mystic river watershed water quality grades and compliance ...€¦ · 2016 mystic river watershed...
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Mystic River
(Fresh Water)
Mystic River(Salt Water)
Little River
Upper M
ystic
Lake
Island
End R
iver
Mald e
nRive
r
ARLINGTON
MALDEN
WILMINGTON
SOMERVILLE
WAKEFIELD
CAMBRIDGE
READING
WOBURN
MELROSE
LEXINGTON
WATERTOWN
MEDFORD
CHELSEA
B O S T O N
STONEHAM
REVERE
BURLINGTON
WINCHESTER
WINTHROP
BELMONT
EVERETT
Mill Brook
Winn's Brook
Alewife Brook
Aberj
onaRiv
er
Meetin
gho
useBroo
k
Mill Creek
Chelse
a Cree
k Bel le Is le Inlet
5
2016 Mystic RiverWatershed Report Card(based on 2014-2016 bacterial data)
0 1 20.5Miles
Mystic River Watershed Water Quality Grades and Compliance Rates - Calendar Year 2016
Mystic River WatershedTown Boundary
Mystic River Watershed AssociationMassachusetts Water Resources Authority
Monitoring Points!(
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Average Compliance Rates for Swimming and Boating StandardsA B C FD
100-86 85-71 70-56 55-40 39-0
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 #11498, 5/24/2017
GradeA+AA-A-A-
AverageWater Segment Compliance RateUpper Mystic Lake 98.9%Chelsea Creek 91.2%Mystic River (Salt Water) 87.6%Mystic River (Fresh Water) 85.8%Belle Isle Inlet 85.7%
C+C+C
Meetinghouse BrookMalden RiverAberjona River
66.5%65.1%61.8%
D+D+DD-FF
Alewife BrookMill BrookLittle RiverWinn's BrookIsland End RiverMill Creek
54.2%53.1%49.4%42.0%36.3%33.5%