WATER QUALITY TESTING SUMMARY
A DETAILED REVIEW OF THE TEST RESULTS FOR THE DRINKING WATER PRODUCED BY THE CARY/APEX WATER TREATMENT FACILITY 2020 JOHN CONLEY (Senior Laboratory Analyst) has been employed by the Town of Cary at the Cary/Apex Water Treatment Facility Laboratory since September 2001.
CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY
We are pleased to present to you the Cary/ If you have any questions or concerns regarding this Apex Water Treatment Facility Test Result report, please contact Rachel Monschein, Water System Summary for 2020. This report is a snapshot of last Laboratory Supervisor, at (919) 362-5507. year’s water quality. The values contained in this report In order to ensure that tap water is safe to drink, EPA are based on single measurements or yearly averages depending on the contaminant. The Environmental prescribes regulations that limit the amount of certain Protection Agency and/or the State requires us to contaminants in water provided by public water systems. monitor for certain substances less than once per year Drinking water, including bottled water, may reasonably because the concentrations of these substances are not be expected to contain at least small amounts of some expected to vary significantly from year to year. Some of contaminants. The presence of contaminants does not the data, though representative of the water quality, is necessarily indicate the water poses a health risk. To obtain more than one year old. In these cases, the most recent more information about contaminants and potential data is included, along with the year in which the sample health effects, call the EPA’s Safe Drinking Water Hotline was taken. It is our constant goal to provide you with a safe at (800) 426-4791. and dependable supply of drinking water.
2 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY IMPORTANT DRINKING WATER DEFINITIONS:
Action Level (AL) Locational Running Annual Average (LRAA) The concentration of a contaminant that, if exceeded, The average of sample analytical results for triggers treatment or other requirements which a water samples taken at a particular monitoring system must follow. location during the previous four calendar quarters under the Stage 2 Disinfectants and Amount Detected Disinfection Byproducts Rule. The annual average value, not the maximum value, for the parameter listed. EPA requires that maximum Microsiemens per centimeter (µS/cm) amounts detected be reported in the Annual Water A measure of the conductivity of water. Quality Report (CCR). Million Fibers per Liter (MF/L) Maximum Contaminant Level (MCL) A measure of the presence of asbestos fibers that are The highest level of a contaminant that is allowed in longer than 10 micrometers. drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology. Nephelometric Turbidity Unit (NTU) A measure of the clarity or turbidity of water. Note: MCLs are set at very stringent levels. To understand the possible health effects described for Not Applicable (N/A) many regulated constituents, a person would have to Information not applicable or not required. drink two liters of water every day at the MCL level for a Non-Detects (ND) lifetime to have a one-in-a-million chance of having the The contaminant is not present at the level of detection described health effect. set for the particular method used. Maximum Contaminant Level Goal (MCLG) Parts Per Billion (ppb) or Micrograms The level of a contaminant in drinking water below which Per Liter (µg/L) there is no known or expected risk to health. MCLGs allow One part substance per billion parts water. for a margin of safety. Parts Per Million (ppm) or Milligrams Maximum Residual Disinfection Level (MRDL) Per Liter (mg/L) The highest level of a disinfectant allowed in drinking One part substance per million parts water. water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial Parts Per Trillion (ppt) or Nanograms contaminants. Per Liter (nanograms/L) One part substance per trillion parts water. Maximum Residual Disinfection Level Goal (MRDLG) Picocuries Per Liter (pCi/L) The level of a drinking water disinfectant below which A measure of the radioactivity in water. there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to Running Annual Average (RAA) control microbial contaminants. Compliance calculations based on a running annual average of reported values. Method Reporting Limit (MRL) The lowest reportable concentration set for the particular Standard Units (SU) method used. A measure of the pH of water. Treatment Technique (TT) A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.
3 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY LEAD AND COPPER
SITES CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT ABOVE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED AL/TOTAL Y/N SITES
Corrosion of household plumbing Copper (ppm) AL = 1.3 1.3 0.121 0/60 systems; erosion of natural deposits; (90th percentile) 60 samples 2018 once every N leaching from wood preservatives Lead (ppb) 3 years Corrosion of household plumbing AL = 15 0 <0.003 0/60 (90th percentile) systems, erosion of natural deposits
NITRATE AND NITRITE
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT RANGE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED DETECTED Y/N
Runoff from fertilizer use; leaching Nitrate (as Nitrogen) 10 10 <1 from septic tanks, sewage; erosion of (ppm) 2 times natural deposits 2020 N/A N a week Runoff from fertilizer use; leaching Nitrite (as Nitrogen) 1 1 <0.01 from septic tanks, sewage; erosion of (ppm) natural deposits
ASBESTOS
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT RANGE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED DETECTED Y/N
Once every Decay of asbestos cement water mains; Total Asbestos (MF/L) 2020 7 7 < 0.19 N/A N 9 years erosion of natural deposits
DISINFECTANTS AND DISINFECTION BYPRODUCTS
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT RANGE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED DETECTED Y/N
40 26 – 47 TTHM (ppb) 8 samples By-product of drinking water 80 N/A (Maximum (individual [Total Trihalomethanes] quarterly chlorination LRAA) sample sites)
16 10– 21 HAA5 (ppb) 8 samples By-product of drinking water 60 N/A (Maximum (individual [Total Haloacetic Acids] quarterly disinfection LRAA) sample sites)
8 10 1 – 4 Once a (running By-product of drinking water Bromate (ppb) (running annual 0 (individual month annual disinfection average) measurements) average) 2020 N 127 samples 3.05 MRDL = 4 1.23– 3.96 a month (running Water additive used to control Chloramines (ppm) (running annual MRDLG = 4 (individual except for annual microbes average) sites) March average)
2.05 MRDL = 4 0.67– 2.91 127 samples (running Water additive used to control Chlorine, Free (ppm) (running annual MRDLG = 4 (individual in March annual microbes average) sites) average)
Total Organic Carbon Weekly TT N/A 1.62 1.32 – 1.92 Naturally present in the environment (removal ratio)
4 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY TURBIDITY (COMBINED FILTER EFFLUENT TURBIDITY VALUES)
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT RANGE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED DETECTED Y/N
0.09 and TT = 1 NTU and Turbidity (NTU) 2020 Every 4 hours N/A 100% < 0.02 – 0.09 N Soil runoff 95% <0.3 NTU 0.3% NTU
Note: Compliance with the MCL for turbidity is based on the combined filter effluent turbidity values, not the finished water turbidity values.
