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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

Logan City Water System

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.380 ppm550.200 ppm - 0.500 ppm
20130.420 ppm550.200 ppm - 0.500 ppm
20140.400 ppm550.200 ppm - 0.500 ppm
20150.420 ppm550.200 ppm - 0.500 ppm
20160.425 ppm440.200 ppm - 0.500 ppm
20170.359 ppm440.182 ppm - 0.456 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 Result
2012-01-110.400 ppm
2012-01-110.400 ppm
2012-08-150.200 ppm
2012-08-150.500 ppm
2012-08-150.400 ppm
2013-08-060.200 ppm
2013-08-060.500 ppm
2013-08-060.500 ppm
2013-08-060.400 ppm
2013-08-070.500 ppm
2014-11-120.400 ppm
2014-11-120.400 ppm
2014-11-120.500 ppm
2014-11-120.200 ppm
2014-11-120.500 ppm
2015-07-290.500 ppm
2015-07-290.400 ppm
2015-07-290.500 ppm
2015-07-290.500 ppm
2015-07-290.200 ppm
2016-02-260.200 ppm
2016-08-220.500 ppm
2016-08-220.500 ppm
2016-08-220.500 ppm
2017-08-150.406 ppm
2017-08-150.391 ppm
2017-08-150.182 ppm
2017-08-150.456 ppm