2014 Bacteria Data - Lakes, Ponds and Reservoirs Enterococci Data

Two groups of bacteria are monitored to indicate the presense of human sewage and associated pathogens, or disease causing organisms - fecal coliforms and enterococci. The Department of Health (RIHealth) uses a single-value enterococci standard for licensed swimming beaches. The Rhode Island Department of Environmental Management (RIDEM) uses a geometric mean approach for contact recreation standards on all other waters (fresh and salt). In addition, as required by the National Shellfish Sanitation Program for shellfish waters and their tributaries and as an indicator of overall water quality, RIDEM assesses fecal coliform levels. (Fecal coliform data is available for marine waters and shellfish area tributaries in the "Tidal Rivers Bacteria" file).

While URIWW's Analytical Laboratories are State certified, Watershed Watch data is intended for screening purposes only. However our data are very valuable for targeting areas of concerns and for tracking potential sources of bacterial contamination. Samples from various sites may have been collected over a period of days for each collection period, so may reflect dry versus wet weather or rain event values. Please contact Watershed Watch for specific sample dates. Any result above the state standard is considered unsafe, and swimmers should refrain from swimming until results return to acceptable levels, or at least for several days after heavy rain. RI Department of Health standards for recreational contact (i.e.swimming): Fresh Waters - Single sample not to exceed 61 enterococci per 100 mL. RI Department of Environmental Management Enterococci Standards: Non-designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 54 enterococci per 100 mL. Designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 33 enterococci per 100 mL.

Watershed code MONITORING LOCATION MAY JUNE JULY AUG. SEPT. OCT. GEOMEAN - - - Most Probable Number of Enterococci per 100 mL - - - CE Almy Pond 10 - 31 - - 192 39 WD Alton Pond 10 - 16.4 - - 15 13.5 A Annaquatucket Mill Pond 10 33.2 31.2 34 8.6 47 22.9 S Asa Pond 2 - <1 - 1 <1 <1 WD Barber Pond 2 - 5.3 - 2 1 2.1 WD Beach Pond <1 - <1 - 1 2 <1 A Belleville Pond - Lower 1 - 1 - - <1 1.0 A Belleville Pond - Upper 1 6 13.7 91 4.2 5.3 7.4 PA Blackamore Pond <4 124 46 - - 71 20 TH Blue Lake (CT) <1 - 13.7 - - 5.3 1.9 WD Boone Lake 2 - 7.5 - 5.3 6.4 4.7 TH Bowdish Lkae 3.1 PA Carr Pond (WG) <1 - <1 - <1 - <1 WD Chapman Pond <1 1 1 <2 <1 <1 <1 CW Deep Pond <1 - - - <1 - <1 PA Flat River Reservoir 2 - <1 <1 - - <1 WO Georgiaville Pond - 4.2 1 - 5.3 - 2.8 NA Gorton Pond 2 - <1 - <1 Low lake <1 WO Hawkins Pond 2 - - - - 5.3 3.3 WD Hundred Acre Pond 5.3 1 - - - 13.7 4.2 S Indian Lake 1 - <1 - - 2 <1