RADIOLOGICALS
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED Y/N
Gross Alpha (pCi/L) 15 < 3 Erosion of natural deposits
Decay of natural and Gross Beta (pCi/L) 50 4.2 man-made deposits Once every 2017 0 N Radium 226 (pCi/L) 9 years 3 < 1 Erosion of natural deposits
Radium 228 (pCi/L) 2 < 1 Erosion of natural deposits
Uranium (pCi/L) 20.1 < 0.67 Erosion of natural deposits
MICROBIOLOGICALS
CONTAMINANT YEAR TEST HIGHEST LEVEL ALLOWED HIGHEST LEVEL AMOUNT VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY (MCL) GOAL (MCLG) DETECTED Y/N
TT = If greater than 5% of monthly samples Total Coliform Bacteria 127 samples Naturally present in 2020 are positive in one month, an assessment N/A 0.77% N/A (presence or absence) a month the environment is required.
0 (Note: Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take Fecal Coliform or E. coli 127 samples Human and animal 2020 repeat samples following E. coli-positive 0 0 N (presence or absence) a month fecal waste routine sample or system fails to analyze total coliform-positive repeat sample for E. coli.)
Cryptosporidium Human and animal 2020 Once TT = 99 % removal 0 <0.010 N (oocysts/L) fecal waste
Giardia lamblia Human and animal 2020 Once TT = 99 % removal/inactivation 0 <0.010 N (cysts/L) fecal waste
TRIHALOMETHANES (THMs)
CONTAMINANT YEAR AMOUNT VIOLATION TEST FREQUENCY RANGE DETECTED TYPICAL SOURCE (UNITS) SAMPLED DETECTED Y/N
Chloroform (ppb) 12.7 6.6 – 21.0
Bromodichloromethane (ppb) 8 samples 13.6 9.9– 16 2020 N By-product of drinking water chlorination Bromoform (ppb) quarterly 1.6 1.0 – 2.6
Chlorodibromomethane (ppb) 9.7 7.5 – 11.0
Note: Not individually regulated.
5 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY HALOACETIC ACIDS (HAAs)
CONTAMINANT YEAR AMOUNT VIOLATION TEST FREQUENCY RANGE DETECTED TYPICAL SOURCE (UNITS) SAMPLED DETECTED Y/N
Trichloroacetic Acid (ppb) 3.0 1.6 – 5.7
Dichloroacetic Acid (ppb) 8.7 6.2 – 13 8 samples Monochloroacetic Acid (ppb) 2020 <2.0 No range N By-product of drinking water chlorination quarterly Monobromoacetic Acid (ppb) <1.0 <1 - 1.9
Dibromoacetic Acid (ppb) 2.3 1.4– 3.7
Note: Not individually regulated.
REGULATED INORGANICS
CONTAMINANT YEAR TEST HIGHEST LEVEL HIGHEST LEVEL AMOUNT RANGE VIOLATION TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) GOAL (MCLG) DETECTED DETECTED Y/N
Discharge from petroleum refineries; fire Antimony (ppb) 6 6 < 3 retardants; ceramics; electronics; solder
Erosion of natural deposits; runoff from Arsenic (ppb) 10 0 < 5 orchards; runoff from glass and electronics production wastes
Discharge of drilling wastes; discharge from Barium (ppm) 2 2 < 0.4 metal refineries; erosion of natural deposits Daily Discharge from metal refineries and coal- No Beryllium (ppb) 4 4 < 2 burning factories; discharge from electrical, range aerospace, and defense industries
Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal Cadmium (ppb) 5 5 < 1 refineries; runoff from waste batteries and paints
2020 N Discharge from steel and pulp mills; erosion Chromium (ppb) 100 100 < 20 of natural deposits
Cyanide, Total Discharge from steel/metal factories; 2x Annually 200 200 < 50 (ppb) discharge from plastic and fertilizer factories
Erosion of natural deposits; water additive Daily Fluoride (ppm) 4 4 0.60 <0.1 – 0.97 which promotes strong teeth; discharge from fertilizer and aluminum factories
Erosion of natural deposits; discharge from Mercury 2x Annually 2 2 < 0.4 refineries and factories; runoff from landfills; (inorganic) (ppb) runoff from cropland
No Discharge from petroleum and metal Selenium (ppb) 50 50 < 10 range refineries; erosion of natural deposits; Daily discharge from mines
Leaching from ore-processing sites; discharge Thallium (ppb) 2 0.5 < 1 from electronics, glass, and drug factories
6 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY ERIN LEE (Senior Laboratory Analyst) has been employed by the Town of Cary at the Cary/Apex Water Treatment Facility Laboratory since October 2005.
