Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.
About this location:
The Tertia Brook is the first named tributary to enter the Saw Mill River. This site is located where the Tertia Brook enters the parking lot of the Chappaqua Public Library. Upstream of here, the brook flows from its headwaters through residential areas.
Westchester County Dept. of Health: 914-813-5000; NYSDEC Region 3: 914-428-2505