Water Quality
Water Quality > New York City Waterfront > Bayside- Little Neck Bay marina

Bayside- Little Neck Bay marina

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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

134 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
06/13/2024 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/06/2024 404 Beach Advisory 0.8 0.0 0.0 0.0 0.8
05/30/2024 305 Beach Advisory 0.2 0.7 0.0 1.0 1.8
05/23/2024 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2024 2,143 Acceptable 0.3 0.3 0.0 0.0 0.6
09/28/2023 132 Beach Advisory 0.0 0.0 0.1 0.7 0.8
09/21/2023 132 Beach Advisory 0.0 0.0 0.0 1.5 1.5
09/14/2023 160 Beach Advisory 0.0 0.3 0.0 1.2 1.6
09/07/2023 256 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/31/2023 10 Acceptable 0.0 0.2 0.0 0.0 0.2
08/24/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2023 1,439 Acceptable 0.0 0.5 1.2 0.0 1.7
08/10/2023 10 Acceptable 0.0 0.0 0.0 0.9 0.9
07/27/2023 95 Beach Advisory 0.0 0.0 3.7 0.0 3.7
07/20/2023 20 Acceptable 0.0 0.1 1.0 0.0 1.1
07/13/2023 10 Acceptable 0.0 0.0 0.0 0.3 0.3
07/06/2023 135 Beach Advisory 0.0 0.0 0.4 0.8 1.2
06/29/2023 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
06/22/2023 144 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2023 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/25/2023 86 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2022 110 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/22/2022 175 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/15/2022 146 Beach Advisory 0.0 0.0 0.4 0.8 1.2
09/01/2022 63 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/25/2022 75 Beach Advisory 0.0 0.0 0.0 0.2 0.2
08/11/2022 1376 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/04/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/28/2022 1137 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/14/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/07/2022 171 Beach Advisory 0.0 0.0 0.1 0.0 0.1
06/30/2022 256 Beach Advisory 0.0 0.0 0.0 0.3 0.3
06/23/2022 72 Beach Advisory 0.0 0.0 0.1 0.0 0.1
06/16/2022 547 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/09/2022 161 Beach Advisory 0.0 0.0 0.1 0.0 0.1
09/30/2021 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
09/23/2021 91 Beach Advisory 1.4 0.0 0.1 0.0 1.5
09/16/2021 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
09/09/2021 158 Beach Advisory 0.3 0.0 0.0 0.0 0.3
09/02/2021 727 Beach Advisory 0.1 7.1 0.0 0.0 7.2
08/26/2021 63 Beach Advisory 0.0 0.0 0.0 1.1 1.1
08/19/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/12/2021 <10 Acceptable 0.0 0.2 0.8 0.0 1.0
08/05/2021 20 Acceptable 0.0 0.0 0.0 0.0 0.0
07/29/2021 <10 Acceptable 0.0 0.0 0.0 0.8 0.8
07/22/2021 10 Acceptable 0.0 0.1 0.0 0.0 0.1
07/15/2021 <10 Acceptable 0.0 0.0 0.0 1.4 1.4
07/08/2021 <10 Acceptable 0.0 0.0 0.6 0.0 0.6
07/01/2021 <10 Acceptable 0.9 0.7 0.0 0.0 1.6
06/24/2021 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/17/2021 10 Acceptable 0.0 0.0 0.0 0.2 0.2
06/10/2021 10 Acceptable 0.0 0.0 0.5 0.1 0.6
06/03/2021 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/26/2019 20 Acceptable 0.0 0.0 0.1 0.0 0.1
09/12/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/05/2019 86 Beach Advisory 0.0 0.0 0.0 0.3 0.3
08/29/2019 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
08/22/2019 10 Acceptable 0.0 0.1 0.0 0.0 0.1
08/15/2019 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
08/08/2019 52 Acceptable 0.2 1.2 0.0 0.0 1.4
07/18/2019 3,654 Acceptable 0.5 1.8 0.0 0.0 2.3
07/11/2019 <10 Acceptable 0.8 0.0 0.0 0.0 0.8
06/27/2019 97 Beach Advisory 0.0 0.0 0.9 0.0 0.9
06/20/2019 663 Beach Advisory 0.0 0.1 0.7 0.0 0.8
06/13/2019 110 Beach Advisory 0.0 0.0 0.5 0.6 1.1
06/06/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/30/2019 2359 Beach Advisory 0.0 0.8 0.2 0.0 1.0
05/23/2019 130 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/04/2018 10 Acceptable 0.0 0.0 0.7 0.0 0.7
09/27/2018 63 Beach Advisory 0.0 0.2 2.0 0.0 2.2
