Water Quality > Tributary and Waterfront Data > New York City Waterfront > Gowanus- Gowanus Canal, Butler Street

Gowanus- Gowanus Canal, Butler Street

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

20 Samples taken

Sample Date [i] Enterococcus Count

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.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
SortSortSortSortSortSortSortSort
07/06/2017Acceptable0.00.00.00.50.5
09/29/2016743Beach Advisory0.00.00.20.00.2
09/15/201615531Beach Advisory0.00.60.00.00.6
09/08/2016801Beach Advisory0.00.00.00.00.0
09/01/201610Acceptable0.50.00.00.00.5
08/25/201610Acceptable0.00.00.00.00.0
08/18/2016512Beach Advisory0.00.00.10.00.2
08/11/20161421Beach Advisory0.20.10.00.00.2
08/04/2016594Beach Advisory0.00.00.00.00.0
07/28/201631Acceptable0.00.00.01.01.0
07/21/20161956Beach Advisory0.00.00.00.40.4
07/14/2016813Beach Advisory0.60.00.00.00.6
07/07/20166867Beach Advisory0.00.00.70.51.2
06/30/201624196Beach Advisory0.00.00.10.50.6
06/23/2016>24196Beach Advisory0.00.00.00.00.0
06/16/2016>24196Beach Advisory0.20.00.00.00.2
06/09/201652Acceptable0.00.50.00.91.4
06/02/20163255Beach Advisory0.00.00.01.71.7
05/26/2016823Beach Advisory0.00.00.20.00.2
05/19/2016683Beach Advisory0.00.00.00.00.0

Entero Count (fecal indicator) and Rainfall Correlation

20 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:

Site Coordinator: Skylar Matthews. Site sponsor: Empire Dragon Boat Team NYC. These samples are processed by Queens College (Gregory O'Mullan).

Agencies Responsible:

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

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