Water Quality
Water Quality > Saw Mill River > Greenburgh- Rum Brook Park ballfields

Greenburgh- Rum Brook Park ballfields

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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

94 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
10/03/2024 183 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/19/2024 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/05/2024 158 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/22/2024 259 Beach Advisory 0.0 0.0 0.4 2.9 3.3
07/25/2024 301 Beach Advisory 0.0 0.1 0.4 0.0 0.6
07/11/2024 345 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/27/2024 6131 Beach Advisory 0.9 0.0 0.0 0.0 0.9
06/13/2024 323 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2024 >24196 Beach Advisory 0.3 0.8 0.0 0.9 2.0
05/16/2024 2495 Beach Advisory 0.0 0.3 0.1 0.0 0.4
05/02/2024 75 Beach Advisory 0.0 0.0 0.1 0.7 0.9
10/19/2023 85 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/05/2023 195 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/21/2023 231 Beach Advisory 0.0 0.0 0.0 1.5 1.5
08/24/2023 241 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/10/2023 134 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/27/2023 529 Beach Advisory 0.0 0.0 0.7 0.0 0.7
07/13/2023 414 Beach Advisory 0.0 0.0 0.0 0.5 0.5
06/29/2023 480 Beach Advisory 0.0 0.2 0.3 0.9 1.3
06/15/2023 10462 Beach Advisory 0.0 0.6 0.0 0.1 0.7
06/01/2023 97 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/18/2023 52 Acceptable 0.0 0.0 0.0 0.0 0.0
05/04/2023 41 Acceptable 0.0 0.0 0.1 0.3 0.4
10/13/2022 145 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2022 74 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/15/2022 265 Beach Advisory 0.0 0.0 1.1 0.3 1.4
09/01/2022 145 Beach Advisory 0.0 0.0 0.2 0.0 0.2
08/18/2022 62 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/04/2022 301 Beach Advisory 0.0 0.0 0.0 0.3 0.3
07/21/2022 435 Beach Advisory 0.0 0.0 0.0 4.8 4.8
10/21/2021 173 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/07/2021 450 Beach Advisory 0.0 0.0 0.0 0.6 0.6
09/23/2021 256 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/09/2021 3441 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/05/2021 211 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/22/2021 292 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/08/2021 488 Beach Advisory 0.0 0.0 0.3 0.0 0.3
06/24/2021 262 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/10/2021 813 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/27/2021 5172 Beach Advisory 0.4 0.0 0.0 0.0 0.4
05/13/2021 86 Beach Advisory 0.0 0.0 0.0 0.2 0.2
10/24/2019 512 Beach Advisory 0.0 0.0 0.5 0.0 0.5
10/10/2019 2187 Beach Advisory 0.0 0.0 0.1 0.4 0.4
09/26/2019 169 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/12/2019 2489 Beach Advisory 0.1 0.0 0.0 0.0 0.2
08/15/2019 3282 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/01/2019 7270 Beach Advisory 0.0 1.0 0.0 0.0 1.0
07/02/2019 350 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/20/2019 723 Beach Advisory 0.2 0.0 0.8 0.0 1.0
06/06/2019 388 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 1112 Beach Advisory 0.1 0.0 0.0 0.2 0.3
05/09/2019 120 Beach Advisory 0.0 0.0 0.1 0.0 0.1
10/18/2018 292 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/04/2018 2310 Beach Advisory 0.0 0.0 2.1 0.0 2.1
09/20/2018 657 Beach Advisory 0.0 0.0 0.9 0.0 0.9
09/06/2018 379 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2018 1607 Beach Advisory 0.0 1.0 0.0 0.0 1.0
08/09/2018 5172 Beach Advisory 0.4 0.0 0.4 0.0 0.8
07/26/2018 3255 Beach Advisory 0.0 1.0 0.0 0.7 1.8
07/12/2018 794 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/14/2018 771 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/31/2018 305 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 262 Beach Advisory 0.0 0.0 0.4 0.0 0.4
10/12/2017 2310 Beach Advisory 0.1 0.0 0.0 0.3 0.4
09/28/2017 266 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2017 226 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/31/2017 160 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/03/2017 17329 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2017 512 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 441 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/22/2017 383 Beach Advisory 0.0 0.0 0.0 0.4 0.5
06/08/2017 181 Beach Advisory 0.0 0.0 0.4 0.0 0.4
05/25/2017 1137 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 150 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/13/2016 170 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 460 Beach Advisory 0.0 0.0 0.5 0.0 0.5
09/15/2016 550 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 490 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/18/2016 1780 Beach Advisory 0.1 0.0 0.3 0.0 0.4
08/04/2016 310 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2016 8160 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/30/2016 1620 Beach Advisory 0.0 0.0 0.6 0.4 1.1
06/16/2016 1610 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2016 390 Beach Advisory 0.0 0.0 0.0 0.7 0.7
05/19/2016 140 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/08/2015 609 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/24/2015 350 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 19863 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/27/2015 355 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 1153 Beach Advisory 0.0 0.0 1.1 0.0 1.1
07/30/2015 910 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 435 Beach Advisory 0.0 0.0 1.1 0.0 1.1

Entero Count (fecal indicator) and Rainfall Correlation

94 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:

At this location, the Saw Mill River parallels the Rum Brook Park ballfields, although a buffer of trees and vegetation shields the river from view at the site.

Agencies Responsible:

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