Know Your Environment. Protect Your Health.

Vinyl chloride

Mountain Springs Water Supply Corporation

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND50ND
2021ND40ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-03-13Q1810191003ND
2018-03-13Q1810191005ND
2018-03-13Q1810191001ND
2018-06-28Q1826059002ND
2019-01-28Q1904051006ND
2019-01-28Q1904051008ND
2019-01-28Q1904051010ND
2019-01-28Q1904051012ND
2020-05-13Q2019339010ND
2020-09-29Q2038336001ND
2020-11-05Q2043235022ND
2020-11-05Q2043235008ND
2020-11-05Q2043235004ND
2021-11-16Q2132004001ND
2021-11-16Q2132004003ND
2021-11-16Q2132004005ND
2021-11-16Q2132004007ND
2022-10-18Q2231735009ND
2022-10-18Q2231735011ND
2022-10-18Q2231735013ND
2022-10-18Q2231735015ND
2023-11-30Q2351033007ND
2023-11-30Q2351033009ND
2023-11-30Q2351033011ND
2023-12-13Q2353413003ND