2016 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 Rhode Island 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): Single sample not to exceed 60 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 - - - CC Almy Pond 44 - <10 - - - 2 WD Alton Pond 9.8 - 28.5 - - 9.7 14 A Annaquatucket Mill Pond 9.7 15 2 4 2 2 4 S Asa Pond <1 - <1 - - <1 <1 WD Barber Pond <1 2 <1 - <1 - <1 WD Beach Pond 1 <1 <1 - <1 <1 <1 A Belleville Pond - Lower 1 - <1 - - 1 <1 A Belleville Pond - Upper <1 <1 <1 <1 2 <1 <1 WD Billings Lake (CT) 1 ------PA Blackamore Pond - <4 2 - - 4.1 1 TH Blue Lake (CT) <1 - 1 - - 20 <1 WD Boone Lake <1 - 4.2 21.2 2 8.7 3 TH Bowdish Lake <1 - 1 - - <1 <1 CE Briggs Marsh <1 - NA - - <10 - PE Carr Pond (NK) <1 - <1 - <1 1 <1 PA Carr Pond (WG) 1 - <1 <1 - <1 <1 TE Central Pond (Turner North) <2 - <4 - - 1 <2 WD Chapman Pond 2 - <1 - - 4 <1 PA Coventry Reservoir (Stump P) <1 - <1 - - - <1 CW Deep Pond <1 - NA - - - - PA Flat River Reservoir - 1 4.1 <1 - 1 1

Page 1 of 3 2016 Bacteria Data - Lakes, Ponds and Reservoirs Enterococci Data

Watershed code MONITORING LOCATION MAY JUNE JULY AUG. SEPT. OCT. GEOMEAN - - - Most Probable Number of Enterococci per 100 mL - - - WO Georgiaville Pond <1 - 1 - 1 105.9 2 NA Gorton Pond <1 - <1 - <1 <1 <1 WO Hawkins Pond 4.2 - 9.7 3.1 - <4 5 WD Hundred Acre Pond - - <1 - - 4 - S Indian Lake 3.1 - 1 - - 3 2 B Keech Pond 2 - 5.2 - - <1 3 PA Little Pond 4.2 - 51 - 2 2 5 WD Locustville Pond <1 - 1 - - 1 <1 S Long Pond (SK) <1 - <1 <1 <1 3.1 <1 WD Meadowbrook Pond 3.1 - <1 - - 6.2 1 NA Melville Pond - Upper 1 - 10 - - 2 3 PA Mishnock Lake 2 - 28.5 - <1 34.4 13 SK Nanaquaket Pond <10 <10 - - <10 B Pascoag Reservoir 1 - <1 - 1 - <1 WD Pasquisett Pond 6.3 - 5.1 2 <1 1 3 S Peacedale Res. (CA Jim's Pond) <1 - 1 - - 42.8 <1 NA Prince's Pond <10 - <1 - - 318 <10 WD Queen Usquepaugh 25.6 - 45.5 - - 6.2 19 PA Randall Pond 4.1 - 1 - - 8.4 3 PA RWP #4 - Willow/Pleasure Bridge 403 6 <4 8 16.4 4 9 PA RWP #7 - Cunliff Lake 4.1 - 6.2 - - 6.1 5 PA Sand Pond 19.2 5.2 50.4 <1 <1 27.8 3 CW Schoolhouse Pond - Lower <1 - 15 - - - 1 CW Schoolhouse Pond - Upper <1 - NA - - - - A Secret Lake 3.1 - 15.6 - - 3 5 S Silver Lake 15 - <1 - 1 2 1 WO Slack's Reservoir - 2 - 8.7 1 29.6 5 B Smith & Sayles Reservoir - 2 <1 - <1 - <1 WD Spaulding Pond 2 - 10.8 - - 2 4 PA Spectacle Pond 10.4 - 20.8 - 20.8 6.2 13 B Spring Grove Pond 1 5.2 - <1 1 B Spring Lake <1 - <1 2 2 6.3 1 TA Stafford Pond - 5.2 <1 2 - 30 2 NA = Not available. Typically means sample was delivered well past acceptable holding time. RI Department of Health standards for recreational contact (i.e.swimming): Single Sample Not to exceed 60 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.

Page 2 of 3 2016 Bacteria Data - Lakes, Ponds and Reservoirs Enterococci Data

Watershed code MONITORING LOCATION MAY JUNE JULY AUG. SEPT. OCT. GEOMEAN - - - Most Probable Number of Enterococci per 100 mL - - - PA Tiogue Lake 3.1 - 4.2 - - 1 2 WD Tucker Pond 2 - <1 - - - <1 B Wallum Lake <1 ------NA Warwick Pond 17.3 11 1 <1 4.2 7.4 3 S Wash Pond <1 - 4.2 1 - <1 1 WD Watchaug Pond 3.1 - 1 - <1 5.1 3 WO Waterman Reservoir 6.3 - 1 - - 488.4 15 NA Wesquage Pond - - - - <10 <10 <10 S White Pond <1 - 2 <1 - 7.5 <1 WD Wincheck Pond 2 - <1 - 1 4.2 <1 WD Worden Pond 3.1 - <1 - - 12.1 2 WD Wyassup Lake 1 - 25.4 - 2 310 11 WD Wyoming Pond 6.3 - 4.2 - - 3 4 WD Yawgoo Pond 1 1 <1 1 4.2 - 1 RI Department of Health standards for recreational contact (i.e.swimming): Single Sample Not to exceed 60 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://cels.uri.edu/docslink/ww/water-quality- factsheets/Bacteria.pdf. See the Rhode Island Department of Health beach monitoring website (http://www.health.ri.gov/beaches/) 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/water/).

Spauling Lake photo from http://aroundguides.com/22032 534

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