Water Quality
Water Quality > Saw Mill River > Greenburgh- Rum Brook tributary

Greenburgh- Rum 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

93 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 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/19/2024 233 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/05/2024 183 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/22/2024 368 Beach Advisory 0.0 0.0 0.4 2.9 3.3
07/25/2024 1137 Beach Advisory 0.0 0.1 0.4 0.0 0.6
07/11/2024 1616 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/27/2024 24196 Beach Advisory 0.9 0.0 0.0 0.0 0.9
06/13/2024 583 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2024 15531 Beach Advisory 0.3 0.8 0.0 0.9 2.0
05/16/2024 987 Beach Advisory 0.0 0.3 0.1 0.0 0.4
05/02/2024 85 Beach Advisory 0.0 0.0 0.1 0.7 0.9
10/19/2023 331 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/05/2023 241 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 292 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/10/2023 512 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/27/2023 627 Beach Advisory 0.0 0.0 0.7 0.0 0.7
07/13/2023 708 Beach Advisory 0.0 0.0 0.0 0.5 0.5
06/29/2023 622 Beach Advisory 0.0 0.2 0.3 0.9 1.3
06/15/2023 1989 Beach Advisory 0.0 0.6 0.0 0.1 0.7
06/01/2023 295 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/18/2023 41 Acceptable 0.0 0.0 0.0 0.0 0.0
05/04/2023 132 Beach Advisory 0.0 0.0 0.1 0.3 0.4
10/13/2022 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2022 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/15/2022 355 Beach Advisory 0.0 0.0 1.1 0.3 1.4
09/01/2022 496 Beach Advisory 0.0 0.0 0.2 0.0 0.2
08/18/2022 399 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/04/2022 583 Beach Advisory 0.0 0.0 0.0 0.3 0.3
07/21/2022 1187 Beach Advisory 0.0 0.0 0.0 4.8 4.8
10/21/2021 158 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/07/2021 350 Beach Advisory 0.0 0.0 0.0 0.6 0.6
09/23/2021 638 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/09/2021 9208 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/05/2021 480 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/22/2021 677 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/08/2021 1112 Beach Advisory 0.0 0.0 0.3 0.0 0.3
06/24/2021 455 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/10/2021 1160 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/13/2021 52 Acceptable 0.0 0.0 0.0 0.2 0.2
10/24/2019 173 Beach Advisory 0.0 0.0 0.5 0.0 0.5
10/10/2019 414 Beach Advisory 0.0 0.0 0.1 0.4 0.4
09/26/2019 216 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/12/2019 1850 Beach Advisory 0.1 0.0 0.0 0.0 0.2
08/15/2019 4106 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/01/2019 4786 Beach Advisory 0.0 1.0 0.0 0.0 1.0
07/02/2019 256 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/20/2019 487 Beach Advisory 0.2 0.0 0.8 0.0 1.0
06/06/2019 359 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 5475 Beach Advisory 0.1 0.0 0.0 0.2 0.3
05/09/2019 98 Beach Advisory 0.0 0.0 0.1 0.0 0.1
10/18/2018 121 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/04/2018 985 Beach Advisory 0.0 0.0 2.1 0.0 2.1
09/20/2018 1106 Beach Advisory 0.0 0.0 0.9 0.0 0.9
09/06/2018 1145 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2018 2064 Beach Advisory 0.0 1.0 0.0 0.0 1.0
08/09/2018 12997 Beach Advisory 0.4 0.0 0.4 0.0 0.8
07/26/2018 12997 Beach Advisory 0.0 1.0 0.0 0.7 1.8
07/12/2018 1296 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/14/2018 683 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/31/2018 328 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/17/2018 7270 Beach Advisory 0.2 1.0 0.4 0.0 1.6
10/26/2017 63 Beach Advisory 0.0 0.0 0.4 0.0 0.4
10/12/2017 420 Beach Advisory 0.1 0.0 0.0 0.3 0.4
09/28/2017 605 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2017 253 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/31/2017 250 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/03/2017 1334 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2017 487 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 602 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/22/2017 459 Beach Advisory 0.0 0.0 0.0 0.4 0.5
06/08/2017 120 Beach Advisory 0.0 0.0 0.4 0.0 0.4
05/25/2017 2489 Beach Advisory 0.1 0.0 0.0 0.5 0.7
05/11/2017 158 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/27/2016 40 Acceptable 0.0 0.0 0.0 0.1 0.1
10/13/2016 110 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 130 Beach Advisory 0.0 0.0 0.5 0.0 0.5
09/15/2016 2600 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 800 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/18/2016 2760 Beach Advisory 0.1 0.0 0.3 0.0 0.4
08/04/2016 290 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2016 6870 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/30/2016 1480 Beach Advisory 0.0 0.0 0.6 0.4 1.1
06/16/2016 820 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2016 490 Beach Advisory 0.0 0.0 0.0 0.7 0.7
05/19/2016 120 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/08/2015 393 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/24/2015 443 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 24196 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/27/2015 933 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 1658 Beach Advisory 0.0 0.0 1.1 0.0 1.1
07/30/2015 1607 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 1043 Beach Advisory 0.0 0.0 1.1 0.0 1.1

Entero Count (fecal indicator) and Rainfall Correlation

93 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:

The Rum Brook drains a mixed land-cover watershed that includes sections of woodland, residential and commercial development, utility right-of-way, and recreational areas including a golf course.

Agencies Responsible:

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