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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

City of Baltimore

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
20140.00333 ppm62ND - 0.01000 ppm
2015ND30ND
2016ND30ND
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
2012-02-07120207_01_TREATEND
2012-05-08120508_02_T11ND
2012-05-22120522_02_T41ND
2013-01-23130123_01_COB012ND
2013-05-29130529_02_CB0529ND
2013-05-29130529_02_COB052ND
2014-01-06BC01062014ND
2014-01-07140107_01_COB010ND
2014-04-08MONTEBELLO_PLANTND
2014-04-08140408_02_C04081ND
2014-04-24MONTEBELLO_PLANT0.01000 ppm
2014-04-24140424_01_COB0420.01000 ppm
2015-01-05TREATED_GRAB_TND
2015-04-02MONTEBELLO_PLANTND
2015-04-02MONTEBELLO_PLANTND
2016-01-05TP01_160105_01ND
2016-05-01TP02_160501_02ND
2016-05-01TP02_160501_01ND
2017-05-05TP02_170505_01ND
2017-05-07TP01_170507_01ND