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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Randolph 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND40ND
2014ND20ND
20150.0460 ppm220.0460 ppm
2016ND40ND
2017ND20ND

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
2012-10-10AD72005ND
2012-10-10AD72005ND
2013-03-18AD76098ND
2013-03-18AD76098ND
2013-10-14AD85940ND
2013-10-14AD85940ND
2014-12-05AE00453ND
2014-12-05AE00453ND
2015-08-24352044200010.0460 ppm
2015-08-24352044200010.0460 ppm
2016-03-2835236638001ND
2016-03-2835236638001ND
2016-03-2935236638005ND
2016-03-2935236638005ND
2017-07-1035324127009ND
2017-07-1035324127009ND