09/20/2018 231 Beach Advisory 0.0 0.0 1.2 0.0 1.2
09/13/2018 435 Beach Advisory 0.1 0.2 0.0 0.9 1.2
09/06/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/30/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2018 <10 Acceptable 0.0 0.7 0.1 0.0 0.8
08/16/2018 <10 Acceptable 0.0 0.8 0.7 0.0 1.5
08/09/2018 318 Beach Advisory 0.6 0.0 0.3 0.0 0.9
08/02/2018 63 Beach Advisory 0.0 0.1 0.0 0.4 0.5
07/26/2018 10 Acceptable 0.0 0.7 0.0 0.2 0.9
07/12/2018 41 Acceptable 0.0 0.0 0.0 0.0 0.0
07/05/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/28/2018 243 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/21/2018 52 Acceptable 0.0 0.1 0.1 0.1 0.2
06/14/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/07/2018 10 Acceptable 0.0 0.0 0.0 0.2 0.2
05/31/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/24/2018 10 Acceptable 0.0 0.3 0.3 0.0 0.6
09/28/2017 41 Acceptable 0.0 0.0 0.0 0.0 0.0
09/21/2017 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
09/14/2017 86 Beach Advisory 0.0 0.1 0.0 0.0 0.1
09/07/2017 98 Beach Advisory 0.0 0.4 0.0 0.0 0.4
08/31/2017 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
08/24/2017 30 Acceptable 0.0 0.0 0.3 0.0 0.3
08/10/2017 <10 Acceptable 0.0 0.0 0.0 0.8 0.8
08/03/2017 52 Acceptable 0.0 0.1 0.0 0.0 0.1
07/27/2017 <10 Acceptable 0.0 0.0 0.0 0.7 0.7
07/20/2017 84 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/13/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/06/2017 52 Acceptable 0.0 0.0 0.0 0.5 0.5
06/29/2017 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/22/2017 41 Acceptable 0.0 0.0 0.0 1.4 1.4
06/15/2017 132 Beach Advisory 0.0 0.3 0.0 0.0 0.3
06/08/2017 30 Acceptable 0.0 0.0 0.1 0.0 0.1
06/01/2017 <10 Acceptable 0.0 0.0 0.1 0.1 0.2
05/25/2017 10 Acceptable 0.1 0.0 0.0 0.6 0.8
05/18/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/29/2016 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
09/22/2016 <10 Acceptable 0.0 0.0 0.0 0.7 0.7
09/15/2016 41 Acceptable 0.0 0.6 0.0 0.0 0.6
09/08/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/01/2016 <10 Acceptable 0.5 0.0 0.0 0.0 0.5
08/25/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/11/2016 10 Acceptable 0.2 0.1 0.0 0.0 0.2
08/04/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/28/2016 10 Acceptable 0.0 0.0 0.0 1.0 1.0
07/21/2016 52 Acceptable 0.0 0.0 0.0 0.4 0.4
07/14/2016 <10 Acceptable 0.6 0.0 0.0 0.0 0.6
07/07/2016 <10 Acceptable 0.0 0.0 0.7 0.5 1.2
06/30/2016 <10 Acceptable 0.0 0.0 0.1 0.5 0.6
06/23/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 <10 Acceptable 0.2 0.0 0.0 0.0 0.2
06/09/2016 <10 Acceptable 0.0 0.5 0.0 0.0 0.5
06/02/2016 <10 Acceptable 0.0 0.0 0.0 1.7 1.7
05/26/2016 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
05/19/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/01/2015 <10 Acceptable 0.1 1.3 0.1 0.0 1.5
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 <10 Acceptable 1.6 0.0 0.0 0.0 1.6
09/03/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/27/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2015 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
08/13/2015 <10 Acceptable 0.0 0.0 1.2 0.0 1.2
08/06/2015 <10 Acceptable 0.0 0.0 0.4 0.0 0.4

Entero Count (fecal indicator) and Rainfall Correlation

134 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 the New York Botanical Garden towards the end of the Waterfall Trail that runs along the Bronx River, just upstream of a small waterfall. Botanical Garden visitors may kayak upstream of the site. Although there are no combined sewer overflow outfalls upstream of the sampling site in New York City, numerous Westchester County sewage outfalls discharge into the Bronx River. This site is no longer actively sampled. NYC WTA Partners: McGillis Lab/Columbia Earth Institutue (sampling and lab analysis), Bronx River Alliance, New York Botanical Gardens; Site Coordinator: Rebecca Gibson

Agencies Responsible:

NYCDEP: 212-639-9675; NYSDEC Region 2: 718-482-4933