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EWG's Tap Water Database — 2019 UPDATE

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N-Nitrosopiperidine

Glendale 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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND30ND
2015ND140ND
2016ND190ND
2017ND130ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-09-129590-070-0751ND
2012-09-129590-069-0742ND
2013-09-119590-070-0845ND
2013-09-119590-069-0835ND
2014-08-059590-069-0857ND
2014-09-109590-070-0857ND
2014-09-109590-069-0847ND
2015-05-139590-069-0837ND
2015-05-139590-070-0847ND
2015-06-109590-069-1041ND
2015-06-109590-070-1051ND
2015-07-159590-069-0957ND
2015-08-129590-069-0603ND
2015-08-129590-070-0613ND
2015-09-089590-069-1011ND
2015-09-089590-070-1027ND
2015-10-149590-069-0903ND
2015-11-109590-069-0715ND
2015-11-109590-070-0710ND
2015-12-099590-069-0901ND
2015-12-099590-070-0913ND
2016-01-139590-069-0931ND
2016-02-109590-070-0947ND
2016-02-109590-069-0937ND
2016-03-099590-069-0927ND
2016-03-099590-070-0937ND
2016-04-139590-069-1057ND
2016-05-119590-069-0901ND
2016-05-119590-070-0913ND
2016-07-139590-069-1017ND
2016-08-119590-069-0857ND
2016-08-119590-070-0907ND
2016-09-149590-069-1051ND
2016-09-149590-070-1103ND
2016-10-139590-069-1027ND
2016-11-109590-069-1057ND
2016-11-109590-070-1107ND
2016-12-159590-069-0913ND
2016-12-159590-070-0921ND
2016-12-289590-069-1107ND
2017-01-129588-069-1003ND
2017-02-219588-069-1027ND
2017-03-169588-069-1027ND
2017-04-139588-069-1017ND
2017-05-119588-069-0927ND
2017-06-129588-069-0847ND
2017-07-139588-069-0900ND
2017-08-109588-069-0921ND
2017-09-149588-070-0941ND
2017-09-149588-069-0931ND
2017-10-109588-069-1131ND
2017-11-169588-069-1113ND
2017-12-159588-069-0823ND