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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Rocky Branch Water System

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND80ND
2014ND80ND
20150.0180 ppm84ND - 0.0420 ppm
2016ND80ND
2017ND80ND

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
2012-10-26AD72744ND
2012-10-26AD72743ND
2012-10-26AD72744ND
2012-10-26AD72743ND
2012-12-14AD74329ND
2012-12-14AD74329ND
2012-12-14AD74328ND
2012-12-14AD74328ND
2013-04-09AD77009ND
2013-04-09AD77010ND
2013-04-09AD77011ND
2013-04-09AD77008ND
2013-04-09AD77008ND
2013-04-09AD77011ND
2013-04-09AD77009ND
2013-04-09AD77010ND
2014-02-17AD89236ND
2014-02-17AD89236ND
2014-02-17AD89231ND
2014-02-17AD89231ND
2014-07-15AD93561ND
2014-07-15AD93556ND
2014-07-15AD93556ND
2014-07-15AD93561ND
2015-12-0335220686003ND
2015-12-03352206860040.0420 ppm
2015-12-03352206860050.0300 ppm
2015-12-0335220686002ND
2015-12-0335220686003ND
2015-12-03352206860040.0420 ppm
2015-12-03352206860050.0300 ppm
2015-12-0335220686002ND
2016-12-0635282272012ND
2016-12-0635282272013ND
2016-12-0635282272013ND
2016-12-0635282272012ND
2016-12-2035284709008ND
2016-12-2035284709009ND
2016-12-2035284709008ND
2016-12-2035284709009ND
2017-03-1435301204004ND
2017-03-1435301204003ND
2017-03-1435301204003ND
2017-03-1435301204004ND
2017-07-1035324127010ND
2017-07-1035324127010ND
2017-07-1035324127011ND
2017-07-1035324127011ND