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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

City of Nampa

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.

 

15

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
2013ND20ND
2014N/A00N/A
2015N/A00N/A
2016ND10ND
20170.00167 ppm122ND - 0.01000 ppm

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
2013-12-05I1351273ND
2013-12-12I1352282ND
2016-11-17I1652991ND
2017-10-18I17487730.01000 ppm
2017-10-18I1748774ND
2017-10-18I17487730.01000 ppm
2017-10-18I1748766ND
2017-10-18I1748763ND
2017-10-18I1748750ND
2017-10-18I1748754ND
2017-10-18I1748748ND
2017-10-18I1748749ND
2017-10-18I1748756ND
2017-10-18I1748770ND
2017-10-27I1750485ND