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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Griffin

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

16

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0333 ppm61ND - 0.200 ppm
20130.120 ppm21ND - 0.240 ppm
2014ND20ND
2015ND20ND
20160.145 ppm21ND - 0.290 ppm
20170.105 ppm21ND - 0.210 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2012-02-08AH530990.200 ppm
2012-05-01AH57802ND
2012-07-11AH69819ND
2012-09-12AH77781ND
2012-09-17AH78545ND
2012-10-09AH81428ND
2013-08-28AI135340.240 ppm
2013-09-17AI15917ND
2014-09-03AI52360ND
2014-09-09AI53127ND
2015-08-31AI88179ND
2015-09-01AI88485ND
2016-08-29AJ24641ND
2016-09-01AJ253880.290 ppm
2017-08-09AJ636180.210 ppm
2017-10-24AJ72355ND