Know Your Environment. Protect Your Health.

Chloroform

Hastings Homeowners Water System

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)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.07 ppb32ND - 2.10 ppb
20191.26 ppb54ND - 2.00 ppb
20201.60 ppb43ND - 2.30 ppb
20210.275 ppb41ND - 1.10 ppb
20220.280 ppb51ND - 1.40 ppb
20230.800 ppb42ND - 2.10 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
2018-06-13AE298402.10 ppb
2018-08-13AE366821.10 ppb
2018-11-16AE46488ND
2019-01-25AE516741.60 ppb
2019-04-25AE637122.00 ppb
2019-09-26AE84830ND
2019-09-26AE848841.40 ppb
2019-11-20AE899741.30 ppb
2020-01-16AE940022.30 ppb
2020-04-07AF05908ND
2020-09-03AF265102.10 ppb
2020-11-09AF337472.00 ppb
2021-03-24AF48009ND
2021-04-15AF50378ND
2021-08-06AF65399ND
2021-10-05AF722911.10 ppb
2022-02-15AF849281.40 ppb
2022-04-28AF94857ND
2022-07-25AG06038ND
2022-07-25AG06131ND
2022-11-29AG20066ND
2023-01-10AG23781ND
2023-04-17AG369231.10 ppb
2023-09-12AG56046ND
2023-10-03AG582582.10 ppb