Water Quality
Water Quality > Tributary and Waterfront Data > East River

East River

Citizen Testing Sites

Water Quality Conditions by Location

Recent Samples Historical Statistics
Site Name (Watershed) Sample Date [i] Entero Count
close

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals.

[i] 4 Days Total Rain (in)
close

4 Days Total Rain (in)

The combined rainfall for the day of sampling, prior day, two days prior and three days prior. More than 1/4 inch is considered a “wet weather sample.”

[i] Number of Samples
close

Number of Samples

Total number of samples included in these calculations.

[i] Geometric
Mean
close

Geometric Mean

A measure of central tendency (a weighted average) used by NYS DEC and the US EPA to assess water quality. The geometric mean is defined as the nth root (where n is the number of samples) of the product of the Enterococcus measurements. A geometric mean over 30 fails the EPA criteria for safe primary contact.

[i] Maximum
close

Maximum

The highest Enterococcus count we have recorded at this site (“>” indicates an unknown number greater than this number and reflects the upper limit of our scoring ability for this sample).

[i] Minimum
close

Minimum

The lowest Enterococcus count we have recorded at this site (“<” indicates an unknown number less than this number and reflects the lower limit of our scoring ability for this sample).

Sort Sort Sort Sort Sort Sort Sort Sort

Individual Entero Counts by Site

Note: multiple counts of the same value will overlap and appear as one dot.

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+)

Geometric Mean*

Acceptable (0–30) Unacceptable (31+)

*Weighted average of multiple
samples; Enterococcus count
per 100mL

SAMPLING PARTNERS

This program is a partnership of Riverkeeper and Dr. Greg O’Mullan, Queens College environmental microbiology professor. Samples are collected by boat by Riverkeeper staff or Queens College students. Samples are processed in Dr. O’Mullan’s lab at Queens College.

As part of this study, Dr. O’Mullan and his students are also collecting temperature, salinity and dissolved oxygen data, to more fully understand the impacts of Combined Sewer Overflows (CSOs) in the East River and its bays and tributaries.

Tell Gov. Hochul to block invasive species at the Erie and Champlain canals
Become a Member

Stay in Touch and Up To Date