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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

L.a. Residential Community Foundation

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.745 ppm220.474 ppm - 1.02 ppm
20130.418 ppm220.407 ppm - 0.429 ppm
2014ND10ND
2015N/A00N/A
2016ND10ND
2017N/A00N/A

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
2012-09-185867-002-13351.02 ppm
2012-09-185867-003-13450.474 ppm
2013-09-245867-002-10350.429 ppm
2013-09-245867-003-10550.407 ppm
2014-09-245867-002-1000ND
2016-09-215867-002-1345ND