WATER QUALITY CHARACTERISTICS
CONTAMINANT YEAR TEST HIGHEST LEVEL AMOUNT RANGE VIOLATION (UNITS) SAMPLED FREQUENCY ALLOWED (SMCL) DETECTED DETECTED Y/N
Alkalinity, Total, as CaCO3 (ppm) Daily N/A 35 25 – 42
Aluminum (ppm) Daily 0.20 0.03 <0.02 – 0.07
Ammonia, Free (ppm) Daily N/A 0.11 0 – 0.28
Ammonia, Total (ppm) Daily N/A 0.95 0.00 – 1.11
Calcium (ppm) Daily N/A 8.54 6.81 – 10.25
Carbon Dioxide (ppm) Daily N/A 1.50 0.86 – 4.28
Chloride (ppm) Weekly 250 17.6 11.6 – 21.2
Color (CU) Daily 15 0 0 – 2
Conductivity (uS/cm) Daily N/A 221 121– 264 2020 Geosmin (ppt) Daily N/A <1 <1 – 6.40
Classified as Hardness, Total, as CaCO3 (ppm) Daily 33 27 – 39 “moderately soft”
Hardness, Total, as CaCO3 Classified as N Daily 1.9 1 .6 – 2.3 (grains per gallon) “moderately soft”
Iron (ppm) Daily 0.3 <0.06 No range
Magnesium (ppm) Daily N/A 2.75 2.35– 3.34 Manganese (ppm) Daily 0.05 0.01 <0.01 – 0.03
Methylisoborneol (MIB) (ppt) Daily N/A <1 <1 – 4.82 Nickel (ppm) Daily N/A <0.1 No range
Ortho-Phosphate as PO4 (ppm) Weekly N/A 0.62 <0.05 – 0.71
pH (SU) Daily 6.5 to 8.5 7.75 7.23 – 8.12
Silica (ppm) 2004 Once N/A 3.44 <1.00 – 7.16
Sodium (ppm) 2x Annually N/A 31.7 29.4 – 34.0
Sulfate (ppm) 2020 2x Annually 250 37 35 – 39 Total Phosphorous as P (ppm) Weekly N/A 0.23 <0.05 – 0.28
Total Dissolved Solids (ppm) 2013 Weekly 500 119 103 – 140 Zinc (ppm) 2007 Once 5 <0.005 No range
7 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY SYNTHETIC ORGANIC CHEMICALS (SOCs) INCLUDING PESTICIDES AND HERBICIDES (NOTE: All results are below detection limit)
HIGHEST HIGHEST CONTAMINANT YEAR TEST LEVEL AMOUNT RANGE VIOLATION LEVEL GOAL TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED DETECTED DETECTED Y/N (MCLG) (MCL)
2,4-D (ppb) 70 70 < 0.1 Runoff from herbicide used on row crops
2,4,5-TP (Silvex) (ppb) 50 50 < 0.2 Residue of banned herbicide
Alachlor (ppb) 2 0 < 0.2 Runoff from herbicide used on row crops
Atrazine (ppb) 3 3 < 0.1 Runoff from herbicide used on row crops
Leaching from linings of water storage tanks Benzo(a)pyrene (PAH) (ppt) 200 0 < 20 and distribution lines
Leaching of soil fumigant used on rice Carbofuran (ppb) 40 40 < 0.9 and alfalfa
Chlordane (ppb) 2 0 < 0.2 Residue of banned termiticide
Dalapon (ppb) 200 200 <1 Runoff from herbicide used on rights of way
Bis(2-ethylhexyl)adipate (ppb) 400 400 < 0.6 Discharge from chemical factories
Bis(2-ethylhexyl)phthalate Discharge from rubber and chemical 6 0 < 1.32 (ppb) factories
1,2-Dibromo-3-chloropropane Runoff/leaching from soil fumigant used on 200 0 < 20 (DBCP) (ppt) soybeans, cotton, pineapples, and orchards
Runoff from herbicide used on soybeans Dinoseb (ppb) 7 7 < 0.2 and vegetables
Endrin (ppb) 2 2 < 0.01 Residue of banned insecticide No 2020 2x Annually N Ethylene dibromide (EDB) range (ppt); also known as 50 0 < 10 Discharge from petroleum refineries 1,2-Dibromoethane
Heptachlor (ppt) 400 0 < 40 Residue of banned pesticide
Heptachlor epoxide (ppt) 200 0 < 20 Breakdown of heptachlor
Discharge from metal refineries and Hexachlorobenzene (ppb) 1 0 < 0.1 agricultural chemical factories
Hexachlorocyclopentadiene 50 50 < 0.1 Discharge from chemical factories (ppb)
Lindane (ppt); also known as Runoff/leaching from insecticide used on 200 200 < 20 gamma-BHC cattle, lumber, gardens
Runoff/leaching from insecticide used on Methoxychlor (ppb) 40 40 < 0.1 fruits, vegetables, alfalfa, livestock
Runoff/leaching from insecticide used on Oxamyl(vydate) (ppb) 200 200 < 2 apples, potatoes and tomatoes
Polychlorinated biphenyls Runoff from landfills; discharge of 500 0 < 100 (PCBs) (ppt) waste chemicals
Pentachlorophenol (ppb) 1 0 < 0.04 Discharge from wood preserving factories
Picloram (ppb) 500 500 < 0.1 Herbicide runoff
Simazine (ppb) 4 4 < 0.07 Herbicide runoff
Runoff/leaching from insecticide used on Toxaphene (ppb) 3 0 < 1 cotton and cattle
8 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED SOCs INCLUDING PESTICIDES AND HERBICIDES (NOTE: All results are below detection limit)
CONTAMINANT YEAR TEST AMOUNT RANGE VIOLATION (UNITS) SAMPLED FREQUENCY DETECTED DETECTED Y/N Aldicarb (ppb) < 0.5
Aldicarb Sulfone (ppb) 2020 < 0.8 Aldicarb Sulfoxide (ppb) < 0.5
Aldrin (ppb) 2015 < 0.2
Butachlor (ppb) < 8 Carbaryl (ppb) 2020 < 4 No 2x Annually N Dicamba (ppb) < 1 range
Dieldrin (ppb) 2015 < 0.2
3-Hydroxycarbofuran (ppb) < 4
Methomyl (ppb) < 4
Metolachlor (ppb) 2020 < 0.8 Metribuzin (ppb) < 0.8
Propachlor (ppb) < 6
DAVID BROOKS (Water System Quality Compliance Technician) PATRICK BRUEN (Water System Quality Compliance Technician) has been employed by the Town of Cary since October 2006. has been employed by the Town of Cary since November 2002.
