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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Williamson Town WD

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.350 ppm110.350 ppm
20150.370 ppm110.370 ppm
20160.500 ppm110.500 ppm
20170.330 ppm110.330 ppm
20180.280 ppm110.280 ppm
20190.410 ppm110.410 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
2014-05-151406794-001-N0.350 ppm
2015-02-121501968-001-NIT0.370 ppm
2016-03-171603818-001-NIT0.500 ppm
2017-05-251707694-001-NIT0.330 ppm
2018-05-101807123-001-NIT0.280 ppm
2019-05-091906803-001-NIT0.410 ppm