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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Cumming

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.310 ppm110.310 ppm
2013ND10ND
20140.340 ppm110.340 ppm
20150.370 ppm110.370 ppm
20160.400 ppm110.400 ppm
20170.440 ppm110.440 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
2012-06-05AH659030.310 ppm
2013-04-25AH99833ND
2014-05-06AI396640.340 ppm
2015-05-07AI765770.370 ppm
2016-05-04AJ115020.400 ppm
2017-05-04AJ547380.440 ppm