WOBURN

STONEHAM

MELROSE

WINCHESTER

LEXINGTON

MALDEN

MEDFORD

ARLINGTON

SOMERVILLE

BELMONT

CAMBRIDGE

WINTHROP

Mystic River Watershed Water Quality
Grades and Compliance Rates - Calendar Year 2014

READING

WILMINGTON

A+

Upper Mystic Lake

96%

A

Mystic River (Salt Water)

90%

A-

Chelsea Creek

87%

B+

Mystic River (Fresh Water)

85%

C+

Aberjona River

65%

c

Belle Isle Inlet

64%

C-

Maiden River

59%

D

Meetinghouse Brook

47%

D

Alewife Brook

46%

D-

Mill Brook

43%

D-

Little River

40%

F

Winn's Brook

33%

F

Island End River

33%

F

Mill Creek

32%

REVERE

WATERTOWN

WAKEFIELD

BURLINGTON

Average Compliance Rates for Swimming and Boating Standards

B	C

100-86 85-71	70-56	55-40	39-0

Monitoring Points

Q Mystic River Watershed Association
A Massachusetts Water Resources Authority

Mystic River Watershed
Town Boundary

2014 Mystic River
Watershed Report Card

(based on 2012-2014 bacterial data)

Data Sources: Mystic River Watershed Association, U.S. EPA, Massachusetts Water Resources Authority, MassGIS.
Basemap: Canvas/ World Light Gray Base (c) ESRI and its data suppliers.

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