Vnaijii'J QUINCY Mo/ MILTON WESWOOD NORWOOD* MEDFIELD 'CANTON qui d Brook f Wilie t Pond j Turner Emid WALPOLE STQUefllON Ganapat^e ,/-¦ Farm Pond SHARON1 FOTCBOROUGH 1Crack Rock Pond / Neponset River Watershed Water Quality Grades and Compliance Rates - Calendar Year 2021 Grade Water Segment Average Compliance Rate A+ Crackrock Pond 100.0 A+ Ganawatte Farm Pond 97.3 A+ Turner's Pond 96.7 A Willett Pond 93.0 A- Massapoag Brook 89.6 A- East Branch 86.3 A- Steep Hill Brook 86.2 B+ Mother Brook 83.4 B+ Mine Brook 83.4 B+ Beaver Brook 80.2 \[ B Middle Neponset River 79.3 \ B Spring Brook 77.9 B Mill Brook 77.8 B Upper Neponset River 75.8 B Ponkapoag Brook 75.2 B Pecunit Brook 75.1 B- Beaver Meadow Brook 74.1 B- Lower Neponset River 72.0 DOVER 1 N/v BOSTON DEDHAM RANDOLPH C+ Hawes Brook 67.8 C Traphole Brook 61.2 C Purgatory Brook 60.2 C- Pequit Brook 59.1 C- Pine Tree Brook 55.7 D+ Germany Brook 50.0 F Unquity Brook 33.6 F Meadow Brook 25.1 HERE, Garmin, © OpenStreetMap contributors, and the GIS user a Average Compliance Rates for Swimming and Boating Standards A B C D F 100-86 85-71 70-56 55-40 39-0 Monitoring Points 2021 Neponset River Watershed Report Card (based on 2019-2021 bacterial data) Data Sources: Mystic River Watershed Association, U.S. EPA, Massachusetts Water Resources Authority, MassGIS. Basemap: Canvas/World Light Gray Base © ESRI and its data suppliers. EPA Region 1 GIS Center map #13390, 7/14/2022 ------- |