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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Troy

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0325 ppm43ND - 0.1000 ppm
20130.01000 ppm43ND - 0.0200 ppm
20140.0180 ppm43ND - 0.0240 ppm
20150.0238 ppm43ND - 0.0620 ppm
20160.0248 ppm54ND - 0.0470 ppm
20170.0265 ppm65ND - 0.0510 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
2012-01-09AB640370.01000 ppm
2012-01-09AB64038ND
2012-01-09AB640390.1000 ppm
2012-01-09AB640360.0200 ppm
2013-01-09AB89392ND
2013-01-09AB893930.01000 ppm
2013-01-09AB893940.0200 ppm
2013-01-09AB893950.01000 ppm
2014-01-24AC171300.0240 ppm
2014-01-24AC171310.0240 ppm
2014-01-24AC17132ND
2014-01-24AC171330.0240 ppm
2015-01-15AC40931ND
2015-09-02AC579070.0130 ppm
2015-09-02AC579080.0200 ppm
2015-10-14AC622200.0620 ppm
2016-01-22AC65465ND
2016-08-17AC821210.0150 ppm
2016-08-17AC821200.0200 ppm
2016-08-17AC821190.0420 ppm
2016-08-17AC821180.0470 ppm
2017-01-27AC895610.0510 ppm
2017-08-10AD039660.0450 ppm
2017-08-25AD037510.01000 ppm
2017-08-25AD03752ND
2017-08-25AD037500.0110 ppm
2017-08-25AD037530.0420 ppm