9 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY VOLATILE ORGANIC CHEMICALS (VOCs) HIGHEST CONTAMINANT YEAR TEST HIGHEST LEVEL AMOUNT RANGE VIOLATION LEVEL GOAL TYPICAL SOURCE (UNITS) SAMPLED FREQUENCY ALLOWED (MCL) DETECTED DETECTED Y/N (MCLG)
Runoff from herbicide used on Benzene (ppb) 5 0 < 0.5 row crops
Carbon tetrachloride (ppb) 5 0 < 0.5 Residue of banned herbicide
Runoff from herbicide used on Chlorobenzene (ppb) 100 100 < 0.5 row crops
1,2 - Dichlorobenzene (ppb) Runoff from herbicide used on 600 600 < 0.5 (o - Dichlorobenzene) row crops
1,4 - Dichlorobenzene (ppb) Leaching from linings of water 75 75 < 0.5 (p - Dichlorobenzene) storage tanks and distribution lines
Leaching of soil fumigant used on 1,2 – Dichloroethane (ppb) 5 0 < 0.5 rice and alfalfa
1,1 – Dichloroethene (ppb) 7 7 < 0.5 Residue of banned termiticide
cis - 1,2 - Dichloroethene (ppb) Runoff from herbicide used on 70 70 < 0.5 (cis-1,2 -Dichloroethylene) rights of way
trans-1,2 -Dichloroethene (ppb) 100 100 < 0.5 Discharge from chemical factories (trans-1,2-Dichloroethylene)
Discharge from rubber and 1,2 - Dichloropropane (ppb) 5 0 < 0.5 chemical factories
No Runoff/leaching from soil fumigant 2020 Annually N Ethylbenzene (ppb) 700 700 < 0.5 range used on soybeans, cotton, pineapples, and orchards
Methylene chloride (ppb) Runoff from herbicide used on 5 0 < 0.5 (Dichloromethane) soybeans and vegetables
Styrene (ppb) 100 100 < 0.5 Residue of banned insecticide
Tetrachloroethene (ppb) 5 0 < 0.5 Discharge from petroleum refineries
1,2,4 –Trichlorobenzene (ppb) 70 70 < 0.5 Residue of banned pesticide
1,1,1 – Trichloroethane (ppb) 200 200 < 0.5 Breakdown of heptachlor
Discharge from metal refineries and 1,1,2 –Trichloroethane (ppb) 5 3 < 0.5 agricultural chemical factories
Trichloroethene (ppb) 5 0 < 0.5 Discharge from chemical factories
Runoff/leaching from insecticide Toluene (ppm) 1 1 < 0.0005 used on cattle, lumber, gardens
Runoff/leaching from insecticide Vinyl chloride (ppb) 2 0 < 0.5 used on fruits, vegetables, alfalfa, livestock
Runoff/leaching from insecticide Xylenes, Total (ppm) 10 10 < 0.0005 used on apples, potatoes and tomatoes
10 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED VOCs CONTAMINANT YEAR TEST AMOUNT RANGE VIOLATION (UNITS) SAMPLED FREQUENCY DETECTED DETECTED Y/N
Bromobenzene (ppb) < 0.5
Bromochloromethane (ppb) < 0.5
Bromomethane (ppb) < 0.5
n-Butylbenzene (ppb) < 0.5
Sec-Butylbenzene (ppb) < 0.5
Tert-Butylbenzene (ppb) < 0.5
Chloroethane (ppb) < 0.5
Chloromethane (ppb) < 0.5
2 - Chlorotoluene (ppb) < 0.5
4 - Chlorotoluene (ppb) < 0.5
Dibromomethane (ppb) < 0.5
1,3 - Dichlorobenzene (ppb); < 0.5 (meta-Dichlorobenzene)
Dichlorodifluoromethane (ppb) < 0.5
1,1 - Dichloroethane (ppb) < 0.5
1,3 - Dichloropropane (ppb) < 0.5 No 2,2 - Dichloropropane (ppb) 2020 Annually < 0.5 N range 1,1 - Dichloropropene (ppb) < 0.5
1,3 - Dichloropropene (ppb) < 0.5
Hexachlorobutadiene (ppb) < 0.5
Isopropylbenzene (ppb) < 0.5
4 - Isopropyltoluene (ppb) < 0.5
Methyl-tert-butyl ether (MTBE) (ppb) < 0.5
Naphthalene (ppb) < 0.5
n-Propylbenzene (ppb) < 0.5
1,1,1,2 - Tetrachloroethane (ppb) < 0.5
1,1,2,2 - Tetrachloroethane (ppb) < 0.5
1,2,3 - Trichlorobenzene (ppb) < 0.5
1,2,3 - Trichloropropane (ppb) < 0.5
Trichlorofluoromethane (ppb); < 0.5 (Fluorotrichloromethane)
1,2,4 - Trimethylbenzene (ppb) < 0.5
1,3,5 - Trimethylbenzene (ppb) < 0.5
trans - 1,3 - Dichloropropylene (ppb) < 0.5
1,2,4 - Trimethylbenzene (ppb) < 0.5
1,3,5 - Trimethylbenzene (ppb) < 0.5
11 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS)
AVERAGE YEAR TEST RANGE VIOLATION AMOUNT SOURCE SAMPLED FREQUENCY DETECTED Y/N DETECTED
10:2 Fluorotelomer sulfonic acid (10:2 FTS) (ng/L) <2 No Range
4:2 Fluorotelomer sulfonic acid (4:2 FTS) (ng/L) <2 No Range
