Know Your Environment. Protect Your Health.

Chloroform

City of Aubrey

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND60ND
2020ND70ND
2021ND60ND
2022ND60ND
2023ND90ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-15Q1810837004ND
2018-03-15Q1810837006ND
2018-03-15Q1810837008ND
2018-03-15Q1810837002ND
2018-07-10Q1827457001ND
2018-07-10Q1827457002ND
2019-05-15Q1926233015ND
2019-05-15Q1926233014ND
2019-05-15Q1926233007ND
2019-05-15Q1926233005ND
2019-05-15Q1926233003ND
2019-05-15Q1926233001ND
2020-03-26Q2012850003ND
2020-05-18Q2019651001ND
2020-05-18Q2019651003ND
2020-05-18Q2019651004ND
2020-10-05Q2038828008ND
2020-10-05Q2038828010ND
2020-10-05Q2038828012ND
2021-07-01Q2117370012ND
2021-07-01Q2117370021ND
2021-07-01Q2117370018ND
2021-07-01Q2117370014ND
2021-07-01Q2117370011ND
2021-07-01Q2117370016ND
2022-08-24Q2225200001ND
2022-08-24Q2225200002ND
2022-10-13Q2231065002ND
2022-10-13Q2231065004ND
2022-10-13Q2231065006ND
2022-10-13Q2231065008ND
2023-04-11Q2313300012ND
2023-09-26Q2341271006ND
2023-09-26Q2341271008ND
2023-09-26Q2341271010ND
2023-09-26Q2341271012ND
2023-09-26Q2341271034ND
2023-09-26Q2341271035ND
2023-09-26Q2341271037ND
2023-11-14Q2348752005ND