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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Porter SUD

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.

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND60ND
2015ND60ND
20160.00200 ppm51ND - 0.01000 ppm
2017ND50ND
2018ND50ND
2019ND50ND

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
2014-03-04AC45414ND
2014-03-04AC45411ND
2014-03-04AC45410ND
2014-03-04AC45415ND
2014-03-04AC45395ND
2014-05-06AC53078ND
2015-04-13AC87895ND
2015-04-13AC87896ND
2015-04-13AC87894ND
2015-04-13AC87892ND
2015-04-13AC87893ND
2015-04-13AC87891ND
2016-01-12AD17443ND
2016-01-12AD17446ND
2016-01-12AD17444ND
2016-01-12AD174450.01000 ppm
2016-01-12AD17470ND
2017-01-19AD65604ND
2017-01-19AD65605ND
2017-01-19AD65603ND
2017-06-26AD87748ND
2017-10-11AE00272ND
2018-01-09AE08232ND
2018-01-09AE08233ND
2018-01-09AE08231ND
2018-01-09AE08229ND
2018-11-26AE46739ND
2019-01-23AE50836ND
2019-01-23AE50827ND
2019-01-23AE50829ND
2019-01-23AE50830ND
2019-01-23AE50828ND