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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Martin County Utilities

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
20120.0220 ppm220.0220 ppm
20130.0220 ppm220.0220 ppm
20140.0550 ppm41ND - 0.220 ppm
2015ND20ND
2016ND20ND
2017ND40ND

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 Result
2012-02-020.0220 ppm
2012-02-020.0220 ppm
2013-02-020.0220 ppm
2013-02-020.0220 ppm
2014-03-12ND
2014-03-12ND
2014-07-010.220 ppm
2014-07-01ND
2015-08-06ND
2015-08-06ND
2016-01-12ND
2016-01-12ND
2017-04-11ND
2017-04-11ND
2017-06-22ND
2017-06-22ND