Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrite

City of Duncanville

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
20130.0167 ppm32ND - 0.0315 ppm
2014ND30ND
20150.0322 ppm330.0190 ppm - 0.0520 ppm
2016N/A00N/A
2017N/A00N/A

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
2012-02-211202590001ND
2012-02-211202590002ND
2012-02-211202590003ND
2014-10-27Q1453998001ND
2014-10-27Q1453998002ND
2014-10-27Q1453998003ND
2015-06-16Q15222120010.0190 ppm
2015-06-16Q15222120020.0255 ppm
2015-06-16Q15222120030.0520 ppm