2013 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 33 - 21 - - 64 36 WD Alton Pond 11.1 - 45.9 - - 3.1 12 A Annaquatucket Mill Pond 4.1 22 95 23 <2 2 7 S Asa Pond <1 - 6.2 - - 1 1 WD Barber Pond <1 - 1 - 1 1 1 WD Beach Pond 1 - 1 - 2 <1 1 A Belleville Pond - Lower 2 - 2 - - <1 1 A Belleville Pond - Upper 7.5 10 9.9 19 5 5.3 8 PA Blackamore Pond - 26 <10 - - 3.1 4 TH Blue Lake (CT) <1 - 3 - - 2 <1 WD Boone Lake 6.4 - 2 - 8 1 3 PA Breezy Lake (Upper Dam P.) 3 - 2419.6 - - 3.1 28 PA Carr Pond (WG) <1 - 3.1 - <1 <1 <1 WD Chapman Pond <1 - 1 - - - <1 CW Cross Mills Pond ------CW Deep Pond - - 1 - - - - PA Flat River Reservoir - - - 1 2 - - WO Georgiaville Pond 2 - 7.4 - 1 - 2.5 NA Gorton Pond <1 - 1 - 1 <1 <1 WO Hawkins Pond 1 - 4.2 - - 6.4 3.0 S Indian Lake <1 - 1 - - 3.1 <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 2 - 1 - - 3.1 1.8 CE Lily Pond 498.4 - - - - 55.6 PA Little Pond <1 - 3.1 - 3.1 6.4 2 WD Locustville Pond 1.0 - 10.9 - - 2 2.8 CE Long Pond (LC) 2 - 8.5 - - 13.7 6.2 S Long Pond (SK) 1.0 - <1 - 1 1 <1 PA Mashapaug Pond ------WD Meadowbrook Pond 4.2 - 20.9 - - 62.4 17.6 NA Melville Pond - Upper 2 - 6.1 - - 3.1 3.4 PA Mishnock Lake <1 - 2 - <1 2 <1 B Pascoag Reservoir - - NA 1 1 - 1 WD Pasquisett Pond 1.0 2 5.2 1 - 2 2 S Peace Dale Reservoir 9.9 - 2 - - 4 4 NA Prince's Pond 1.0 - <10 - - <10 <1 WD Queen Usquepaugh 12.2 - 27.5 - - 17.9 18 CE <4 - - 10 - <1 1 PA Randall Pond 1 - 4.2 - - 3.1 2.4 CE Round Pond 5.3 - 25.6 - - 20 13.9 PA RWP #1 - Roosevelt Pond inflow ------PA RWP #2 - Willow Lake 35.9 - 34.2 - - 15 26 PA RWP #4 - Willow/Pleasure Bridge NA - 149.2 - - 13.7 45 PA RWP #7 - Cunliff Lake 2.0 - 41 - - 12.8 10 PA RWP #9 - Elm Lake Outflow 19.4 - 41 - 15 19.2 22 PA Sand Pond 3.1 - 1 - <1 2 <1 CW Schoolhouse Pond - Lower - - 1 - - - - CW Schoolhouse Pond - Upper - - <1 - - - - B Scott Pond <1 - - 10 19 2 2.5 A Secret Lake 3.1 - 3 - - 2 2.6 S Silver Lake <1 - 5.3 - - <1 <1 WO Slack's Reservoir 8.7 - 9.5 - 2 4.2 5.1 B Smith & Sayles Reservoir 9.9 - no bottle - 2 - 4.4 PA Spectacle Pond 4.1 - 43.2 - - 2 7.1

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.

Page 2 of 3 2013 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 - - - B Spring Grove Pond 2 - 10.4 - - 6.4 5.1 B Spring Lake - 1 17.8 1 <1 1 1.1 TA Stafford Pond - 1 <1 - 3.1 1 <1 PA Tiogue Lake 1 - 19.2 - 2 - 3.4 CW Trustom Pond - Otter Pt. <10 <10 1 <10 <10 10 <10 CW Trustom Pond - Osprey Pt <10 324 1 <10 <10 <10 <10 WD Tucker Pond <1 - 4.2 - 2 <1 <1 B Wallum Lake <1 - <1 - - - <1 NA Warwick Pond 31 13 1 38 <1 <1 2.3 S Wash Pond <1 - 3.1 - <1 <1 <1 WD Watchaug Pond 1 - 2 - <1 1 <1 WO Waterman Reservoir 3.1 - 34.4 - - 3.1 6.9 M Wenscott Reservoir 1 - 3 - - <1 <1 S White Pond <1 - <1 - 2 5.3 <1 WD Wincheck Pond <1 - 2 - <1 3.1 <1 WD Worden Pond 1 - 1 - - <1 <1 WD Yawgoo Pond <1 <1 <1 2 2 1 <1

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).

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