Know Your Environment. Protect Your Health.

Chloroform

Pittsboro, Town of

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.83 ppb83ND - 6.00 ppb
20190.300 ppb41ND - 1.20 ppb
20203.28 ppb87ND - 8.90 ppb
20211.60 ppb85ND - 4.40 ppb
20220.563 ppb83ND - 1.60 ppb
20231.34 ppb85ND - 3.90 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
2018-01-248133-012418-B02MND
2018-01-248133-012418-B01MND
2018-04-118133-041118-B02M3.10 ppb
2018-04-118133-041118-B01MND
2018-07-188133-071818-B01MND
2018-07-188133-071818-B02MND
2018-10-178133-101718-B01M5.50 ppb
2018-10-178133-101718-B02M6.00 ppb
2019-07-178133-071719-B01MND
2019-07-178133-071719-B02MND
2019-10-238133-102319-B01M1.20 ppb
2019-10-238133-102319-B02MND
2020-01-158133-011520-B01M2.10 ppb
2020-01-158133-011520-B02M5.30 ppb
2020-04-158133-041520-B01M1.20 ppb
2020-04-158133-041520-B02M2.00 ppb
2020-07-078133-070720-B01M5.60 ppb
2020-07-078133-070720-B02M8.90 ppb
2020-10-138133-101320-B01MND
2020-10-138133-101320-B02M1.10 ppb
2021-01-128133-011221-B01M1.90 ppb
2021-01-128133-011221-B02MND
2021-04-138133-041321-B01M4.40 ppb
2021-04-138133-041321-B02M3.00 ppb
2021-07-138133-071321-B01M2.20 ppb
2021-07-138133-071321-B02M1.30 ppb
2021-10-128133-101221-B01MND
2021-10-128133-101221-B02MND
2022-01-118133-011122-B01M1.60 ppb
2022-01-118133-011122-B02M1.50 ppb
2022-04-128133-041222-B01M1.40 ppb
2022-04-128133-041222-B02MND
2022-07-128133-071222-B02MND
2022-07-128133-071222-B01MND
2022-10-188133-101822-B02MND
2022-10-318133-103122-B01MND
2023-01-108133-011023-B01MND
2023-01-108133-011023-B02MND
2023-04-118133-041123-B01M1.40 ppb
2023-04-118133-041123-B02MND
2023-07-188133-071823-B01M3.90 ppb
2023-07-188133-071823-B02M3.20 ppb
2023-10-248133-102423-B01M1.20 ppb
2023-10-248133-102423-B02M1.000 ppb