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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

City of Kerrville

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

40

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0500 ppm72ND - 0.250 ppm
20130.0571 ppm74ND - 0.240 ppm
20140.0217 ppm62ND - 0.0900 ppm
20150.0683 ppm63ND - 0.300 ppm
20160.110 ppm63ND - 0.520 ppm
20170.0725 ppm84ND - 0.350 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2012-01-1812014250010.250 ppm
2012-04-041204117002ND
2012-04-0412041170010.1000 ppm
2012-07-251207951001ND
2012-07-251207951002ND
2012-07-251207951003ND
2012-10-041210228001ND
2013-01-23AC08472ND
2013-01-23AC084870.240 ppm
2013-04-11AC16354ND
2013-07-29AC259850.0200 ppm
2013-07-29AC25989ND
2013-07-29AC259910.0500 ppm
2013-10-17AC323420.0900 ppm
2014-02-10AC418330.0900 ppm
2014-04-07AC49368ND
2014-04-07AC49367ND
2014-07-16AC59796ND
2014-10-15AC69705ND
2014-10-15AC697020.0400 ppm
2015-01-28AC780490.1000 ppm
2015-01-28AC78026ND
2015-04-15AC88246ND
2015-07-20AD00022ND
2015-07-20AD000180.300 ppm
2015-08-14AD044110.01000 ppm
2016-02-01AD20887ND
2016-02-01AD209100.520 ppm
2016-04-18AD33306ND
2016-07-05AD42842ND
2016-10-24AD542220.110 ppm
2016-10-24AD542010.0300 ppm
2017-02-13AD702460.350 ppm
2017-04-06AD786910.01000 ppm
2017-05-08AD82926ND
2017-05-08AD828890.160 ppm
2017-05-08AD82927ND
2017-05-09AD83229ND
2017-05-09AD83227ND
2017-05-09AD832280.0600 ppm