Know Your Environment. Protect Your Health.

Chloroform

Crestwood Water Company

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

51

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201816.9 ppb109ND - 34.9 ppb
201915.7 ppb107ND - 45.6 ppb
20204.32 ppb10101.000 ppb - 8.17 ppb
20214.22 ppb109ND - 9.03 ppb
20225.96 ppb108ND - 9.30 ppb
20235.29 ppb108ND - 17.0 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
2018-02-27Q180838400223.6 ppb
2018-02-27Q180838400123.5 ppb
2018-06-20Q182459900834.9 ppb
2018-06-20Q182459900930.8 ppb
2018-06-20Q182459901629.2 ppb
2018-06-20Q1824599002ND
2018-09-25Q18381990017.64 ppb
2018-09-25Q18381990028.89 ppb
2018-12-06Q18499490015.53 ppb
2018-12-06Q18499490025.17 ppb
2019-02-26Q1908261005ND
2019-02-26Q1908261006ND
2019-02-26Q19082610073.05 ppb
2019-02-26Q1908261010ND
2019-05-28Q192880100145.6 ppb
2019-05-28Q192880100241.5 ppb
2019-09-25Q196925900124.7 ppb
2019-09-25Q196925900224.9 ppb
2019-11-19Q19773220018.90 ppb
2019-11-19Q19773220028.54 ppb
2020-02-26Q20073880017.75 ppb
2020-02-26Q20073880028.17 ppb
2020-05-12Q20183850012.95 ppb
2020-05-12Q20183850031.000 ppb
2020-05-12Q20183850083.72 ppb
2020-05-12Q20183850093.73 ppb
2020-08-18Q20328810011.62 ppb
2020-08-18Q20328810022.78 ppb
2020-11-18Q20461880015.69 ppb
2020-11-18Q20461880025.74 ppb
2021-03-23Q21073810011.04 ppb
2021-03-23Q21073810021.000 ppb
2021-05-17Q21126170014.06 ppb
2021-05-17Q21126170023.50 ppb
2021-09-21Q21258400014.59 ppb
2021-09-21Q21258400024.71 ppb
2021-12-16Q21357120055.77 ppb
2021-12-16Q2135712007ND
2021-12-16Q21357120149.03 ppb
2021-12-16Q21357120158.46 ppb
2022-03-16Q22088810033.70 ppb
2022-03-16Q22088810067.43 ppb
2022-03-16Q22088810077.38 ppb
2022-05-17Q22145220016.72 ppb
2022-05-17Q22145220027.10 ppb
2022-08-24Q2225216001ND
2022-08-24Q2225216002ND
2022-11-22Q22351290019.30 ppb
2022-11-22Q22351290068.82 ppb
2022-11-22Q22351290079.17 ppb
2023-02-02Q23041560013.85 ppb
2023-02-02Q23041560024.15 ppb
2023-02-02Q23041560036.64 ppb
2023-02-02Q23041560053.67 ppb
2023-06-13Q232243700117.0 ppb
2023-06-13Q232243700214.0 ppb
2023-08-28Q2336731001ND
2023-08-28Q2336731002ND
2023-11-10Q23484310011.93 ppb
2023-11-10Q23484310021.64 ppb