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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Holmesville Water System

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.

MORE ABOUT THIS CONTAMINANT

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
20170.0190 ppm42ND - 0.0380 ppm
2018ND60ND
2019ND40ND

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
2014-10-22AD98851ND
2014-10-22AD98850ND
2014-10-22AD98851ND
2014-10-22AD98850ND
2015-06-0335191711004ND
2015-06-0335191711004ND
2015-06-0335191711005ND
2015-06-0335191711005ND
2016-09-2935270131003ND
2016-09-2935270131002ND
2016-09-2935270131003ND
2016-09-2935270131002ND
2017-03-10353012040070.0380 ppm
2017-03-1035301204008ND
2017-03-10353012040070.0380 ppm
2017-03-1035301204008ND
2018-03-1935381286001ND
2018-03-1935381286002ND
2018-03-1935381286003ND
2018-03-1935381286001ND
2018-03-1935381286002ND
2018-03-1935381286003ND
2019-03-1435457377001ND
2019-03-1435457377002ND
2019-03-1435457377001ND
2019-03-1435457377002ND