Water Quality > Tributary and Waterfront Data > Saw Mill River > Mount Pleasant- Nannyhagen Brook tributary

Mount Pleasant- Nannyhagen Brook tributary

Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

20 Samples taken

Sample Date [i] Enterococcus Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

Quality Rain, day of (in) Prior Day 2 Days Prior 3 Days Prior Rain 4 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
05/11/2017 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/27/2016 120 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/13/2016 150 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 220 Beach Advisory 0.0 0.0 0.4 0.0 0.4
09/15/2016 110 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 1190 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/18/2016 3450 Beach Advisory 0.0 0.0 0.4 0.0 0.4
08/04/2016 290 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2016 5170 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/30/2016 2360 Beach Advisory 0.0 0.0 0.3 0.3 0.7
06/16/2016 590 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2016 220 Beach Advisory 0.0 0.0 0.0 0.6 0.6
05/19/2016 50 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2015 85 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/24/2015 183 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 >24196 Beach Advisory 0.2 0.0 0.0 0.0 0.3
08/27/2015 345 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 435 Beach Advisory 0.0 0.0 0.6 0.0 0.6
07/30/2015 471 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 728 Beach Advisory 0.0 0.0 0.4 0.0 0.4

Entero Count (fecal indicator) and Rainfall Correlation

20 Samples taken

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by citizen scientists and processed at laboratories that aren't directly affiliated with Riverkeeper, using methods and study designs that are consistent with Riverkeeper's Hudson River and Citizen Testing programs.

Rainfall data comes from wunderground.com. Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

The Nannyhagen Brook is the second named tributary to the Saw Mill River. The Brook flows through mostly residential areas, with less dense development in the upper watershed.

Agencies Responsible:

Westchester County Dept. of Health: 914-813-5000; NYSDEC Region 3: 914-428-2505

Help Save the Environmental Law That Banned Fracking
Become a Member