Water Quality
Water Quality > Tributary and Waterfront Data > Saw Mill River > Yonkers Paddling and Rowing Club

Yonkers Paddling and Rowing Club

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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

186 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 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/21/2023 20 Acceptable 0.0 0.0 0.5 0.8 1.3
09/07/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2023 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2023 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/10/2023 41 Acceptable 0.0 0.0 0.2 0.7 0.9
07/27/2023 10 Acceptable 0.0 0.0 0.7 0.0 0.7
07/13/2023 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/29/2023 749 Beach Advisory 0.0 0.0 0.1 0.5 0.6
06/15/2023 1989 Beach Advisory 0.0 0.2 0.0 0.1 0.3
06/01/2023 106 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/18/2023 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/04/2023 520 Beach Advisory 0.1 0.0 0.0 0.0 0.1
10/27/2022 52 Acceptable 0.0 0.0 0.1 0.5 0.5
10/13/2022 31 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2022 52 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2022 62 Beach Advisory 0.0 0.0 0.6 0.2 0.8
09/01/2022 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
08/18/2022 <10 Acceptable 0.0 0.2 0.0 0.0 0.2
08/05/2022 31 Acceptable 0.0 0.0 0.0 0.2 0.2
07/21/2022 160 Beach Advisory 0.0 0.0 0.0 4.8 4.8
07/07/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/23/2022 20 Acceptable 0.5 0.1 0.0 0.0 0.6
06/09/2022 3076 Beach Advisory 3.1 0.1 0.0 0.0 3.2
05/26/2022 10 Acceptable 0.0 0.0 0.0 0.2 0.2
05/12/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2021 41 Acceptable 0.0 0.0 0.0 0.0 0.0
10/07/2021 602 Beach Advisory 0.0 0.0 0.2 0.5 0.7
09/23/2021 31 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2021 303 Beach Advisory 0.4 0.0 0.0 0.0 0.4
08/19/2021 768 Beach Advisory 0.2 0.0 0.0 0.0 0.2
08/05/2021 20 Acceptable 0.0 0.0 0.0 0.0 0.0
07/22/2021 20 Acceptable 0.0 0.1 0.0 0.0 0.2
07/08/2021 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
06/24/2021 52 Acceptable 0.0 0.0 0.3 0.0 0.3
06/10/2021 683 Beach Advisory 0.0 0.0 0.8 0.3 1.1
05/27/2021 199 Beach Advisory 0.1 0.0 0.0 0.0 0.1
05/13/2021 10 Acceptable 0.0 0.0 0.0 0.1 0.1
10/24/2019 20 Acceptable 0.0 0.2 0.5 0.0 0.7
10/10/2019 52 Acceptable 0.0 0.6 0.1 0.8 1.4
09/26/2019 30 Acceptable 0.0 0.0 0.0 0.0 0.1
09/12/2019 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2019 41 Acceptable 0.0 0.0 0.0 0.0 0.0
08/01/2019 97 Beach Advisory 0.0 0.9 0.0 0.0 1.0
07/02/2019 31 Acceptable 0.0 0.0 0.0 0.0 0.0
06/20/2019 169 Beach Advisory 0.0 0.0 0.3 0.0 0.4
06/06/2019 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 63 Beach Advisory 0.1 0.0 0.0 0.2 0.3
05/09/2019 97 Beach Advisory 0.0 0.0 0.1 0.0 0.1
10/18/2018 97 Beach Advisory 0.0 0.0 0.1 0.1 0.1
10/04/2018 432 Beach Advisory 0.0 0.0 0.8 0.0 0.8
10/04/2018 432 Beach Advisory 0.0 0.0 0.7 0.0 0.7
09/20/2018 85 Beach Advisory 0.0 0.0 1.1 0.0 1.1
09/20/2018 85 Beach Advisory 0.0 0.0 1.2 0.0 1.2
09/06/2018 108 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/06/2018 108 Beach Advisory 0.4 0.0 0.0 0.0 0.4
08/23/2018 221 Beach Advisory 0.0 1.1 0.0 0.0 1.1
08/23/2018 221 Beach Advisory 0.0 0.7 0.1 0.0 0.8
08/09/2018 108 Beach Advisory 0.4 0.0 0.2 0.0 0.6
08/09/2018 108 Beach Advisory 0.6 0.0 0.1 0.0 0.7
07/26/2018 402 Beach Advisory 0.1 0.8 0.0 0.3 1.2
