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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Town of Iota 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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND20ND
2014ND20ND
2015ND60ND
20160.0440 ppm220.0440 ppm
20170.0610 ppm220.0610 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
2012-06-25AD66822ND
2012-06-25AD66822ND
2012-07-09AD67339ND
2012-07-09AD67344ND
2012-07-09AD67344ND
2012-07-09AD67339ND
2013-08-05AD81910ND
2013-08-05AD81910ND
2014-09-29AD97996ND
2014-09-29AD97996ND
2015-08-0335200643003ND
2015-08-0335200643002ND
2015-08-0335200643001ND
2015-08-0335200643002ND
2015-08-0335200643003ND
2015-08-0335200643001ND
2016-08-02352582500060.0440 ppm
2016-08-02352582500060.0440 ppm
2017-02-03352937580110.0610 ppm
2017-02-03352937580110.0610 ppm