1. See Department of Environmental Protection, Division of Water Pollution Control: 314cmr4.05(3)(b)4
2. Geometric mean of 5 or more samples taken within a 60 day period for Massachusetts.
3. Levels are indicated for Class B waters.



















Ivan Ussach 
MRWC Watershed Coordinator 
978-248-9491 
ivan@millersriver.net 


Keith Davies 
MRWC/Americorps
Outreach Coordinator 
Watershed_americorps@mountgrace.org