Know Your Environment. Protect Your Health.

Chloroform

China Lake Naval Air Weapons Station

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.883 ppb43ND - 1.40 ppb
20190.143 ppb41ND - 0.570 ppb
2020ND40ND
2021ND40ND
20220.143 ppb71ND - 1.000 ppb
20230.157 ppb71ND - 1.10 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
2018-07-25CA1510703_DST_901-2018072507001.40 ppb
2018-07-25CA1510703_DST_904-201807250830ND
2018-07-25CA1510703_DST_903-2018072507051.40 ppb
2018-07-25CA1510703_DST_902-2018072507300.730 ppb
2019-09-17CA1510703_DST_904-201909171010ND
2019-09-17CA1510703_DST_902-2019091708350.570 ppb
2019-09-17CA1510703_DST_901-201909170900ND
2019-09-17CA1510703_DST_903-201909170900ND
2020-11-16CA1510703_DST_904-202011160925ND
2020-11-16CA1510703_DST_902-202011161020ND
2020-11-16CA1510703_DST_901-202011160955ND
2020-11-16CA1510703_DST_903-202011160955ND
2021-07-27CA1510703_DST_904-202107270754ND
2021-07-27CA1510703_DST_901-202107270903ND
2021-07-27CA1510703_DST_903-202107270933ND
2021-07-27CA1510703_DST_902-202107270843ND
2022-06-28CA1510703_043_043-202206280900ND
2022-07-05CA1510703_DST_904-2022070509441.000 ppb
2022-07-05CA1510703_DST_902-202207050800ND
2022-07-05CA1510703_DST_901-202207050735ND
2022-07-05CA1510703_DST_903-202207050902ND
2022-09-05CA1510703_043_043-202209050939ND
2022-11-08CA1510703_043_043-202211080845ND
2023-01-24CA1510703_043_043-202301240755ND
2023-04-11CA1510703_043_043-202304110856ND
2023-07-11CA1510703_DST_901-202307110918ND
2023-07-11CA1510703_DST_902-2023071109341.10 ppb
2023-07-11CA1510703_DST_904-202307110825ND
2023-07-11CA1510703_DST_903-202307110840ND
2023-11-07CA1510703_043_043-202311070917ND