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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Slidell Water Supply

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND80ND
2014ND80ND
20150.0378 ppm880.0370 ppm - 0.0390 ppm
20160.00675 ppm82ND - 0.0270 ppm
2017ND80ND

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
2012-10-05AD71545ND
2012-10-05AD71542ND
2012-10-05AD71545ND
2012-10-05AD71544ND
2012-10-05AD71543ND
2012-10-05AD71542ND
2012-10-05AD71544ND
2012-10-05AD71543ND
2013-09-10AD83654ND
2013-09-10AD83659ND
2013-09-10AD83664ND
2013-09-10AD83669ND
2013-09-10AD83669ND
2013-09-10AD83664ND
2013-09-10AD83659ND
2013-09-10AD83654ND
2014-10-21AD98858ND
2014-10-21AD98856ND
2014-10-21AD98857ND
2014-10-21AD98858ND
2014-10-21AD98880ND
2014-10-21AD98880ND
2014-10-21AD98856ND
2014-10-21AD98857ND
2015-09-02352068850040.0380 ppm
2015-09-02352068850030.0370 ppm
2015-09-02352068850020.0370 ppm
2015-09-02352068850010.0390 ppm
2015-09-02352068850040.0380 ppm
2015-09-02352068850030.0370 ppm
2015-09-02352068850020.0370 ppm
2015-09-02352068850010.0390 ppm
2016-09-1235265891003ND
2016-09-1235265891004ND
2016-09-1235265891003ND
2016-09-1235265891002ND
2016-09-12352658910010.0270 ppm
2016-09-1235265891004ND
2016-09-12352658910010.0270 ppm
2016-09-1235265891002ND
2017-10-1935344956001ND
2017-10-1935344956004ND
2017-10-1935344956003ND
2017-10-1935344956002ND
2017-10-1935344956001ND
2017-10-1935344956004ND
2017-10-1935344956003ND
2017-10-1935344956002ND