07/26/2018 407 Beach Advisory 0.0 0.7 0.0 0.2 1.0
07/12/2018 20 Acceptable 0.0 0.0 0.0 0.0 0.0
07/12/2018 20 Acceptable 0.7 0.0 0.0 0.0 0.7
06/28/2018 14136 Beach Advisory 0.8 0.0 0.0 0.0 0.8
06/28/2018 14136 Beach Advisory 1.4 0.0 0.0 0.0 1.4
06/14/2018 31 Acceptable 0.0 0.1 0.0 0.0 0.1
06/14/2018 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/31/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/17/2018 865 Beach Advisory 0.2 0.6 0.4 0.0 1.3
10/26/2017 2489 Beach Advisory 0.0 0.0 0.2 0.0 0.2
10/12/2017 96 Beach Advisory 0.2 0.0 0.0 0.2 0.4
09/28/2017 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2017 703 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/31/2017 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
08/03/2017 63 Beach Advisory 0.0 0.3 0.0 0.0 0.3
07/20/2017 20 Acceptable 0.0 0.0 0.0 0.0 0.0
07/06/2017 20 Acceptable 0.0 0.0 0.1 0.0 0.1
06/22/2017 96 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/15/2017 10 Acceptable 0.0 0.3 0.0 0.0 0.3
06/08/2017 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/25/2017 73 Beach Advisory 0.6 0.1 0.0 0.5 1.1
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 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2016 190 Beach Advisory 0.0 0.0 0.3 0.0 0.3
09/22/2016 10 Acceptable 0.0 0.0 0.0 0.5 0.5
09/15/2016 150 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/08/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/01/2016 1840 Beach Advisory 0.1 0.0 0.0 0.0 0.1
09/01/2016 60 Acceptable 0.1 0.0 0.0 0.0 0.1
08/25/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 60 Acceptable 0.0 0.1 0.9 0.0 0.9
08/11/2016 84 Beach Advisory 0.0 0.5 0.0 0.0 0.5
08/04/2016 40 Acceptable 0.0 0.0 0.0 0.0 0.0
07/28/2016 10 Acceptable 0.0 0.0 0.0 0.2 0.2
07/14/2016 50 Acceptable 0.2 0.0 0.0 0.0 0.2
07/07/2016 <10 Acceptable 0.0 0.0 0.7 0.1 0.8
06/30/2016 110 Beach Advisory 0.0 0.0 0.5 0.3 0.8
06/23/2016 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 180 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/16/2016 180 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/09/2016 327 Beach Advisory 1.0 0.4 0.0 0.0 1.4
06/02/2016 70 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/26/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/19/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2015 31 Acceptable 0.0 0.0 0.0 0.0 0.0
10/01/2015 884 Beach Advisory 0.0 1.2 0.0 0.0 1.2
09/24/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2015 759 Beach Advisory 0.9 0.0 0.0 0.0 0.9
09/03/2015 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/27/2015 97 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/20/2015 51 Acceptable 0.0 0.0 0.0 0.0 0.0
08/13/2015 10 Acceptable 0.0 0.0 0.7 0.0 0.7
08/06/2015 31 Acceptable 0.0 0.0 0.1 0.0 0.1
07/30/2015 41 Acceptable 0.0 0.0 0.0 0.0 0.0
07/23/2015 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
07/16/2015 259 Beach Advisory 0.0 0.0 1.5 0.0 1.5
07/09/2015 383 Beach Advisory 0.0 0.5 0.0 0.0 0.5
07/01/2015 454 Beach Advisory 0.5 0.0 0.0 0.3 0.9
06/25/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/18/2015 52 Acceptable 0.0 0.0 0.1 0.2 0.4
06/11/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/04/2015 197 Beach Advisory 0.0 0.0 0.0 0.2 0.2
05/28/2015 246 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/21/2015 31 Acceptable 0.0 0.0 0.1 0.0 0.1
10/02/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/25/2014 30 Acceptable 0.3 0.0 0.0 0.0 0.3
