Know Your Environment. Protect Your Health.

Chloroform

Aromas Water District

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.500 ppb21ND - 1.000 ppb
2020ND20ND
2021ND20ND
20220.500 ppb21ND - 1.000 ppb
2023ND20ND

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
2018-07-02CA3510004_DST_802-201807021215ND
2018-07-02CA3510004_DST_801-201807021131ND
2019-07-01CA3510004_DST_801-2019070111471.000 ppb
2019-07-01CA3510004_DST_802-201907011209ND
2020-07-06CA3510004_DST_802-202007061127ND
2020-07-06CA3510004_DST_801-202007061044ND
2021-07-12CA3510004_DST_801-202107121237ND
2021-07-12CA3510004_DST_802-202107121330ND
2022-07-11CA3510004_DST_801-2022071111001.000 ppb
2022-07-11CA3510004_DST_802-202207111141ND
2023-07-03CA3510004_DST_801-202307031232ND
2023-07-03CA3510004_DST_802-202307031145ND