6:2 Fluorotelomer sulfonic acid (6:2 FTS) (ng/L) <2 No Range
8:2 Fluorotelomer sulfonic acid (8:2 FTS) (ng/L) <2 No Range
ADONA (ng/L) <2 No Range
F-53B Major (ng/L) <2 No Range
F-53B Minor (ng/L) <2 No Range
GenX (ng/L) <5 No Range
N-ethylperfluorooctane sulfonamide (NEtFOSA) (ng/L) <2 No Range
N-ethylperfluorooctane sulfonamidoethanol (ng/L) <2 No Range Man-made chemicals used for waterproof and stain proof fabrics, N-methylperfluorooctane sulfonamide (NMeFOSA) (ng/L) 2020 4 times <2 No Range N nonstick cookware, some food packaging materials, and fire N-methylperfluorooctane sulfonamidoethanol (ng/L) <2 No Range suppression foams. Perfluorobutanesulfonic acid (PFBS) (ng/L) 3.3 2.8- 4.0
Perfluorobutanoic acid (PFBA) (ng/L) 9.6 8.2 - 11
Perfluorodecanoic acid (PFDA) (ng/L) <2 No Range
Perfluoroheptanoic acid (PFHpA) (ng/L) 5.2 3.1 - 8.0
Perfluorohexanesulfonic acid (PFHxS) (ng/L) <2 No Range
Perfluorohexanoic acid (PFHxA) (ng/L) 10.9 7.8- 15
Perfluorolauric acid (PFDoA) (ng/L) <2 No Range
Perfluorononanoic acid (PFNA) (ng/L) <2 No Range
Perfluorooctane sulfonate (PFOS) (ng/L) <2 <2 - 2.3
N-ethyl Perfluorooctanesulfonamidoacetic acid <2 No Range (NEtFO5S3A7A) (ng/L)
12 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) (continued)
AVERAGE YEAR TEST RANGE VIOLATION AMOUNT SOURCE SAMPLED FREQUENCY DETECTED Y/N DETECTED N-methyl Perfluorooctanesulfonamidoacetic acid <2 No Range (NMe5F3O7SAA (ng/L)
Perfluorooctanoic acid (PFOA) (ng/L) 3.7 3.2 – 4.4
Perfluorotridecanoic acid (PFTrDA) (ng/L) <2
Perfluoroundecanoic acid (PFUnA) (ng/L) <2
Perfluorododecanesulfonic acid (PFDoS) (ng/L) <2
Perfluorodecanesulfonic acid (PFDS) (ng/L) <2
Perfluoroheptanesulfonic acid (PFHpS) (ng/L) <2 Man-made chemicals used for waterproof and stain proof fabrics, Perfluorohexadecanoic acid (PFHxDA) (ng/L) 2020 4 times <2 No Range N nonstick cookware, some food packaging materials, and fire Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) (ng/L) <5 suppression foams. Perfluoro-4-isopropoxybutanoic acid (ng/L) <5 Perfluoro-4-methoxybutanoic acid (PFMOBA) (ng/L) <5
Perfluoro-3-methoxypropanoic acid (PFMOPrA) (ng/L) <5
Perfluorononanesulfonic acid (PFNS) (ng/L) <2 Perfluorooctane sulfonamide (PFOSA) (ng/L) <2
Perfluoropentanoic acid (PFPeA) (ng/L) 12.4 3.9 – 18 Perfluoropentanesulfonic acid (PFPeS) (ng/L) <2 No Range Perfluorotetradecanoic acid (PFTeDA) (ng/L) <2
Total PFOA + PFOS (ng/L) 4.3 3.2– 6.7
ANOTHER EMERGING CONTAMINANT
CONTAMINANT YEAR TEST AMOUNT RANGE VIOLATION SOURCE (UNITS) SAMPLED FREQUENCY DETECTED DETECTED Y/N By-product in paint strippers, dyes, greases, antifreeze, aircraft 1,4-Dioxane (ppb) 2020 12 times 0.12 <0.07 - 0.71 N deicing fluids, deodorants, shampoos, cosmetics, manufacture of pharmaceuticals, and manufacture of PET plastic. UNREGULATED UCMR1 CONTAMINANTS CONTAMINANT YEAR TEST AMOUNT RANGE VIOLATION (UNITS) SAMPLED FREQUENCY DETECTED DETECTED Y/N Perchlorate (ppb) < 4
DCPA Acid Metabolites (ppb) < 1
MTBE (ppb) < 5
Nitrobenzene (ppb) < 10
Acetochlor (ppb) < 2 No 2,4 – Dinitrotoluene (ppb) 2002 Quarterly < 2 N range 2,6 – Dinitrotoluene (ppb) < 2
4,4 – DDE (ppb) < 0.8
EPTC (ppb) < 1
Molinate (ppb) < 0.9
Terbacil (ppb) < 2
13 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED UCMR2 CONTAMINANTS
CONTAMINANT YEAR TEST RANGE VIOLATION AMOUNT DETECTED (UNITS) SAMPLED FREQUENCY DETECTED Y/N
Dimethoate (ppb) < 0.7
Terbufos sulfone (ppb) < 0.4
2,2’,4,4’ - tetrabromodiphenyl ether (BDE-47) (ppb) < 0.3
2,2’,4,4’,5 - pentabromodiphenyl ether (BDE-99) (ppb) < 0.9
2,2’,4,4’,5,5’ - hexabromobiphenyl (245-HBB) (ppb) < 0.7
2,2’,4,4’,5,5’ - hexabromodiphenyl ether (BDE-153) (ppb) < 0.8
2,2’,4,4’,6 - pentabromodiphenyl ether (BDE-100) (ppb) < 0.5
1,3 - dinitrobenzene (ppb) < 0.8
