Know Your Environment. Protect Your Health.

Chloroform

Woodridge Village

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201859.0 ppb4431.0 ppb - 92.9 ppb
201930.5 ppb2230.3 ppb - 30.6 ppb
202033.4 ppb5522.5 ppb - 39.6 ppb
202167.2 ppb4431.0 ppb - 108.0 ppb
202238.1 ppb5519.4 ppb - 64.0 ppb
202352.9 ppb5520.3 ppb - 85.0 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
2018-03-01DBP J8C029141.2 ppb
2018-05-10DBP J8E0880-0192.9 ppb
2018-07-19DBP J8G1736-0170.8 ppb
2018-11-15DBP J8K0981-01,231.0 ppb
2019-02-28DBP J9B1399-0130.6 ppb
2019-07-25DBP J9G1503-0130.3 ppb
2020-02-05DBP S00002331936.2 ppb
2020-05-04TTHM S00002650122.5 ppb
2020-07-31DBP9 S00003228534.4 ppb
2020-08-03DBP9 S00003018734.4 ppb
2020-11-03DBP S030182,9539.6 ppb
2021-03-24DBP 369667-0131.0 ppb
2021-05-19DBP 37129957.0 ppb
2021-08-10DBP S062168,57417108.0 ppb
2021-11-03DBP S068292,372.8 ppb
2022-02-07POCS S06220921.3 ppb
2022-02-08DBP S07481419.4 ppb
2022-05-10DBP S074282,1364.0 ppb
2022-08-02DBP S000074783,91053.1 ppb
2022-11-09DBP S0103915,3132.6 ppb
2023-02-08DBP S0137412,0020.3 ppb
2023-05-02DBP SO137398, 41363.0 ppb
2023-08-10DBP S0137399,40785.0 ppb
2023-11-01POCS EHSS230006439751.0 ppb
2023-11-15DBP S00016618345.0 ppb