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EWG's Tap Water Database — 2019 UPDATE

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N-Nitrosopiperidine

Monterey Park Water Department

N-Nitrosopiperidine 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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND80ND
2014ND120ND
2015ND120ND
2016ND40ND
2017ND40ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-119588-013-0835ND
2012-01-119588-081-0800ND
2012-01-119588-010-0905ND
2012-01-119588-038-0855ND
2013-01-089588-013-1015ND
2013-01-089588-081-0900ND
2013-01-089588-010-1015ND
2013-01-089588-038-1030ND
2013-07-089588-038-0740ND
2013-07-089588-013-0710ND
2013-07-089588-010-0705ND
2013-07-089588-081-0825ND
2014-01-159588-038-0725ND
2014-01-159588-013-0820ND
2014-01-159588-081-0915ND
2014-01-159588-010-0810ND
2014-04-089588-081-0910ND
2014-04-089588-010-0945ND
2014-04-089588-013-0820ND
2014-04-089588-038-0840ND
2014-10-089588-010-1000ND
2014-10-089588-013-1025ND
2014-10-089588-038-1010ND
2014-10-089588-081-1135ND
2015-01-139588-010-1145ND
2015-01-139588-081-1205ND
2015-01-139588-038-1155ND
2015-01-139588-013-1205ND
2015-04-069588-081-0805ND
2015-04-069588-010-1030ND
2015-04-069588-038-0920ND
2015-04-069588-013-0900ND
2015-07-079588-081-0945ND
2015-07-079588-010-0912ND
2015-07-079588-013-0840ND
2015-08-079588-038-0750ND
2016-01-049588-081-1130ND
2016-01-049588-010-0416ND
2016-01-049588-013-1020ND
2016-01-049588-038-1010ND
2017-01-109590-010-1035ND
2017-01-109590-013-0950ND
2017-01-109590-038-0930ND
2017-01-109590-081-0835ND