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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Sierra Madre 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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND50ND
2015N/A00N/A
2016N/A00N/A
2017ND50ND

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
2014-05-129588-003-1030ND
2014-05-129588-004-1045ND
2014-05-129588-005-1105ND
2014-05-129588-006-1055ND
2014-05-129588-007-1125ND
2017-05-039588-003-1030ND
2017-05-039588-004-1045ND
2017-05-039588-005-0930ND
2017-05-039588-006-0940ND
2017-05-039588-007-1010ND