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EWG's Tap Water Database — 2019 UPDATE

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Vinyl chloride

Newhall CWD-Newhall

Vinyl chloride is a known human carcinogen used for production of polyvinyl chloride (PVC) plastics. Discharges from plastics manufacturing can contaminate drinking water with vinyl chloride. Read More.

Exposure to vinyl chloride increases the risk of cancer and can damage the liver and nervous system. The California public health goal of 0.05 parts per billion, set to protect against cancer, is 40 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 2 parts per billion.

Plastic pipes made of polyvinyl chloride (PVC) and chlorinated PVC (CPVC) are widely used for drinking water distribution lines and internal plumbing, raising concern about vinyl chloride contamination of drinking water. A study published in 2011 by Ryan Walter of Cornell University School of Civil and Environmental Engineering suggested that small amounts of vinyl chloride can leach from PVC pipes. Vinyl chloride can also form in the pipes as a result of water disinfection with chlorine.

In an assessment completed in 2000, California Office of Environmental Health Hazard Assessment stated that drinking water is not a significant source of exposure to vinyl chloride for the general population.

Click here to read more about carcinogenic VOCs.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND80ND
2014ND70ND
2015ND80ND
2016ND80ND
2017ND90ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.05 ppb

The EWG Health Guideline of 0.05 ppb for vinyl chloride was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for vinyl chloride, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to vinyl chloride exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-099590-006-1037ND
2012-02-099590-007-1017ND
2012-04-129590-007-1150ND
2012-04-129590-006-0830ND
2012-07-129590-006-1012ND
2012-07-129590-007-0950ND
2012-10-119590-006-1100ND
2012-10-119590-007-1109ND
2013-01-109590-007-0940ND
2013-01-109590-006-0925ND
2013-04-119590-007-0901ND
2013-04-119590-006-0841ND
2013-07-119590-007-0925ND
2013-07-119590-006-0912ND
2013-10-109590-007-1205ND
2013-10-109590-006-1140ND
2014-01-169590-007-1105ND
2014-04-109590-007-0936ND
2014-05-299590-006-0955ND
2014-07-179590-007-0850ND
2014-07-179590-006-0825ND
2014-10-139590-007-1037ND
2014-10-139590-006-1005ND
2015-01-159590-007-0925ND
2015-01-159590-006-1023ND
2015-04-239590-006-1100ND
2015-04-239590-007-1118ND
2015-07-169590-006-0910ND
2015-07-169590-007-0925ND
2015-10-159590-006-0920ND
2015-10-159590-007-0930ND
2016-01-079590-006-0855ND
2016-01-079590-007-0930ND
2016-04-149590-007-1055ND
2016-04-149590-006-1115ND
2016-07-219590-007-0815ND
2016-07-219590-006-0858ND
2016-10-069590-007-1115ND
2016-10-069590-006-1045ND
2017-01-129590-006-0855ND
2017-02-239590-007-1155ND
2017-04-139590-007-0911ND
2017-04-139590-007-0900ND
2017-04-139590-006-0940ND
2017-04-139590-006-0930ND
2017-07-139590-006-0840ND
2017-07-139590-007-1000ND
2017-10-199590-007-0945ND