Water Monitoring

We monitor water quality around the Neponset River Watershed in order to catch and reduce both “point source” and “non-point source pollution.”


Hotspot Program

Started by a group of generous individual donors in 2015, our Hotspot Program allows us to follow up on problem areas identified through our CWMN sampling data and anecdotal reports.


Citizen Water Monitoring Network

The Citizen Water Monitoring Network or “CWMN” is an Environmental Protection Agency-approved, volunteer-based approach to water quality monitoring that has been running at NepRWA for over 20 years. Since 1995, CWMN has provided critical scientific data that enables us to advocate for the cleanup of pollution. Read water quality data from samples gathered by CWMN volunteers, which includes stream status and maps of E. coli.


Sources of Pollution

“Point source” pollution originates from a single, identifiable source (i.e., a leaking sewer pipe).

“Nonpoint source” pollution originates from a variety of sources and may contain things like fertilizers, herbicides, pesticides, ice-melt products, pet waste, anti-freeze, motor oil, car exhaust products, and litter.

Both types of pollution are responsible for degrading water quality, injuring wildlife, damaging wildlife habitat, degrading recreational resources, and damaging human health. Water quality testing enables us to identify waters with high levels of pollutants and then find and stop that pollution (especially point source pollution) at its source.