2,4,6 - trinitrotoluene (TNT) (ppb) < 0.8
Hexahydro - 1,3,5 - trinitro -1,3,5 - triazine (RDX) (ppb) < 1.0 No Acetochlor (ppb) < 2.0 range
Alachlor (ppb) < 2.0
Metolachlor (ppb) 2010 Quarterly < 1.0 N
Acetochlor ethane sulfonic acid (ESA) (ppb) < 1.0
Acetochlor oxanilic acid (OA) (ppb) < 2.0
Alachlor ESA (ppb) < 1.0
Alachlor OA (ppb) < 2.0
Metolachlor ESA (ppb) < 1.0
Metolachlor OA (ppb) < 2.0
N-nitrosodiethylamine (NDEA) (ppb) < 0.005
N-nitrosodimethylamine (NDMA) (ppt) 4.4 2.3 – 6.5
N-nitrosodi-n-butylamine (NDBA) (ppb) < 0.004
N-nitrosodi-n-propylamine (NDPA) (ppb) < 0.007 No N-nitrosomethylethylamine (NMEA) (ppb) < 0.003 range
N-nitrosopyrrolidine (NPYR) (ppb) < 0.002
UNREGULATED UCMR3 CONTAMINANTS (Note: Unregulated contaminants are those of which EPA has not established drinking water standards but for which monitoring is required. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulations are warranted.)
CONTAMINANT (UNITS) YEAR SAMPLED TEST FREQUENCY AMOUNT DETECTED RANGE DETECTED
Chromium (ppb)
Distribution <0.2 No range
Finished Entry Point <0.2 No range 2015 Quarterly Cobalt (ppb)
Distribution <1.0 No range
Finished Entry Point <1.0 No range
14 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED UCMR3 CONTAMINANTS (continued)
CONTAMINANT (UNITS) YEAR SAMPLED TEST FREQUENCY AMOUNT DETECTED RANGE DETECTED
Molybdemum (ppb)
Distribution <1.0 No range
Finished Entry Point <1.0 No range
Strontium (ppb)
Distribution 64 57 – 68
Finished Entry Point 59 55 – 66
Vanadium (ppb)
Distribution 0.30 No range
Finished Entry Point 0.20 No range
Hexavalent Chromium (ppb)
Distribution 0.05 0.04 – 0.05
Finished Entry Point 0.03 No range
Chlorate (ppb)
Distribution 105 89 – 120
Finished Entry Point 113 92 – 130
1-4-Dioxane (ppb)
Finished Entry Point 0.42 0.16 – 0.77
Bromochlormethane (ppb) 2015 Quarterly Finished Entry Point <0.06 No range Bromomethane (ppb)
Finished Entry Point <0.2 No range 1,3-Butadiene (ppb)
Finished Entry Point <0.1 No range Chlorodifluoromethane (ppb)
Finished Entry Point <0.08 No range Chloromethane (ppb)
Finished Entry Point <0.2 No range 1,1-Dichloroethane (ppb)
Finished Entry Point <0.03 No range
1,2,3-Trichloropropane (ppb)
Finished Entry Point <0.03 No range
Perfluorobutanesulfonic acid (PFBS) (ppb)
Finished Entry Point <0.09 No range
Perfluoroheptanoic acid (PFHpA) (ppb)
Finished Entry Point <0.01 <0.01 – 0.01 Perfluorohexanesulfonic acid (PFHxS) (ppb)
Finished Entry Point <0.03 No range
15 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED UCMR3 CONTAMINANTS (continued)
CONTAMINANT (UNITS) YEAR SAMPLED TEST FREQUENCY AMOUNT DETECTED RANGE DETECTED
Perfluorononanoic acid (PFNA) (ppb)
Finished Entry Point <0.02 No range Perfluorooctane sulfonate (PFOS) (ppb)
Finished Entry Point <0.04 No range Perfluorooctanoic acid (PFOA) (ppb)
Finished Entry Point <0.02 No range 4-Androstene-3,17-dione (ppb)
Finished Entry Point <0.0003 No range Equilin (ppb)
Finished Entry Point <0.004 No range 17beta-Estradiol (ppb) 2015 Quarterly Finished Entry Point <0.0004 No range Estriol (ppb)
Finished Entry Point <0.0008 No range Estrone (ppb)
Finished Entry Point <0.002 No range 17alpha-Ethynyl estradiol (ppb)
Finished Entry Point <0.0009 No range Testosterone (ppb)
Finished Entry Point <0.0001 No range
UNREGULATED UCMR4 CONTAMINANTS
CONTAMINANT YEAR TESTTE AMOUNT RANGE VIOLATION SOURCE (UNITS) SAMPLED FREQUENCY DETECTED DETECTED Y/N Germanium (ppb) <0.300 No range Naturally occurring element; commercially available in combination with other elements and Manganese (ppb) 5.966 <0.400 - 23.3 minerals; used in steel production, fertilizer, batteries and fireworks; drinking water and wastewater treatment chemical; essential nutrient alpha-Hexachlorocyclohexane (ppb) <0.0100 No range
