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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

City of Kerrville

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0167 ppm61ND - 0.1000 ppm
20130.00500 ppm41ND - 0.0200 ppm
20140.0400 ppm110.0400 ppm
20150.0620 ppm52ND - 0.300 ppm
2016N/A00N/A
2017N/A00N/A

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
2012-04-041204117002ND
2012-04-0412041170010.1000 ppm
2012-07-251207951003ND
2012-07-251207951002ND
2012-07-251207951001ND
2012-10-041210228001ND
2013-01-23AC08472ND
2013-04-11AC16354ND
2013-07-29AC25989ND
2013-07-29AC259850.0200 ppm
2014-10-15AC697020.0400 ppm
2015-01-28AC78026ND
2015-04-15AC88246ND
2015-07-20AD00022ND
2015-07-20AD000180.300 ppm
2015-08-14AD044110.01000 ppm