Know Your Environment. Protect Your Health.

Chloroform

Elsberry PWS

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.59 ppb21ND - 7.18 ppb
20190.765 ppb21ND - 1.53 ppb
20200.275 ppb41ND - 1.10 ppb
20210.438 ppb41ND - 1.75 ppb
20220.703 ppb42ND - 2.13 ppb
20231.42 ppb42ND - 4.64 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
2018-05-14AD18724ND
2018-09-25AD330697.18 ppb
2019-04-24AD46827ND
2019-09-30AD553741.53 ppb
2020-04-292004614ND
2020-04-292004615ND
2020-04-292004616ND
2020-09-1620151451.10 ppb
2021-04-272104195ND
2021-04-272104196ND
2021-04-272104194ND
2021-09-2721170431.75 ppb
2022-04-212204850ND
2022-04-2122048480.680 ppb
2022-04-212204849ND
2022-10-1922184882.13 ppb
2023-04-1923038961.04 ppb
2023-04-192303895ND
2023-04-192303897ND
2023-09-2723154504.64 ppb