Chlorpyrifos (ppb) <0.0300 No range
Dimethipin (ppb) <0.200 No range
Ethoprop (ppb) <0.0300 No range 2020 Quarterly N Oxyfluorfen (ppb) <0.0500 No range
Profenofos (ppb) <0.300 No range Tebuconazole (ppb) <0.200 No range Permethrin, cis & trans (ppb) <0.0400 No range
Tribufos (ppb) <0.0700 No range Butylated hydroxyanisole (ppb) <0.0300 No range
o-Toluidine (ppb) <0.0700 No range
16 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY UNREGULATED UCMR4 CONTAMINANTS (continued) AVERAGE CONTAMINANT YEAR TEST RANGE VIOLATION AMOUNT SOURCE (UNITS) SAMPLED FREQUENCY DETECTED Y/N DETECTED
Quinoline (ppb) <0.0200
1-Butano (ppb) <2.00
2-Methoxyethanol (ppb) <0.400
2-Propen-1-ol (ppb) <0.500 Anatoxin-a (ppb) <0.0300 2020 Quarterly No range N Cylindrospermopsin (ppb) <0.0900
Total Microcystins & Nodularins (ppb) <0.300
HAA6Br (ppb) 15.03 5.73 - 20.76 Byproduct of drinking water disinfection
HAA9 (ppb) 27.451 13.33- 40.7 Byproduct of drinking water disinfection
Bromide in Jordan Lake (ppb) 83.2 74.7- 99.3 Total Organic Carbon in Jordan Lake (ppb) 6430 6210- 6640 Naturally present in the environment
PHARMACEUTICALS AND PERSONAL CARE PRODUCTS (PPCPs)
CONTAMINANT (UNITS)
Acesulfame-K (ppb) < 20 Calorie-free sugar substitute
Acetaminophen (ppb) < 5 Nonsteroidal anti-inflammatory drug
Albuterol (ppb) < 5 No Range Bronchodilator Amoxicillin (ppb) < 20 Antibiotic
4-Androstene-3,17-dione (ppb) < 5 Hormone
Antipyrine (ppb) < 5 Anti-inflammatory analgesic
Atenolol (ppb) 3.8 <5 – 7.6 Beta blocker/Antihypertensive
Atrazine (ppb) < 5 Herbicide
Azithromycin (ppb) < 20 Antibiotic
Bendroflumethiazide (ppb) < 5 Diuretic 2018 2 times N Bezafibrate (ppb) < 5 Lipid regulator
Bisphenol A (ppb) < 10 Plasticizer
Bromacil (ppb) < 5 Pesticide
Butalbital (ppb) < 5 No Range Barbiturate
Butylparaben (ppb) < 5 Preservative and flavouring agent
Caffeine (ppb) < 5 Psychostimulant
Carbadox (ppb) < 5 Growth promoter especially for pigs
Carbamazepine (ppb) < 5 Anticonvulsant
Carisoprodol (ppb) < 5 Muscle relaxant
Chloramphenicol (ppb) < 10 Antibiotic Chloridazon (ppb) < 5 Herbicide
17 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY PHARMACEUTICALS AND PERSONAL CARE PRODUCTS (PPCPs) (continued)
AVERAGE CONTAMINANT YEAR TEST RANGE VIOLATION AMOUNT SOURCE (UNITS) SAMPLED FREQUENCY DETECTED Y/N DETECTED Chlorotoluron (ppb) < 5 Pesticide
Cimetidine (ppb) < 5 H2 blocker acid reducer
Clofibric acid (ppb) < 5 Lipid regulator
Cotinine (ppb) < 10 Metabolite of nicotine
Cyanazine (ppb) < 5 Pesticide
2,4-D (ppb) < 5 Herbicide
DEET (ppb) < 10 Insect repellent
Dehydronifedipine (ppb) < 5 Antihypertensive
Desethylatrazine (ppb) < 5 Herbicide
Desisopropylatrazine (ppb) < 5 Herbicide
Diaminochlorotriazine (ppb) < 5 Herbicide
Diazepam (ppb) <5 No Range Antidepressant Diclofenac (ppb) <5 Nonsteroidal anti-inflammatory drug
Dilantin (ppb) <20 Anticonvulsant
Diltiazem (ppb) < 5 Antihypertensive 1,7-Dimethylxanthine (ppb) <10 Caffeine metabolite
Diuron (ppb) < 5 Herbicide
Erythromycin (ppb) < 10 Antibiotic 2018 2 times N 17beta-Estradiol (ppb) < 5 Hormone
Estrone (ppb) < 5 Hormone
Ethylparaben (ppb) <20 Preservative
17alpha-Ethynyl estradiol (ppb) < 5 <5 – 7.6 Estrogen medication
Flumequine (ppb) <10 Antibiotic
Fluoxetine (Prozac) (ppb) <10 Antidepressant
Gemfibrozil (ppb) < 5 Lipid regulator Ibuprofen (ppb) < 10 Nonsteroidal anti-inflammatory drug No Range Iohexal (ppb) 17 Contrast agent
Iopromide (ppb) < 5 Contrast agent
Isobutylparaben (ppb) < 5 Preservative
Isoproturon (ppb) <100 Herbicide
Ketoprofen (ppb) < 5 Nonsteroidal anti-inflammatory drug Ketorolac (ppb) < 5 Nonsteroidal anti-inflammatory drug
Lidocaine (ppb) < 5 Anesthetic
Lincomycin (ppb) < 10 Antibiotic
Linuron (ppb) <5 Herbicide
Lopressor (ppb) <20 Beta blocker/Antihypertensive
