EWG's Tap Water Database — 2019 UPDATE



United Wappinger Water Improvement District

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20120.860 ppm220.310 ppm - 1.41 ppm
20131.01 ppm440.320 ppm - 1.61 ppm
20140.961 ppm220.421 ppm - 1.50 ppm
20160.333 ppm220.214 ppm - 0.451 ppm
20170.455 ppm220.410 ppm - 0.500 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2012-12-05HH122230B0.310 ppm
2012-12-05AT122234B1.41 ppm
2013-06-05MB13982C1.61 ppm
2013-06-05MB13985C0.320 ppm
2013-12-04HT132307B0.590 ppm
2013-12-04AT132302C1.51 ppm
2014-12-0912101426A1.50 ppm
2014-12-0912101427A0.421 ppm
2016-11-29UW164141A0.214 ppm
2016-11-30UW164250A0.451 ppm
2017-11-28UW172960A0.500 ppm
2017-11-28UW172957A0.410 ppm