Water Quality > Tributary and Waterfront Data > Wallkill River > Sparta, NJ- Mohawk Lake source waters

Sparta, NJ- Mohawk Lake source waters

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

18 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
06/09/2018119Beach Advisory0.
10/14/2017166Beach Advisory0.
09/09/2017140Beach Advisory0.
08/12/2017122Beach Advisory0.
10/15/201664Beach Advisory0.
09/17/2016141Beach Advisory0.
08/20/201674Beach Advisory0.
09/26/2015>2420Beach Advisory0.
08/29/2015291Beach Advisory0.

Entero Count (fecal indicator) and Rainfall Correlation

18 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 trained by Riverkeeper, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

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 impounded lake, created in the early 20th century, is the source of the Wallkill River. At the time that the lake was created, the area was used for farming and livestock, and the historical headwaters flowed through pasture. The Mohawk Lake Association now owns the lake and permits Riverkeeper's sampling partners to access the spillway for sampling. There are several swimming beaches along the lakeshore.

Agencies Responsible:


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