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EWG's Tap Water Database

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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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND20ND
2011ND60ND
2012ND20ND
2013ND20ND
2014ND60ND
2015ND20ND

ppm = parts per million.

State and national drinking water standards and health guidelines

Health Guideline 0.14 ppm

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

ppm = parts per million.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppm = parts per million.

EPA Maximum Contaminant
Level Goal (MCLG)10 ppm

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppm = parts per million.

All test results

Date Lab ID Result
2010-06-21AD40624ND
2010-06-21AD40624ND
2011-02-28AD51145ND
2011-02-28AD51145ND
2011-03-21AD51513ND
2011-03-21AD51513ND
2011-11-30AD62306ND
2011-11-30AD62306ND
2012-11-14AD73182ND
2012-11-14AD73182ND
2013-10-14AD85922ND
2013-10-14AD85922ND
2014-02-24AD89307ND
2014-02-24AD89307ND
2014-03-31AD90303ND
2014-03-31AD90287ND
2014-03-31AD90287ND
2014-03-31AD90303ND
2015-08-3135205088002ND
2015-08-3135205088002ND