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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Brookfield Water Utility

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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0919 ppm175ND - 0.860 ppm
2015N/A00N/A
2016N/A00N/A
20170.0984 ppm174ND - 0.840 ppm
2018N/A00N/A
2019ND10ND

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
2014-06-17797348ND
2014-06-17797350ND
2014-06-177973390.490 ppm
2014-06-177973400.0880 ppm
2014-06-177973470.0630 ppm
2014-06-177973430.0620 ppm
2014-06-17797342ND
2014-06-17797346ND
2014-06-17797341ND
2014-06-17797338ND
2014-06-17797349ND
2014-06-17797336ND
2014-06-17797344ND
2014-06-17797337ND
2014-06-17797351ND
2014-06-17797345ND
2014-07-308068760.860 ppm
2017-03-22979236ND
2017-03-22979241ND
2017-03-22979235ND
2017-03-22979239ND
2017-03-229792340.0530 ppm
2017-03-229792250.140 ppm
2017-03-229792260.640 ppm
2017-03-229792270.840 ppm
2017-03-22979238ND
2017-03-22979228ND
2017-03-22979232ND
2017-03-22979240ND
2017-03-22979237ND
2017-03-22979231ND
2017-03-22979230ND
2017-03-22979233ND
2017-03-22979229ND
2019-10-101154413ND