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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Salisbury PWS

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0520 ppm110.0520 ppm
20150.140 ppm110.140 ppm
20160.130 ppm110.130 ppm
20170.0790 ppm110.0790 ppm
20180.0900 ppm110.0900 ppm
20190.1000 ppm110.1000 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-06-17AC269140.0520 ppm
2015-07-23AC547540.140 ppm
2016-07-11AC801310.130 ppm
2017-07-12AD017070.0790 ppm
2018-07-09AD286070.0900 ppm
2019-07-09AD521700.1000 ppm