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Projects > Monthly Water Quality Monitoring
APRIL 2012 WATER QUALITY MAP
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Rainfall At Logan
International Airport (inches)
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| 3 days prior to sampling |
0.00 |
| 2 days prior to sampling |
Trace |
| 1 day prior to sampling |
0.00 |
| Day of sampling |
0.00 |
What does the map mean?
The blue color represents river reaches that met the E.
coli swimming
standard of 126 colony forming units per 100 milliliters
(about a teacup of water) (#/100ml). Yellow represents the reaches of
the river that exceeded the swimming standard yet met the boating standard
of 630/100ml. A violation of the boating standard is represented by the
red color. Finally, any reaches of the river colored gray represent non-sampled
areas.
Standards are set by the Massachusetts Department of Environmental Protection (MassDEP) to indicate
level of health risk in freshwaters. MassDEP recommends not
swimming or fishing when the geometric mean of bacteria counts exceed
126/100ml, and not boating on days when the geometric mean of levels
rise above 630/100ml.
See table of results.
Mapping capabilities made possible due to support from:
ESRI and the ESRI Logo are licensed trademarks of Environmental Systems Research Institute, Inc. |
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YOUR WATERSHED 
