Water Quality
Water Quality > Ossining Waterfront > Ossining- Louis Engel Park beach

Ossining- Louis Engel Park beach

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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

9 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
07/27/2023 134 Beach Advisory 0.0 0.0 0.4 0.0 0.4
05/18/2023 156 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/20/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2022 31 Acceptable 0.0 0.0 0.0 0.0 0.0
09/01/2022 408 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/22/2022 85 Beach Advisory 0.0 0.3 0.0 0.0 0.3
05/12/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2021 19 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2021 1106 Beach Advisory 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

9 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:

Until the mid-1900's, Louis Engel Park was home to a Hudson River swimming beach, until the floating dock was deliberately sunk.

Agencies Responsible:

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

Enterococcus is an EPA-approved fecal contamination indicator.

Ossining waterfront samples are taken by Ossining High School students and processed at OHS, using methods and study designs that are consistent with Riverkeeper’s Hudson River and Community Water Quality Testing programs.