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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Laurel 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.

MORE ABOUT THIS CONTAMINANT

 

103

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND130ND
2016ND130ND
2017ND140ND
2018ND220ND
2019ND280ND

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
2014-01-23S237957ND
2014-02-19S107839ND
2014-03-18S107824ND
2014-03-20S107835ND
2014-04-07S107846ND
2014-05-06S107836ND
2014-06-04S237967ND
2014-07-08S111083ND
2014-08-13S111084ND
2014-09-16S238015ND
2014-10-15S237927ND
2014-11-12S237932ND
2014-12-09S237937ND
2015-01-08S107884ND
2015-02-09S107889ND
2015-03-18S107905ND
2015-04-07S107897ND
2015-05-05S107918ND
2015-06-09S107919ND
2015-07-08S107924ND
2015-08-11S237942ND
2015-09-09S237951ND
2015-10-14S237956ND
2015-11-09S55091ND
2015-12-09S632505ND
2015-12-18S654864ND
2016-01-07S632510ND
2016-02-10S632515ND
2016-03-09S632520ND
2016-04-13S632526ND
2016-05-10S632532ND
2016-06-09S632537ND
2016-06-22S676750ND
2016-07-13S632542ND
2016-08-10S632547ND
2016-09-13S632553ND
2016-10-13S632562ND
2016-11-15S632595ND
2016-12-13S632563ND
2017-01-17S632609ND
2017-02-08S632460ND
2017-02-16S693786ND
2017-03-15S632469ND
2017-04-17S656151ND
2017-05-10S656152ND
2017-06-13S656157ND
2017-07-11S642932ND
2017-08-15S642937ND
2017-09-12S656162ND
2017-10-17S653538ND
2017-11-16S653543ND
2017-12-27S642923ND
2017-12-27S642924ND
2018-01-18S642925ND
2018-01-18S642926ND
2018-02-14S653548ND
2018-02-14S653550ND
2018-03-19S792210ND
2018-03-26S653559ND
2018-03-26S653560ND
2018-04-17M775708ND
2018-04-17S653561ND
2018-05-09S653568ND
2018-05-09S653569ND
2018-06-13S653574ND
2018-07-11S656076ND
2018-08-16S656082ND
2018-09-18S656087ND
2018-10-17S632565ND
2018-10-17S632566ND
2018-11-15S632575ND
2018-11-28S783894ND
2018-12-05S656089ND
2018-12-19S653583ND
2018-12-19S653588ND
2019-01-23S653589ND
2019-01-23S653594ND
2019-02-20S656061ND
2019-02-20S656062ND
2019-03-21S656067ND
2019-03-21S656072ND
2019-04-23S653595ND
2019-04-23S653596ND
2019-05-21S857010ND
2019-05-21S857011ND
2019-06-18S857016ND
2019-06-18S857021ND
2019-07-17S857025ND
2019-07-17S857030ND
2019-08-15S857031ND
2019-08-15S857036ND
2019-09-18S857040ND
2019-09-18S857041ND
2019-10-23S857051ND
2019-10-24S857046ND
2019-11-04S893203ND
2019-11-04S925131ND
2019-11-20S857059ND
2019-11-20S857060ND
2019-11-25S927551ND
2019-11-25S927552ND
2019-12-18S857061ND
2019-12-18S857062ND