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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

City of Torrance Water Department

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

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND20ND
2016ND30ND
2017ND10ND
2018ND90ND
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
2014-02-059588-016-0950ND
2014-02-059588-009-1008ND
2015-03-319588-009-0901ND
2015-03-319588-016-0922ND
2016-02-239588-016-0932ND
2016-03-029588-009-0919ND
2016-06-303761-009-1310ND
2017-01-319588-016-0920ND
2018-01-309588-016-0930ND
2018-02-239588-023-0935ND
2018-02-239588-024-0955ND
2018-06-149588-023-1012ND
2018-06-149588-024-0935ND
2018-08-029588-023-1000ND
2018-08-029588-024-0933ND
2018-11-089588-023-0948ND
2018-11-089588-024-1037ND
2019-01-239588-016-1033ND
2019-01-239588-023-1010ND
2019-01-239588-024-0940ND
2019-05-019588-024-0934ND
2019-08-149588-023-0955ND