Yonkers- Hearst Street

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

42 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.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
10/18/201897Beach Advisory0.
10/04/20183076Beach Advisory0.
09/20/2018537Beach Advisory0.
09/06/201863Beach Advisory0.
08/23/20181674Beach Advisory0.
08/09/20183448Beach Advisory0.
07/26/20183448Beach Advisory0.
07/12/2018235Beach Advisory0.
06/28/201824196Beach Advisory0.
06/14/201897Beach Advisory0.
05/31/2018181Beach Advisory0.
10/26/2017226Beach Advisory0.
10/12/2017383Beach Advisory0.
09/28/201774Beach Advisory0.
08/31/201784Beach Advisory0.
08/03/20174611Beach Advisory0.
07/06/2017156Beach Advisory0.
06/22/2017233Beach Advisory0.
06/08/2017155Beach Advisory0.
05/25/20176131Beach Advisory0.
05/11/201796Beach Advisory0.
10/27/2016120Beach Advisory0.
10/13/2016120Beach Advisory0.
09/01/2016230Beach Advisory0.
08/18/2016100Beach Advisory0.
08/04/2016140Beach Advisory0.
07/14/20162720Beach Advisory0.
06/30/2016380Beach Advisory0.
06/16/2016280Beach Advisory0.
06/02/2016160Beach Advisory0.
10/08/2015266Beach Advisory0.
09/24/2015109Beach Advisory0.
09/10/2015>24196Beach Advisory0.
08/27/2015327Beach Advisory0.
08/13/2015567Beach Advisory0.
07/30/20151034Beach Advisory0.
07/16/2015473Beach Advisory0.

Entero Count (fecal indicator) and Rainfall Correlation

42 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 sampling site is located approximately one mile upstream of the channelized former industrial area at the outskirts of downtown Yonkers. Near this location, residential development becomes more dense, as the river flows into Yonkers.

Agencies Responsible:

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

Keep the Hudson River flowing!
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