Summary FC -Inconclusive •FBC-Inconclusive •A&Wc-Inconclusive Sampling period:10/20/2009 APEATS CREEK 12.8 Miles 15010002-696 Headwaters -ColoradoRiver Metal Samples No exceedances buttoo littleinformation to assess. Allcoreparameters needcoverage. Use Support CGTAP000.08 Site ID# No Exceedances Cadmium (dissolved), mercury (dissolved)Cadmium (dissolved), mercury solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis solved), Zinc (dissolved), dissolved oxygen, pH,cadmium(dissolved), copper(dis None Kjeldahl nitrogen nitrogen, phosphorus,total (1) Ammonia,nitrite/nitrate, 100662 Nutrients &Related Samples DEQ # Monitoring Recommendations E. coli E. coli Sampling Agency ADEQ total dissolved solids (1) Dissolved oxygen, Other Samples Category 3 Category Ambient Purpose E. coli Inconclusive , pH,SSC, - - Colorado - Grand Canyon - - - , pH, E. coli Inconclusive Purpose Ambient Category 3 Other Samples Designated use supportDesignated comments (1-4) Dissolved oxygen, oxygen, (1-4) Dissolved solids, bottom dissolved SSC, total deposits A&Ww is inconclusive with only one event one event with only A&Ww is inconclusive on one day. at one site exceedances A&Ww is attaining. Both events. occurred during local storm one ex with only A&Ww is inconclusive ceedance during the assessment period. FBC is inconclusive. Only 1 single sample FBC is inconclusive. of moni in the last 3 years exceedance occurred This exceedance Note: toring. event. during a storm E. coli Colorado - Grand Canyon Watershed Assessments - 27 Watershed Colorado - Grand Canyon ADEQ 89% Result 2.1 ug/L 2.1 911 mg/L 911 1100 mg/L 1100 Sampling Agency , boron, manganese, copper, lead manganese, copper, , boron, 460 cfu/100 mL 460 cfu/100 E. coli DEQ # Nutrients & Related Samples Nutrients & Related 100679 (3) Ammonia, nitrite/nitrate, (3) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date Selenium, bottom deposits, Selenium, bottom oxygen Dissolved (dis copper cadmium (dissolved), oxygen, dissolved Zinc (dissolved), solved), Mercury (dissolved) Exceedances 3/9/2010 3/9/2010 4/27/2010 6/15/2010 11/9/2009 Site ID # Site CGVGR052.23 Use SupportUse 50% 2 ug/L 80 mg/L AGL - Inconclusive • A&Ww - Inconclusive • A&Ww - - Inconclusive AGL Applicable Standard 235 cfu/100 mL, SSM 235 cfu/100 Metal Samples Metal Black Rock Gulch - Sullivans Canyon - Sullivans Gulch Black Rock 15010010-006 Miles 10.3 IRGIN RIVER IRGIN FC - Inconclusive • FBC - Inconclusive • AGI - Inconclusive • AGI • FBC - Inconclusive FC - Inconclusive Sampling period: 11/9/2009 - 6/15/2010 onitoring Summaryonitoring Site Name(s) Site

SSC V E. coli Bottom Bottom

deposits Selenium Parameter Lab Detection Limits Not Low Enough Low Limits Not Lab Detection Exceedances Needing More Samples to Assess to Needing More Samples Exceedances Missing Core Parameters Missing Seasonal Distribution chromium, copper, lead, manganese, mercury, lead, manganese, mercury, copper, chromium, selenium, zinc (3) Antimony, arsenic, beryllium, cadmium, boron, (3) Antimony, AT I-15 REST STOP AT Data Gaps and Monitoring Needs Data Gaps and Monitoring

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -28 Medium Priority age onmostcoreparameters. Collect more E. coli , selenium,andbottom depositssamplesdueto exceedances. Needseasonalcover Monitoring Recommendations - Colorado - Grand Canyon - , pH, Impaired E. coli Purpose Ambient Ambient Category 5 Other Samples Designated use supportDesignated comments (3-5) Dissolved oxygen, oxygen, (3-5) Dissolved solids dissolved SSC, total toring. Note: This exceedance occurred This exceedance Note: toring. flow. during a storm exceedances A&Ww is impaired with two 1.3 samples, average times out of four 6-7 month period (see standard, over discussion). exceedances A&Ww is attaining. Both events. occurred during local storm FBC is inconclusive. Only 1 single sample FBC is inconclusive. of moni in the last 3 years exceedance Colorado - Grand Canyon Watershed Assessments - 29 Watershed Colorado - Grand Canyon ADEQ ADEQ Result 2.4 ug/L 2.9 ug/L 825 mg/L 982 mg/L Sampling Agency 346 cfu/100 mL 346 cfu/100 DEQ # Nutrients & Related Samples Nutrients & Related 101835 100680 Kjeldahl nitrogen (4) Ammonia, nitrite/nitrate, (4) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Date Exceedances 3/9/2010 3/9/2010 4/27/2010 6/16/2010 11/10/2009 Status Site ID # Site Add selenium to the 303(d) list. the to Add selenium CGVGR039.41 CGVGR044.58 AGL - Attaining • A&Ww - Impaired - Attaining AGL Impairment Impairment 2 ug/L 80 mg/L Applicable Standard 235 cfu/100 mL, SSM 235 cfu/100 Metal Samples Metal FC - Attaining • FBC - Inconclusive • AGI - Attaining AGI • - Inconclusive • FBC FC - Attaining Sullivans Canyon - Beaver Dam Wash - Beaver Canyon Sullivans 15010010-004 9.7 Miles IRGIN RIVER IRGIN Sampling period: 11/10/2009 - 6/16/2010 Sampling period: 11/10/2009 onitoring Summaryonitoring Site Name(s) Site

