Know Your Environment. Protect Your Health.

Chloroform

Comanche County Water Supply Corporation Sipe Springs

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

36

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201830.1 ppb85ND - 79.2 ppb
20194.39 ppb83ND - 14.6 ppb
20209.09 ppb86ND - 46.2 ppb
202195.4 ppb86ND - 342.0 ppb
202217.5 ppb882.20 ppb - 56.1 ppb
20232.70 ppb881.50 ppb - 3.70 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
2018-02-27AE1599275.2 ppb
2018-02-27AE1598979.2 ppb
2018-06-04AE2845362.9 ppb
2018-06-04AE2845121.6 ppb
2018-09-13AE399811.70 ppb
2018-09-13AE39982ND
2018-11-07AE45563ND
2018-11-07AE45564ND
2019-02-19AE54825ND
2019-02-19AE54827ND
2019-06-04AE69040ND
2019-06-04AE690438.40 ppb
2019-08-07AE7739712.1 ppb
2019-08-07AE7739514.6 ppb
2019-11-06AE88626ND
2019-11-06AE88631ND
2020-02-13AE983533.70 ppb
2020-02-13AE983547.30 ppb
2020-04-21AF07359ND
2020-04-21AF07361ND
2020-07-15AF193754.70 ppb
2020-07-15AF193774.90 ppb
2020-11-10AF3384446.2 ppb
2020-11-10AF338475.90 ppb
2021-03-04AF453279.10 ppb
2021-03-04AF453289.30 ppb
2021-04-13AF49927ND
2021-04-13AF49938ND
2021-07-07AF60915272.0 ppb
2021-07-07AF60916342.0 ppb
2021-11-02AF7538065.5 ppb
2021-11-02AF7538464.9 ppb
2022-03-21AF8975319.6 ppb
2022-03-21AF8975512.1 ppb
2022-05-19AF9772031.8 ppb
2022-05-19AF9772356.1 ppb
2022-07-07AG036628.30 ppb
2022-07-07AG036687.10 ppb
2022-11-30AG201962.20 ppb
2022-11-30AG201982.70 ppb
2023-01-24AG259922.40 ppb
2023-01-24AG259951.50 ppb
2023-05-11AG401702.60 ppb
2023-05-11AG401711.80 ppb
2023-09-06AG550433.50 ppb
2023-09-06AG550453.40 ppb
2023-12-28AG673532.70 ppb
2023-12-28AG673543.70 ppb