18 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY PHARMACEUTICALS AND PERSONAL CARE PRODUCTS (PPCPS) (continued)
AVERAGE CONTAMINANT YEAR TEST RANGE VIOLATION AMOUNT SOURCE (UNITS) SAMPLED FREQUENCY DETECTED Y/N DETECTED
Meclofenamic acid (ppb) < 5 Nonsteroidal anti-inflammatory drug
Meprobamate (ppb) < 5 Antidepressant
Metazochlor (ppb) < 4 Herbicide No Range Methylparaben (ppb) < 20 Preservative
Metolachlor (ppb) < 5 Herbicide
Naproxen (ppb) < 10 Nonsteroidal anti-inflammatory drug
Nifedipine (ppb) < 20 Antihypertensive
4-Nonylphenol (ppb) 325 <100 – 650 Detergent metabolite Norethisterone (ppb) < 5 Hormone No Range 4-tert-Octylphenol (ppb) < 50 Endocrine disruptor - estrogenic
Oxolinic acid (ppb) 5 <10 – 10 Feed additive in fish farms Pentoxifylline (ppb) < 5 Treats poor blood circulation 2018 2 times N Primidone (ppb) < 5 Anticonvulsant
Progesterone (ppb) < 5 Hormone Propazine (ppb) < 5 Herbicide Propylparaben (ppb) < 5 Preservative Quinoline (ppb) < 10 Flavouring ingredient Simazine (ppb) < 5 Herbicide Sucralose (ppb) 130 Hormone Sulfachloropyridazine (ppb) < 5 Antimicrobial Sulfadiazine (ppb) < 5 No Range Antibiotic Sulfadimethoxine (ppb) < 5 Antimicrobial Sulfamerazine (ppb) < 5 Antibacterial agent
Sulfamethazine (ppb) < 5 Antibiotic
Sulfamethizole (ppb) < 5 Antibiotic Sulfamethoxazole (ppb) < 5 Antibiotic Sulfathiazole (ppb) < 5 Antimicrobial Testosterone (ppb) < 5 Hormone Stimulant found in cacao plant/ Theobromine (ppb) < 10 tea leaves Theophylline (ppb) < 20 Respiratory diseases drug Thiabendazole (ppb) < 5 Fungicide Triclocarban (ppb) < 5 Antibacterial agent in soaps
Triclosan (ppb) < 10 Antibacterial agent in soaps Trimethoprim (ppb) < 5 Antibiotic
Tris(2-carboxyethyl)phosphine (ppb) < 10 Reducing agent Tris(1,3-dichloro-2-propyl) phos (ppb) < 100 Organophosphate
Warfarin (ppb) < 5 Anticoagulant
19 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY TREATMENT PROCESS INFORMATION The treatment process information contained in the following table does not represent what is in the Finished Drinking Water. The dosages listed for each chemical represent a range of concentrations for that chemical that was used at the Water Plant during 2020 for the water treatment process.
DOSAGE RANGE CHEMICAL (UNITS) YEAR SAMPLED AVERAGE DOSAGE PURPOSE OF TREATMENT DETECTED
Ozone (ppm) 4.04 0 – 5.33 Oxidant
Aluminum Sulfate (ppm) 56 46 – 63 Coagulant
Polymer (ppm) 0.27 0.21 – 0.32 Coagulant and Filtration aid
Sodium Hydroxide (ppm) 19 9 – 30 pH control
Carbon (ppm) 31 18– 81 Taste and odor control and organics removal 2020 Orthophosphate (ppm) 2.8 2.2 – 3.4 Corrosion control Fluoride additive (fluoride off much of year because Hydrofluorosilicic Acid (ppm) 0.56 0 – 0.90 of construction) Chlorine (ppm) 5.78 3.26 – 9.39 Disinfectant
Disinfectant when used in conjunction with chlorine Ammonia (ppm) 0.96 0.0 – 1.26 to form chloramines
THADDEUS WHITEHURST (Senior Laboratory Analyst) has been RACHEL MONSCHEIN (Water System Laboratory Supervisor) employed by the Town of Cary at the Cary/Apex Water Treatment has been employed by the Town of Cary at the Cary/Apex Water Facility Laboratory since July 1993. Treatment Facility Laboratory since January 2014.
20 CARY/APEX WATER TREATMENT FACILITY 2020 WATER QUALITY TESTING SUMMARY QUESTIONS? If you have questions or concerns relating to your drinking water or water service, please contact a citizen advocate. Simply dial 3-1-1 from within Cary town limits or (919) 469-4000 outside of town limits. Or see our website: www.townofcary.org/services. For technical information about this report, please contact Rachel Monschein, Water System Laboratory Supervisor at the Cary/Apex Water Treatment Facility at (919) 362-5507 or [email protected].