Water Quality
Water Quality > Saw Mill River > Yonkers- Dunbar Street

Yonkers- Dunbar Street

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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

6 Samples taken

Sample Date [i] Enterococcus Count
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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
09/24/2015 145 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 12033 Beach Advisory 0.9 0.0 0.0 0.0 0.9
08/27/2015 1076 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 1067 Beach Advisory 0.0 0.0 0.7 0.0 0.7
07/30/2015 1785 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 605 Beach Advisory 0.0 0.0 1.5 0.0 1.5

Entero Count (fecal indicator) and Rainfall Correlation

6 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:

This site is located in a heavily developed commercial area, upstream of a section of the river that the US Army Corps of Engineers has channelized for flood control. The site receives street runoff from the Saw Mill River Parkway via several downspouts, as well as other surface runoff. Sampling was discontinued at this site in 2016.

Agencies Responsible:

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