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Watershed code MONITORING LOCATION MAY JUNE JULY AUG. SEPT. OCT. GEOMEAN - - - Most Probable Number of Enterococci per 100 mL - - - B Keech Pond <1 - 2 - - 1 <1 CE Lily Pond 39.6 - Not run - - - - PA Little Pond 19.8 - 1 - 1 5.3 3.2 WD Locustville Pond 3.1 - 7.5 - - 11.1 6.4 S Long Pond (SK) 2 - 1 - <1 1 <1 PA Mashapaug Pond ------WD Meadowbrook Pond 10 - <10 - - 2 2.7 NA Melville Pond - Upper 4 - 64 <2 10 No bottle 4.8 PA Mishnock Lake 20 - 2 - 1 3.1 3.3 B Pascoag Reservoir - 27.1 1 - - - 5.2 WD Pasquisett Pond <2 2 1 3 1 2 1.2 NA Prince's Pond - <10 20 - - <10 <10 WD Queen Usquepaugh 111 - 56 - - 297 123 CE - <10 83.1 <2 118.4 <10 4.6 PA Randall Pond 17.4 - 5.3 44 17.8 13.7 15.8 PA RWP #2 - Willow Lake 703 - 13.2 - - 77 89.3 PA RWP #4 - Willow/Pleasure Bridge <4 19.6 53.8 34 - 325 21.6 PA RWP #7 - Cunliff Lake 3 12.6 5.2 - - 15 7.4 PA Sand Pond 101.3 - 1 - 1 25.4 7.1 CW Schoolhouse Pond - Lower <1 - - - 1 - <1 CW Schoolhouse Pond - Upper 2 - - - 1 - 1.0 B Scott Pond ------A Secret Lake 7.5 - 2 - - 6.4 4.6 S Silver Lake <1 - 1 - 1 2 <1 WO Slack's Reservoir 2 2 4.2 - 1 1 1.8 B Smith & Sayles Reservoir <1 4.2 7.5 - - - 1.5 PA Spectacle Pond - - 19.2 - - 39 27.5 B Spring Grove Pond 5.3 - 7.5 - - 47.5 12.4 B Spring Lake 2 - 1 - 2 2 1.7 TA Stafford Pond <1 - 5.3 - <1 - <1 PA Tiogue Lake <1 - 69.7 - <1 7.5 3.7 CW Trustom Pond - Osprey Pt <10 <10 <1 2 <1 34.8 <10 CW Trustom Pond - Otter Pt. <10 <10 <1 <2 <1 27.4 <10 NA = Not available. Typically means sample was delivered well past acceptable holding time. RI Department of Health standards for recreational contact (i.e.swimming): Fresh Waters - Single Sample Not to exceed 61 enterococci per 100 mL. RI Department of Environmental Management Enterococci Standards: Non-designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 54 enterococci per 100 mL. Designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 33 enterococci per 100 mL.

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Watershed code MONITORING LOCATION MAY JUNE JULY AUG. SEPT. OCT. GEOMEAN - - - Most Probable Number of Enterococci per 100 mL - - - B 1 ------NA Warwick Pond 1 1 4.2 2 3.1 2 1 S Wash Pond 1 - 2 - 1 2 1.4 WD <1 - 1 - <1 <1 <1 WO Waterman Reservoir 2 - 7.5 - - 3.1 3.6 S White Pond 3.1 - <1 - 2 3.1 1.2 WD Wincheck Pond <1 - 3.1 - 8.7 9.9 2.3 WD Worden Pond 1 - 31 - - 1 3.1 WD Wyoming Pond <1 - 12.2 - - 3.1 1.6 WD Yawgoo Pond 6.4 1 1 1 <1 6.4 1.3

RI Department of Health standards for recreational contact (i.e.swimming): Fresh Waters - Single Sample Not to exceed 61 enterococci per 100 mL. RI Department of Environmental Management Enterococci Standards: Non-designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 54 enterococci per 100 mL. Designated Bathing Beach (Fresh) Waters Geometric Mean Density - Not to exceed 33 enterococci per 100 mL. A factsheet describing how bacteria are monitored, what bacterial indicators are, where bacteria come from and how we can all help to reduce bacterial input into our local water resources is available at http://www.uri.edu/ce/wq/ww/Publications/Bacteria.pdf See the Rhode Island Department of Health beach monitoring website (http://www.ribeaches.org/) for additional information about beach monitoring and state standards. The Rhode Island Department of Environmental Management website has information on State efforts to restore waters impaired by bacteria and other pollutants (http://www.dem.ri.gov/programs/benviron/water/quality/index.htm).

Kayaking Wyoming Pond (Photo by kayaktoday - www.panoramio.com)

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