09/18/2014 10 Acceptable 0.0 0.0 0.4 0.0 0.4
09/11/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/04/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/28/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2014 <10 Acceptable 0.4 0.0 0.0 0.0 0.4
08/14/2014 238 Beach Advisory 0.0 0.5 0.2 0.0 0.7
08/07/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/31/2014 98 Beach Advisory 0.0 0.0 0.0 0.2 0.2
07/24/2014 110 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/17/2014 288 Beach Advisory 0.0 0.0 1.3 0.5 1.8
07/10/2014 20 Acceptable 0.0 0.1 0.4 0.0 0.5
07/02/2014 10 Acceptable 1.0 0.0 0.0 0.0 1.0
06/26/2014 495 Beach Advisory 0.1 0.1 0.0 0.0 0.2
06/19/2014 52 Acceptable 0.2 0.0 0.0 0.0 0.2
06/12/2014 183 Beach Advisory 0.1 0.0 0.0 1.6 1.7
06/05/2014 >24196 Beach Advisory 0.9 0.0 0.1 0.0 1.0
05/29/2014 85 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/22/2014 683 Beach Advisory 0.2 0.0 0.0 0.0 0.2
10/03/2013 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/26/2013 31 Acceptable 0.0 0.0 0.0 0.0 0.0
09/19/2013 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/12/2013 <10 Acceptable 1.6 0.0 0.0 0.0 1.6
08/29/2013 41 Acceptable 0.0 0.4 0.0 0.0 0.5
08/22/2013 20 Acceptable 0.3 0.0 0.0 0.0 0.3
08/15/2013 63 Beach Advisory 0.0 0.0 0.9 0.1 0.9
08/08/2013 52 Acceptable 0.5 0.0 0.0 0.0 0.5
08/01/2013 110 Beach Advisory 0.7 0.0 0.0 0.0 0.7
07/25/2013 107 Beach Advisory 0.0 0.0 0.3 0.1 0.4
07/18/2013 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/11/2013 12997 Beach Advisory 0.0 0.0 0.2 0.2 0.5
07/02/2013 4611 Beach Advisory 0.1 0.8 0.0 0.0 0.9
06/27/2013 120 Beach Advisory 0.2 0.1 0.0 0.0 0.3
06/20/2013 31 Acceptable 0.0 0.0 0.2 0.0 0.2
06/13/2013 121 Beach Advisory 1.3 0.0 0.1 1.4 2.7
06/06/2013 73 Beach Advisory 0.1 0.0 0.0 0.9 1.0
05/23/2013 121 Beach Advisory 1.8 0.0 0.0 0.0 1.8
09/27/2012 30 Acceptable 0.1 0.0 0.0 0.0 0.1
09/20/2012 121 Beach Advisory 0.0 0.0 1.5 0.0 1.5
09/13/2012 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/06/2012 31 Acceptable 0.0 0.1 0.1 0.0 0.2
08/30/2012 41 Acceptable 0.0 0.0 0.1 0.6 0.8
08/23/2012 183 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/16/2012 74 Beach Advisory 0.0 0.6 0.0 0.0 0.6
08/09/2012 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/26/2012 30 Acceptable 0.6 0.0 0.0 0.2 0.8
07/19/2012 98 Beach Advisory 0.0 1.8 0.0 0.0 1.8
07/12/2012 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/05/2012 20 Acceptable 0.0 0.1 0.0 0.0 0.1
06/07/2012 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
05/31/2012 20 Acceptable 0.0 0.0 0.2 0.0 0.2
05/24/2012 52 Acceptable 1.0 0.0 0.2 1.4 2.6
05/17/2012 <10 Acceptable 0.0 0.1 0.5 0.0 0.6
11/21/2011 34 Acceptable 0.1 0.0 0.0 0.0 0.1
11/09/2011 91 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/27/2011 133 Beach Advisory 0.6 0.0 0.0 0.0 0.6
10/20/2011 344 Beach Advisory 0.0 1.1 0.0 0.0 1.1

Entero Count (fecal indicator) and Rainfall Correlation

186 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 site is located in downtown Yonkers next to the Center for the Urban River at Beczak. There are several Combined Sewer Overflor outfalls nearby. Partners: Jerry Blackstone (sponsor), Yonkers Paddling & Rowing Club, Sarah Lawrence College Center for the Urban River at Beczak (lab analysis); Site Coordinators: Jerry Blackstone and Robert Hothan

Agencies Responsible:

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

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