Water Quality
Water Quality > Tributary and Waterfront Data > Pocantico River > New Castle- Echo Lake

New Castle- Echo Lake

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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

66 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
10/19/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/21/2023 108 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/24/2023 40 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2023 40 Acceptable 0.0 0.0 0.0 0.0 0.0
07/27/2023 602 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/15/2023 >2420 Beach Advisory 0.0 0.6 0.0 0.1 0.7
05/18/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2022 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/22/2022 733 Beach Advisory 0.0 0.3 0.0 0.0 0.3
06/09/2022 128 Beach Advisory 1.0 0.1 0.0 0.0 1.1
05/12/2022 120 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/21/2021 160 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/23/2021 712 Beach Advisory 0.0 0.0 0.0 0.0 0.1
08/19/2021 204 Beach Advisory 0.8 0.0 0.0 0.0 0.8
07/15/2021 30 Acceptable 0.0 0.0 0.0 0.2 0.2
06/17/2021 10 Acceptable 0.0 0.0 0.0 0.1 0.1
05/20/2021 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
10/19/2019 1553 Beach Advisory 0.0 0.0 0.0 2.9 3.0
09/21/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/15/2019 86 Beach Advisory 0.0 0.0 0.7 0.0 0.7
05/18/2019 20 Acceptable 0.0 0.0 0.0 0.0 0.1
10/27/2018 10 Acceptable 0.3 0.0 0.0 0.0 0.3
09/15/2018 10 Acceptable 0.0 0.0 0.0 1.1 1.1
08/18/2018 3873 Beach Advisory 0.5 1.4 0.0 0.0 1.9
06/16/2018 29 Acceptable 0.0 0.0 0.0 0.0 0.0
05/19/2018 1300 Beach Advisory 0.2 0.0 0.3 0.9 1.4
10/21/2017 55 Acceptable 0.0 0.0 0.0 0.0 0.0
09/16/2017 29 Acceptable 0.0 0.0 0.4 0.0 0.5
08/19/2017 100 Beach Advisory 0.0 0.4 0.0 0.0 0.4
07/15/2017 1414 Beach Advisory 0.0 0.5 0.4 0.0 0.8
06/17/2017 1046 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/20/2017 33 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2016 30 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2016 128 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2016 >2420 Beach Advisory 0.0 0.4 0.0 0.3 0.7
07/09/2016 >2420 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/11/2016 1733 Beach Advisory 0.0 0.0 0.0 0.3 0.3
05/14/2016 5 Acceptable 0.0 0.2 0.0 0.0 0.2
10/03/2015 1733 Beach Advisory 0.4 0.5 0.1 1.3 2.2
09/05/2015 188 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/01/2015 >2420 Beach Advisory 0.0 0.7 0.0 0.0 0.7
07/04/2015 64 Beach Advisory 0.0 0.0 0.0 0.6 0.6
06/06/2015 45 Acceptable 0.1 0.0 0.0 0.0 0.1
05/02/2015 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/04/2014 >2420 Beach Advisory 0.8 0.0 0.0 0.0 0.8
09/06/2014 260 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/02/2014 132 Beach Advisory 0.2 0.2 0.0 0.0 0.4
07/05/2014 1300 Beach Advisory 0.0 0.1 1.4 1.5 3.0
06/07/2014 15 Acceptable 0.0 0.0 0.5 0.2 0.6
05/03/2014 461 Beach Advisory 0.0 0.0 0.3 1.4 1.7
10/12/2013 54 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2013 28 Acceptable 0.0 0.1 1.7 0.0 1.8
08/10/2013 159 Beach Advisory 0.0 0.3 0.1 0.0 0.4
07/13/2013 93 Beach Advisory 0.0 0.1 0.0 0.2 0.4
06/15/2013 178 Beach Advisory 0.0 0.3 0.7 0.0 1.0
05/04/2013 72 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/06/2012 1733 Beach Advisory 0.0 0.0 1.2 0.3 1.5
09/08/2012 12 Acceptable 1.5 0.0 0.0 0.5 2.0
07/14/2012 2420 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/02/2012 110 Beach Advisory 0.9 0.0 0.0 0.0 1.0
05/12/2012 51 Acceptable 0.0 0.0 0.3 0.7 1.0
11/06/2011 16 Acceptable 0.0 0.0 0.0 0.0 0.0
11/04/2010 >2420 Beach Advisory 1.0 0.0 0.0 0.0 1.0

Entero Count (fecal indicator) and Rainfall Correlation

66 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 trained by Riverkeeper, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

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 headwaters site is at the outlet of Echo Lake, which is located just south of the intersection of the Taconic State Parkway with Routes 100 and 133.

Agencies Responsible:

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

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