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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Dover Air Force Base

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

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

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

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