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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Tipton

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.

 

17

Samples

1

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.168 ppm32ND - 0.272 ppm
2015ND30ND
20165.81 ppm222.08 ppm - 9.53 ppm
20170.0867 ppm31ND - 0.260 ppm
20180.367 ppm330.337 ppm - 0.383 ppm
20195.86 ppm330.258 ppm - 16.8 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
2014-02-2412804420.232 ppm
2014-05-1913028630.272 ppm
2014-11-171350964ND
2015-02-091371568ND
2015-07-131410100ND
2015-11-021440865ND
2016-03-1414744332.08 ppm
2016-11-071100898019.53 ppm
2017-03-06112237201ND
2017-05-01114432701ND
2017-08-151185877010.260 ppm
2018-06-0418063280.383 ppm
2018-07-0218072840.337 ppm
2018-10-0118101160.382 ppm
2019-04-01190430716.8 ppm
2019-07-1819076880.258 ppm
2019-10-0719102740.520 ppm