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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Mustang

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.

 

5

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.760 ppm110.760 ppm
2013N/A00N/A
2014ND10ND
20150.620 ppm110.620 ppm
20160.300 ppm110.300 ppm
20170.504 ppm110.504 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
2012-05-0212050940.760 ppm
2014-08-121325546ND
2015-03-185C18118-010.620 ppm
2016-06-226F22066-010.300 ppm
2017-05-177E17087-010.504 ppm