Know Your Environment. Protect Your Health.

Chloroform

Sky Lakes Water Supply Corporation

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201823.6 ppb53ND - 90.0 ppb
201924.7 ppb64ND - 64.0 ppb
20200.417 ppb62ND - 1.50 ppb
2021ND60ND
2022ND60ND
20230.167 ppb61ND - 1.000 ppb

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
2018-01-09AE08411ND
2018-01-09AE08351ND
2018-04-10AE218885.00 ppb
2018-07-31AE3510223.0 ppb
2018-10-23AE4431090.0 ppb
2019-02-27AE56273ND
2019-02-27AE5628164.0 ppb
2019-05-01AE64337ND
2019-05-01AE6437342.0 ppb
2019-07-23AE7557512.0 ppb
2019-10-31AE8816630.0 ppb
2020-03-05AF01447ND
2020-03-05AF014491.50 ppb
2020-06-16AF15518ND
2020-06-16AF155571.000 ppb
2020-07-29AF21397ND
2020-12-02AF36267ND
2021-03-10AF46288ND
2021-03-10AF46290ND
2021-06-16AF58362ND
2021-06-16AF58379ND
2021-08-19AF67194ND
2021-10-19AF73965ND
2022-02-08AF83727ND
2022-02-08AF83731ND
2022-05-11AF96525ND
2022-05-11AF96448ND
2022-09-13AG12684ND
2022-12-16AG22192ND
2023-01-25AG26252ND
2023-01-25AG26268ND
2023-05-10AG39993ND
2023-05-10AG40015ND
2023-08-25AG54325ND
2023-11-02AG621931.000 ppb