Know Your Environment. Protect Your Health.

Chloroform

Sunbelt Fresh Water Supply District Oakwilde Subdivision

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.13 ppb96ND - 7.00 ppb
20191.43 ppb94ND - 4.20 ppb
20201.50 ppb94ND - 4.10 ppb
20211.20 ppb94ND - 3.70 ppb
20223.60 ppb94ND - 11.6 ppb
20233.71 ppb94ND - 10.4 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
2018-01-29AE11219ND
2018-01-29AE112141.70 ppb
2018-01-29AE11297ND
2018-04-10AE218515.00 ppb
2018-04-10AE218534.70 ppb
2018-08-28AE386467.00 ppb
2018-08-28AE386503.00 ppb
2018-10-12AE43396ND
2018-10-12AE433976.80 ppb
2019-01-30AE521592.30 ppb
2019-01-30AE521773.00 ppb
2019-01-30AE52234ND
2019-04-15AE622654.20 ppb
2019-04-15AE62266ND
2019-08-05AE77012ND
2019-08-05AE77008ND
2019-12-06AE91631ND
2019-12-18AE926943.40 ppb
2020-02-19AE989581.90 ppb
2020-02-19AE98959ND
2020-02-19AE99012ND
2020-05-20AF12083ND
2020-05-20AF121123.80 ppb
2020-08-18AF24029ND
2020-08-18AF240304.10 ppb
2020-10-14AF305613.70 ppb
2020-10-14AF30562ND
2021-02-03AF424223.70 ppb
2021-02-03AF42442ND
2021-04-29AF51874ND
2021-04-29AF518761.80 ppb
2021-04-29AF51968ND
2021-08-18AF668393.50 ppb
2021-08-18AF66843ND
2021-10-14AF73535ND
2021-10-14AF735401.80 ppb
2022-01-26AF81863ND
2022-01-26AF81895ND
2022-05-26AF98649ND
2022-05-26AF9865611.6 ppb
2022-05-26AF98679ND
2022-08-22AG102037.10 ppb
2022-08-22AG102057.40 ppb
2022-12-15AG21928ND
2022-12-15AG219326.30 ppb
2023-03-07AG318497.90 ppb
2023-03-07AG31850ND
2023-05-03AG39101ND
2023-05-03AG391076.10 ppb
2023-05-03AG39171ND
2023-07-19AG49295ND
2023-07-19AG4933210.4 ppb
2023-11-27Q23507800018.98 ppb
2023-11-27Q2350780002ND