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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Herlong Public Utility District

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.204 ppm220.140 ppm - 0.269 ppm
20150.180 ppm220.140 ppm - 0.219 ppm
2016N/A00N/A
20170.220 ppm220.200 ppm - 0.240 ppm
20180.208 ppm440.130 ppm - 0.270 ppm
20190.245 ppm220.170 ppm - 0.320 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
2014-05-162326-001-08570.269 ppm
2014-05-162326-002-08470.140 ppm
2015-05-182326-001-08240.219 ppm
2015-05-182326-002-08400.140 ppm
2017-08-212326-001-09500.240 ppm
2017-08-212326-002-09300.200 ppm
2018-04-162326-001-08400.250 ppm
2018-04-162326-002-08300.130 ppm
2018-05-072326-001-09350.180 ppm
2018-05-072326-002-09500.270 ppm
2019-04-082326-001-09060.320 ppm
2019-04-082326-002-08520.170 ppm