Know Your Environment. Protect Your Health.

Tetrachloroethylene (perchloroethylene)

High-tor Properties

Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries. Read More.

The EPA considers tetrachloroethylene a likely human carcinogen. It has been linked with increased incidence of lung, breast and colon cancers. Tetrachloroethylene also damages the liver, kidneys and central nervous system. The California public health goal of 0.06 parts per billion, set to protect against cancer, is 80 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion.

Click here to read more about carcinogenic VOCs.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND50ND
2021ND30ND
2022ND60ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for tetrachloroethylene 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): 5 ppb

The legal limit for tetrachloroethylene, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to tetrachloroethylene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-06-26DW-91135ND
2018-06-26DW-91131ND
2018-06-26DW-91133ND
2019-10-299101372ND
2019-10-299101372-02ND
2019-10-299101372-03ND
2020-05-060050163-03ND
2020-05-060050164-02VND
2020-05-060050164-01VND
2020-09-140090571-01VOCND
2020-11-100110439-02VND
2021-11-151110754-04ND
2021-11-151110754-03ND
2021-11-151110754-02ND
2022-01-24EHS2200009066-01ND
2022-01-24EHS2200004720-SR-2ND
2022-01-24EHS2200004719-01VOCND
2022-01-24EHS2200004720-01VOCND
2022-01-24EHS2200004717-01VOCND
2022-02-17EHS2200009066-SR-1ND
2023-09-2723I1769-01ND
2023-10-2723J1871-01ND