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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

York Water Company

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-02-201406575ND
2014-05-131417072ND
2014-08-191432334ND
2014-11-111444244ND
2015-02-1712497631ND
2015-05-1212863954ND
2015-08-1213246468ND
2015-11-1013615650ND
2016-02-2213967712ND
2016-05-1114384053ND
2016-08-1714884629ND
2016-11-1615347976ND
2017-02-1515773771ND
2017-05-1616234646ND
2017-08-1016705762ND
2017-11-1417142795ND
2018-02-142295547003ND
2018-05-092314208003ND
2018-08-092331795004ND
2018-11-143000425003ND
2019-02-203017336003ND
2019-05-083032293003ND
2019-08-133051259003ND
2019-11-133069543003ND