SSC V E. coli

Selenium Parameter (4) Antimony, arsenic, beryllium, cadmium, boron, (4) Antimony, lead, manganese, mercury, copper, chromium, selenium, zinc AT LITTLEFIELD, AZ AT MOUTH OF NARROWS AT

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -30 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess 2005 with switch from2005 withswitch dissolved to total 1977. after Largetimegapsbetween samples(1977-1994-2005) andnoseasonal Impaired for seleniumbutnot datato much assessoverall situation.Only6total and 17 dissolved seleniumvalues 1977- Priority High status andseleniumto development support ofTMDL. Good coreparameter coverage withsmallnumberofsamples.Collectmore distribution. Lastthreetotal Seratherhigh(two shown plus7.2 in2004). Mercury (dissolved) Mercury Dissolved oxygen None E. coli Impairment Discussion Monitoring Recommendations E. coli to determine FBC Colorado - Grand Canyon - , pH, Impaired E. coli Purpose Ambient Category 5 Other Samples Designated use supportDesignated comments (1-7) Dissolved oxygen, oxygen, (1-7) Dissolved solids, fluoride dissolved SSC, total FBC remains impaired. No new data FBC remains impaired. No new since last assessment. A&Ww remains impaired with 2 exceed ances. A&Ww remains impaired. Exceedances and 12/17/08 8/21/08, on 6/17/08, No new events. occurred during storm data since last assessment. AGI is inconclusive (binomial). is inconclusive AGI Colorado - Grand Canyon Watershed Assessments - 31 Watershed Colorado - Grand Canyon USGS Result 2.1 ug/L 2.1 ug/L 2.1 92 mg/L 746 mg/L 746 457 mg/L 457 mg/L 601 136 mg/L 1010 ug/L 1010 Sampling Agency 280 cfu/100 mL 280 cfu/100 1400 cfu/100 mL cfu/100 1400 1500 cfu/100 mL 1500 cfu/100 13000 cfu/100 mL 13000 cfu/100 DEQ # Nutrients & Related Samples Nutrients & Related 101836 (6) Ammonia, nitrite/nitrate, (6) Ammonia, nitrite/nitrate, total phosphorus, nitrogen, Kjeldahl nitrogen Date Exceedances 3/9/2007 6/17/2008 6/17/2008 6/17/2008 8/24/2006 8/21/2008 3/10/2008 9/29/2006 12/17/2008 12/17/2008 12/17/2008 12/20/2007 Status Site ID # Site CGVGR038.80 AGL - Inconclusive • A&Ww - Impaired • A&Ww - - Inconclusive AGL Impairment Impairment 2 ug/L 80 mg/L 1000 ug/L 1000 SSC and selenium (2004) and E. coli (2010) (2004) and SSC and selenium Applicable Standard 235 cfu/100 mL, SSM 235 cfu/100 Metal Samples Metal Beaver Dam Wash - Big Bend Wash Wash Dam Beaver 15010010-003 Miles 10.1 FC - Inconclusive • FBC - Impaired • AGI - Inconclusive • AGI • FBC - Impaired FC - Inconclusive IRGIN RIVER IRGIN d Sampling period: 8/24/2006 - 12/17/2008 Sampling period: 8/24/2006 d onitoring Summaryonitoring Site Name(s) Site

SSC V E. coli Boron

Selenium Parameter (6 dissolved) Arsenic, boron, iron, selenium Arsenic, iron, (6 dissolved) boron, USGS 09415000 AT LITTLEFIELD, AZ AT

M Colorado - Grand Canyon Colorado -GrandCanyon Watershed Assessments -32 Data GapsandMonitoring Needs Lab Detection LimitsNot Low Enough Missing SeasonalDistribution Missing CoreParameters Exceedances NeedingMoreSamplesto Assess Priority High Reach remainsimpairedfor SSC andselenium(2004) sons duringtheassessmentperiod. additional boron samplesdueto theexceedance. Collectcoreparameters to representatleast3sea Collect samplesto development support ofselenium,suspendedsediment,and N/A nese, copper, lead Zinc (dissolved), cadmium(dissolved), copper(dissolved), boron, manga nese, copper, lead Zinc (dissolved), cadmium(dissolved), copper(dissolved), boron, manga Boron Impairment Discussion Monitoring Recommendations E. coli (2010). Nonew datasincelastassessment. E. coli TMDLs.Collect - - -