Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrite

Valencia Heights 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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND10ND
2015ND10ND
2016N/A00N/A
2017ND40ND

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
2012-10-049588-012-0820ND
2013-07-099588-005-0745ND
2014-10-089588-010-0730ND
2015-10-169588-012-0800ND
2017-01-129588-005-0745ND
2017-08-163761-010-0700ND
2017-08-163761-012-0715ND
2017-10-119588-010-0805ND