Know Your Environment. Protect Your Health.

Chloroform

Woden 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.

 

45

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.56 ppb73ND - 7.67 ppb
20190.314 ppb72ND - 1.12 ppb
20201.38 ppb73ND - 6.03 ppb
20210.285 ppb81ND - 2.28 ppb
20220.553 ppb72ND - 2.84 ppb
20230.794 ppb93ND - 3.93 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
2018-03-20Q1811091009ND
2018-03-20Q18110910127.67 ppb
2018-03-20Q18110910141.54 ppb
2018-03-20Q1811091015ND
2018-03-20Q18110910181.71 ppb
2018-03-20Q1811091002ND
2018-08-30Q1834993001ND
2019-01-16Q1902343004ND
2019-01-16Q19023430071.12 ppb
2019-01-16Q1902343009ND
2019-01-16Q19023430101.08 ppb
2019-01-16Q1902343013ND
2019-09-16Q1965918001ND
2019-10-08Q1972051001ND
2020-04-07Q2014004007ND
2020-04-07Q2014004009ND
2020-04-07Q2014004011ND
2020-09-14Q20363320016.03 ppb
2020-11-04Q20428760011.92 ppb
2020-11-04Q2042876006ND
2020-11-04Q20428760101.71 ppb
2021-03-16Q2106923002ND
2021-05-18Q2112986002ND
2021-05-18Q2112986006ND
2021-05-18Q2112986004ND
2021-10-11Q2128064005ND
2021-10-11Q2128064007ND
2021-10-11Q21280640092.28 ppb
2021-10-11Q2128064011ND
2022-03-03Q2207392002ND
2022-06-15Q2216701009ND
2022-06-15Q22167010132.84 ppb
2022-06-15Q2216701007ND
2022-06-15Q2216701005ND
2022-06-15Q22167010031.03 ppb
2022-06-15Q2216701002ND
2023-03-01Q2308261006ND
2023-06-27Q23246010091.71 ppb
2023-06-27Q23246010113.93 ppb
2023-06-27Q2324601013ND
2023-06-27Q2324601015ND
2023-06-27Q23246010171.51 ppb
2023-06-27Q2324601047ND
2023-09-11Q2338754001ND
2023-11-17Q2349764001ND