Water Quality
Water Quality > Tributary and Waterfront Data > Saw Mill River > New Castle- Duck Pond spillway

New Castle- Duck Pond spillway

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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

91 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 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/05/2023 294 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/21/2023 256 Beach Advisory 0.0 0.0 0.0 1.9 1.9
09/07/2023 146 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/24/2023 134 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/24/2023 134 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/10/2023 223 Beach Advisory 0.0 0.0 0.0 1.7 1.7
07/27/2023 1198 Beach Advisory 0.0 0.0 0.5 0.0 0.5
07/13/2023 183 Beach Advisory 0.0 0.0 0.0 0.8 0.8
06/29/2023 86 Beach Advisory 0.0 0.0 0.1 1.0 1.1
06/15/2023 17392 Beach Advisory 0.0 0.6 0.0 0.1 0.7
06/01/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2023 93 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/04/2023 63 Beach Advisory 0.0 0.0 0.0 0.3 0.3
10/27/2022 73 Beach Advisory 0.0 0.0 0.1 0.3 0.4
10/13/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2022 173 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/15/2022 41 Acceptable 0.0 0.0 0.6 0.2 0.8
09/01/2022 209 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/18/2022 650 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/04/2022 520 Beach Advisory 0.0 0.0 0.0 0.4 0.4
07/21/2022 233 Beach Advisory 0.0 0.0 0.0 2.3 2.4
07/07/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/23/2022 127 Beach Advisory 0.2 0.1 0.0 0.0 0.3
06/09/2022 >24196 Beach Advisory 1.8 0.1 0.0 0.0 1.9
05/26/2022 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/12/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2021 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/07/2021 84 Beach Advisory 0.0 0.0 0.0 0.5 0.6
09/23/2021 96 Beach Advisory 0.0 0.0 0.0 0.0 0.1
09/09/2021 754 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/05/2021 31 Acceptable 0.0 0.0 0.0 0.0 0.0
07/22/2021 216 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/08/2021 146 Beach Advisory 0.0 0.0 0.7 0.0 0.7
06/24/2021 107 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/10/2021 591 Beach Advisory 0.0 0.0 0.0 0.9 0.9
05/27/2021 52 Acceptable 0.1 0.0 0.0 0.0 0.1
05/13/2021 52 Acceptable 0.0 0.0 0.0 0.2 0.2
10/24/2019 121 Beach Advisory 0.0 0.2 0.2 0.0 0.4
10/10/2019 156 Beach Advisory 0.0 0.3 0.1 0.2 0.6
09/12/2019 70 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/15/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/01/2019 171 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/02/2019 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/20/2019 298 Beach Advisory 0.0 0.0 1.1 0.0 1.1
06/06/2019 62 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 107 Beach Advisory 0.1 0.0 0.0 0.2 0.3
05/09/2019 63 Beach Advisory 0.0 0.0 0.1 0.0 0.1
10/18/2018 73 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/04/2018 910 Beach Advisory 0.0 0.0 2.4 0.0 2.4
09/20/2018 816 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/06/2018 31 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2018 934 Beach Advisory 0.0 0.9 0.0 0.0 0.9
08/09/2018 216 Beach Advisory 0.0 0.3 0.6 0.0 0.9
07/26/2018 2723 Beach Advisory 0.0 0.9 0.0 0.6 1.5
07/12/2018 253 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/28/2018 >24196 Beach Advisory 1.1 0.1 0.0 0.0 1.1
06/14/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/31/2018 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/17/2018 2909 Beach Advisory 0.2 0.8 0.4 0.0 1.4
10/26/2017 246 Beach Advisory 0.0 0.0 0.4 0.0 0.4
10/12/2017 1495 Beach Advisory 0.1 0.0 0.0 0.2 0.3
09/28/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/31/2017 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/03/2017 96 Beach Advisory 0.0 0.6 0.0 0.0 0.6
07/20/2017 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/22/2017 84 Beach Advisory 0.0 0.0 0.0 0.9 0.9
06/08/2017 62 Beach Advisory 0.0 0.0 0.2 0.1 0.3
05/25/2017 10 Acceptable 0.1 0.0 0.0 0.2 0.3
05/11/2017 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/27/2016 30 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2016 30 Acceptable 0.0 0.0 0.4 0.0 0.4
09/15/2016 140 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 170 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/18/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/04/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/14/2016 60 Acceptable 0.0 0.0 0.0 0.0 0.0
06/30/2016 250 Beach Advisory 0.0 0.0 0.3 0.3 0.7
06/16/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/02/2016 20 Acceptable 0.0 0.0 0.0 0.6 0.6
05/19/2016 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2015 41 Acceptable 0.0 0.0 0.0 0.0 0.0
09/24/2015 84 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 269 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/27/2015 1852 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 239 Beach Advisory 0.0 0.0 0.6 0.0 0.6
07/30/2015 1437 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 149 Beach Advisory 0.0 0.0 0.4 0.0 0.4

Entero Count (fecal indicator) and Rainfall Correlation

91 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 below the spillway of Duck Pond. This site is located below the spillway of Duck Pond. The area around Duck Pond is residential, but quite sparsely developed.

Agencies Responsible:

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

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