Milan (T)- Rock City

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

14 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
09/08/201731Acceptable0.00.30.70.11.1
08/11/201736Acceptable0.40.60.00.00.9
07/14/201748Acceptable0.20.40.80.11.4
06/09/201712Acceptable0.00.00.00.60.6
05/12/201710Acceptable0.00.00.00.00.0
04/14/20175Acceptable0.00.10.00.00.1
03/10/20171Acceptable0.00.10.10.00.2
02/10/20179Acceptable0.00.30.30.00.5
12/14/201612Acceptable0.00.00.00.00.0
11/16/2016183Beach Advisory1.80.00.00.01.8
09/21/201620Acceptable0.00.00.80.00.8
08/19/2016146Beach Advisory0.00.10.00.00.1
07/15/201691Beach Advisory0.00.30.00.00.3
06/17/201611Acceptable0.00.00.00.00.0

Entero Count (fecal indicator) and Rainfall Correlation

14 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 near the intersection of Routes 199 and 308, near a fishing area. A site nearby was monitored by the Sawkill Creek Water Quality Surveillance Program beginning in the 1970's. These samples are collected by Saw Kill Watershed Community members and processed by the Bard Water Lab.

Agencies Responsible:

Dutchess County Dept. of Health: 845-486-3400; NYSDEC Region 3: 845-256-3000

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