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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Calcasieu Parish WW District 9 Carlyss

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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND20ND
2016ND80ND
2017ND20ND
2018ND40ND
2019ND60ND

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
2014-02-24AD89307ND
2014-02-24AD89307ND
2014-03-31AD90303ND
2014-03-31AD90287ND
2014-03-31AD90303ND
2014-03-31AD90287ND
2015-08-3135205088002ND
2015-08-3135205088002ND
2016-05-0235242594003ND
2016-05-0235242594007ND
2016-05-0235242594007ND
2016-05-0235242594003ND
2016-11-29AE12025ND
2016-11-29AE12025ND
2016-11-29AE12021ND
2016-11-29AE12021ND
2017-06-1935319492008ND
2017-06-1935319492008ND
2018-09-25B1804632-001ND
2018-09-25B1804632-001ND
2018-10-16B1804946-001ND
2018-10-16B1804946-001ND
2019-07-03B1902888-001ND
2019-07-03B1902888-001ND
2019-10-22B1904760-001ND
2019-10-22B1904760-001ND
2019-10-29B1904818-001ND
2019-10-29B1904818-001ND