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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Cedar Rapids Water Department

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20130.0200 ppm42ND - 0.0400 ppm
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2012-05-091902640ND
2012-05-091902641ND
2012-10-311943782ND
2012-10-311943784ND
2013-09-102005703ND
2013-09-102005705ND
2013-12-3120243610.0400 ppm
2013-12-3120243620.0400 ppm
2014-10-082085412ND
2014-10-082085409ND
2015-10-06OE302401ND
2015-10-06OE302405ND
2016-10-17OE441633ND
2016-10-17OE441634ND
2017-11-20OE592397ND
2017-11-20OE592396ND