Know Your Environment. Protect Your Health.

Chloroform

Lido-point Lookout Water District

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.

 

50

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND90ND
20200.522 ppb92ND - 2.40 ppb
20210.241 ppb132ND - 2.40 ppb
2022ND110ND
20230.375 ppb21ND - 0.750 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
2018-01-117040219009-POCND
2018-01-117040219008-POCND
2018-07-207058920006-POCND
2018-07-207058920005-POCND
2018-10-117067692006ND
2018-10-117067692005ND
2019-01-237077393003ND
2019-01-237077393004ND
2019-04-187086468008ND
2019-04-187086468009ND
2019-07-097096748006ND
2019-07-097096748007ND
2019-10-1770108828008ND
2019-10-1770108828009ND
2019-10-2497349ND
2020-01-1470118357005ND
2020-01-1470118357006ND
2020-04-2370129041001ND
2020-04-2370129041002ND
2020-09-014714786ND
2020-09-30701477530012.30 ppb
2020-10-0870148838005ND
2020-10-08701488380072.40 ppb
2020-10-0870148838006ND
2021-01-1570159661006ND
2021-01-1570159661005ND
2021-01-15701596610072.40 ppb
2021-06-03701755440050.730 ppb
2021-06-0870176052006ND
2021-06-0870176052007ND
2021-07-1570180617001ND
2021-07-1570180617002ND
2021-07-1570180617003ND
2021-09-07810-1236-1ND
2021-10-2770192508001ND
2021-10-2770192508002ND
2021-10-2770192508004ND
2022-01-2570201886006ND
2022-01-2570201886008ND
2022-01-2570201886007ND
2022-06-1470218200002ND
2022-06-1470218200001ND
2022-07-2170223046005ND
2022-07-2170223046006ND
2022-08-1670226006003ND
2022-10-0670232553002ND
2022-10-0670232553004ND
2022-10-0670232553001ND
2023-09-07810-76999-10.750 ppb
2023-12-2070281775004ND