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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

PUD #1 of Asotin County

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.370 ppm85ND - 1.62 ppm
20130.270 ppm63ND - 0.692 ppm
20140.433 ppm63ND - 1.62 ppm
20150.245 ppm63ND - 0.691 ppm
20160.259 ppm63ND - 0.698 ppm
20170.359 ppm63ND - 1.40 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
2012-08-21749161.62 ppm
2012-08-2174918ND
2012-08-21749200.694 ppm
2012-08-2174922ND
2012-08-21749240.167 ppm
2012-08-2174926ND
2012-08-22749430.305 ppm
2012-08-22749440.174 ppm
2013-08-2888154ND
2013-08-28881530.251 ppm
2013-08-2888152ND
2013-08-28881510.692 ppm
2013-08-28881500.676 ppm
2013-09-1889329ND
2014-08-0750032ND
2014-08-07500350.283 ppm
2014-08-0750034ND
2014-08-07500330.695 ppm
2014-08-07500311.62 ppm
2014-08-0750036ND
2015-05-2160387ND
2015-05-21603850.592 ppm
2015-05-2160383ND
2015-05-21603810.691 ppm
2015-05-2160380ND
2015-05-21603790.189 ppm
2016-06-09ND
2016-06-090.688 ppm
2016-06-09ND
2016-06-090.167 ppm
2016-06-090.698 ppm
2016-06-09ND
2017-06-201.40 ppm
2017-06-20ND
2017-06-200.539 ppm
2017-06-20ND
2017-06-200.217 ppm
2017-06-20ND