Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrite

Collegeville Trappe Joint Public Works 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

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND120ND
2016ND80ND
2017ND90ND
2018ND120ND
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
2014-03-1720140954ND
2014-03-1920141002ND
2014-04-2120141340ND
2014-04-2120141341ND
2014-04-2120141342ND
2014-04-2120141343ND
2014-04-2120141344ND
2014-04-2120141345ND
2014-04-2120141339ND
2014-07-0720142240ND
2014-07-0720142241ND
2014-10-2020143554ND
2014-10-2020143555ND
2015-01-1912285443ND
2015-01-1912285446ND
2015-04-0612631574ND
2015-04-0612631571ND
2015-04-0612631577ND
2015-04-0612631580ND
2015-04-0612631568ND
2015-04-0612631583ND
2015-04-0612631565ND
2015-07-0613011196ND
2015-07-0613011198ND
2015-10-0513387768ND
2016-01-1813751210ND
2016-04-1814101331ND
2016-04-1814101329ND
2016-04-1814101333ND
2016-04-1814101327ND
2016-04-1814101325ND
2016-04-1814101323ND
2016-04-1814101335ND
2017-04-1715935320ND
2017-04-1715935318ND
2017-04-1715935314ND
2017-04-1715935312ND
2017-04-1715935310ND
2017-04-1715935308ND
2017-04-1715935316ND
2017-08-0116411660ND
2017-10-1616878511ND
2018-02-0520180478ND
2018-04-1820181574ND
2018-04-1820181573ND
2018-04-1820181572ND
2018-04-1820181571ND
2018-04-1820181568ND
2018-04-1820181569ND
2018-04-1820181570ND
2018-08-1320183124ND
2018-08-1320183123ND
2018-10-1520183944ND
2018-10-1520183945ND
2019-02-0420190429ND
2019-02-0420190430ND
2019-04-1520191433ND
2019-04-1520191432ND
2019-04-1520191437ND
2019-04-1520191436ND
2019-04-1520191434ND
2019-04-1520191435ND
2019-05-149053535-01ND
2019-08-1920193301ND
2019-08-1920193300ND
2019-11-0420194272ND
2019-11-0420194271ND