Water Quality
Water Quality > Tributary and Waterfront Data > Saw Mill River > Elmsford- Mine Brook tributary

Elmsford- Mine Brook tributary

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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

92 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
09/05/2024 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/22/2024 122 Beach Advisory 0.0 0.0 0.4 2.9 3.3
08/08/2024 1236 Beach Advisory 0.1 2.1 0.0 0.5 2.7
07/25/2024 622 Beach Advisory 0.0 0.1 0.4 0.0 0.6
07/11/2024 554 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/27/2024 5475 Beach Advisory 0.9 0.0 0.0 0.0 0.9
06/13/2024 197 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2024 6131 Beach Advisory 0.3 0.8 0.0 0.9 2.0
05/16/2024 1785 Beach Advisory 0.0 0.3 0.1 0.0 0.4
05/02/2024 30 Acceptable 0.0 0.0 0.1 0.7 0.9
10/19/2023 74 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/05/2023 1616 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/21/2023 193 Beach Advisory 0.0 0.0 0.0 1.5 1.5
09/07/2023 156 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/24/2023 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/10/2023 168 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/27/2023 426 Beach Advisory 0.0 0.0 0.7 0.0 0.7
07/13/2023 908 Beach Advisory 0.0 0.0 0.0 0.5 0.5
06/29/2023 >24196 Beach Advisory 0.0 0.2 0.3 0.9 1.3
06/15/2023 1500 Beach Advisory 0.0 0.6 0.0 0.1 0.7
06/01/2023 41 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2023 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/04/2023 262 Beach Advisory 0.0 0.0 0.1 0.3 0.4
10/27/2022 359 Beach Advisory 0.0 0.0 0.1 0.6 0.7
10/13/2022 30 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2022 120 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/15/2022 359 Beach Advisory 0.0 0.0 1.1 0.3 1.4
09/01/2022 529 Beach Advisory 0.0 0.0 0.2 0.0 0.2
08/18/2022 201 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/04/2022 272 Beach Advisory 0.0 0.0 0.0 0.3 0.3
07/21/2022 457 Beach Advisory 0.0 0.0 0.0 4.8 4.8
10/07/2021 97 Beach Advisory 0.0 0.0 0.0 0.6 0.6
09/23/2021 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/09/2021 4106 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/19/2021 12033 Beach Advisory 0.7 0.0 0.0 0.0 0.7
08/05/2021 231 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/22/2021 294 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/08/2021 496 Beach Advisory 0.0 0.0 0.3 0.0 0.3
06/24/2021 189 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/10/2021 474 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/27/2021 3654 Beach Advisory 0.4 0.0 0.0 0.0 0.4
10/10/2019 259 Beach Advisory 0.0 0.0 0.1 0.4 0.4
09/12/2019 3654 Beach Advisory 0.1 0.0 0.0 0.0 0.2
08/15/2019 73 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/01/2019 1674 Beach Advisory 0.0 1.0 0.0 0.0 1.0
07/02/2019 644 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/20/2019 697 Beach Advisory 0.2 0.0 0.8 0.0 1.0
06/06/2019 122 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 959 Beach Advisory 0.1 0.0 0.0 0.2 0.3
05/09/2019 20 Acceptable 0.0 0.0 0.1 0.0 0.1
10/18/2018 74 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/04/2018 1541 Beach Advisory 0.0 0.0 2.1 0.0 2.1
09/20/2018 336 Beach Advisory 0.0 0.0 0.9 0.0 0.9
09/06/2018 243 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2018 860 Beach Advisory 0.0 1.0 0.0 0.0 1.0
08/09/2018 650 Beach Advisory 0.4 0.0 0.4 0.0 0.8
07/26/2018 1497 Beach Advisory 0.0 1.0 0.0 0.7 1.8
07/12/2018 865 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/14/2018 644 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/31/2018 504 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/17/2018 8664 Beach Advisory 0.2 1.0 0.4 0.0 1.6
10/26/2017 134 Beach Advisory 0.0 0.0 0.4 0.0 0.4
10/12/2017 556 Beach Advisory 0.1 0.0 0.0 0.3 0.4
09/28/2017 160 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2017 108 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/31/2017 85 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/03/2017 960 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2017 504 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 305 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/22/2017 142 Beach Advisory 0.0 0.0 0.0 0.4 0.5
06/08/2017 62 Beach Advisory 0.0 0.0 0.4 0.0 0.4
05/25/2017 2987 Beach Advisory 0.1 0.0 0.0 0.5 0.7
05/11/2017 41 Acceptable 0.0 0.0 0.0 0.0 0.0
10/27/2016 130 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/13/2016 50 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2016 100 Beach Advisory 0.0 0.0 0.5 0.0 0.5
09/15/2016 160 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 700 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/18/2016 930 Beach Advisory 0.1 0.0 0.3 0.0 0.4
08/04/2016 250 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2016 1520 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/30/2016 910 Beach Advisory 0.0 0.0 0.6 0.4 1.1
06/16/2016 620 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2016 230 Beach Advisory 0.0 0.0 0.0 0.7 0.7
05/19/2016 50 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2015 156 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/24/2015 221 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 12997 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/27/2015 256 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 842 Beach Advisory 0.0 0.0 1.1 0.0 1.1
07/30/2015 609 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 315 Beach Advisory 0.0 0.0 1.1 0.0 1.1

Entero Count (fecal indicator) and Rainfall Correlation

92 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 tributary emerges from a tunnel into an office park, where it is ditched and receives surface water runoff through numerous outfalls. This site was tested by Groundworks Hudson Valley's 2008-2012 study.

Agencies Responsible:

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

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