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EWG's Tap Water Database — 2019 UPDATE

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N-Nitrosodi-N-propylamine

Brigham City Water System

N-Nitrosodi-N-propylamine is one of the DNA-damaging, cancer-causing contaminants called N-nitrosamines that can form during water treatment with the use of certain disinfectants, such as chloramine. Read More.

Pollution of water sources with effluent from municipal wastewater treatment plants and runoff from animal feeding operations contributes to nitrosamine formation. Fifteen different nitrosamines are listed as carcinogens in the U.S. Department of Health and Human Services National Toxicology Program Report on Carcinogens. The federal government has not set a legal limit for nitrosamines in drinking water and water utilities typically do not test for these contaminants. California has set a public health goal for one of the most common nitrosamines, N-nitrosodimethylamine or NDMA, at 0.003 parts per billion in drinking water, a concentration that corresponds to an estimated one-in-one-million cancer risk.

 

23

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
2013ND60ND
2014ND10ND
2015N/A00N/A
2016ND150ND
2017ND10ND

ppb = parts per billion

All test results

Date Result
2013-05-29ND
2013-05-29ND
2013-05-29ND
2013-06-26ND
2013-07-17ND
2013-10-16ND
2014-07-10ND
2016-05-04ND
2016-05-04ND
2016-05-18ND
2016-05-18ND
2016-06-09ND
2016-06-09ND
2016-06-09ND
2016-07-20ND
2016-07-20ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-10-05ND
2017-02-23ND