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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Dover Air Force Base

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.

MORE ABOUT THIS CONTAMINANT

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND150ND
2016ND50ND
2017ND50ND
2018ND130ND
2019ND130ND

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
2014-07-07S575368ND
2014-10-08S573378ND
2014-11-05S589465ND
2014-12-03S589556ND
2014-12-31S447362ND
2015-01-06S589668ND
2015-01-21S588733ND
2015-02-02S603195ND
2015-03-03S603364ND
2015-04-06S616765ND
2015-05-01S617002ND
2015-06-02S639957ND
2015-07-09S640359ND
2015-08-05S640454ND
2015-08-26S640538ND
2015-09-21S640620ND
2015-10-01S640050ND
2015-11-02S629147ND
2015-12-01S643149ND
2015-12-08S654791ND
2016-01-05S624999ND
2016-02-02S640665ND
2016-02-29S659170ND
2016-03-01S659174ND
2016-08-16S671721ND
2017-07-18S737359ND
2017-07-18S730791ND
2017-11-02S757416ND
2017-11-13S757493ND
2017-12-06S757505ND
2018-01-16S757708ND
2018-01-17S769445ND
2018-02-06S757768ND
2018-03-08S757788ND
2018-04-03S759331ND
2018-05-15S759350ND
2018-06-25S757795ND
2018-07-05S759484ND
2018-08-02S694295ND
2018-09-17S759569ND
2018-10-08S759588ND
2018-11-06S759641ND
2018-12-04S811834ND
2019-01-02S759673ND
2019-02-19S759629ND
2019-03-07S824253ND
2019-04-03S759686ND
2019-05-02S759698ND
2019-06-06S759284ND
2019-06-18S848051ND
2019-07-30S757554ND
2019-08-08S759734ND
2019-09-09S759706ND
2019-10-03S759711ND
2019-11-05S895867ND
2019-12-02S919986ND