Know Your Environment. Protect Your Health.

Chloroform

Hawthorne Army Depot

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.

 

57

Samples

0

Samples exceeding legal limit (MCL)

35

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.88 ppb97ND - 3.10 ppb
20192.54 ppb106ND - 8.70 ppb
20201.06 ppb118ND - 3.40 ppb
20210.331 ppb105ND - 0.910 ppb
20220.463 ppb83ND - 1.70 ppb
20230.828 ppb96ND - 2.20 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
2018-01-041801114-0033.00 ppb
2018-01-041801114-004ND
2018-04-041804260-001ND
2018-04-041804260-0031.70 ppb
2018-07-031807107-0012.90 ppb
2018-07-031807107-0023.10 ppb
2018-08-161808550-0031.20 ppb
2018-10-1118100447-0052.40 ppb
2018-10-1118100447-0042.60 ppb
2019-01-0319010084-001ND
2019-01-0319010084-002ND
2019-04-0419040154-0031.40 ppb
2019-04-0419040154-004ND
2019-07-0319070146-0058.00 ppb
2019-07-0319070146-0060.660 ppb
2019-10-1619100607-0015.50 ppb
2019-10-1619100607-0021.10 ppb
2019-11-2019110646-002ND
2019-11-2019110646-0048.70 ppb
2020-01-3020010826-0020.530 ppb
2020-01-3020010826-0013.40 ppb
2020-04-0920040275-0011.20 ppb
2020-04-0920040275-002ND
2020-04-1620040497-001ND
2020-07-1620070560-0012.50 ppb
2020-07-1620070560-0020.700 ppb
2020-10-152020101604021.60 ppb
2020-10-152020101604010.770 ppb
2020-11-11202011130825ND
2020-11-112020111308241.000 ppb
2021-01-14202101200795ND
2021-01-14202101200794ND
2021-04-082021041400010.530 ppb
2021-04-082021041400020.530 ppb
2021-07-08202107170162ND
2021-07-082021071701640.580 ppb
2021-10-06202110120072ND
2021-11-09202111120034ND
2021-11-172021111908390.760 ppb
2021-11-172021111908380.910 ppb
2022-01-052022011102980.700 ppb
2022-01-05202201110297ND
2022-04-0722040225-001ND
2022-04-0722040225-002ND
2022-07-2722070918-002ND
2022-07-2722070918-0011.70 ppb
2022-10-0422100133-006ND
2022-10-0422100133-0051.30 ppb
2023-01-0423010092-0011.60 ppb
2023-01-0423010092-002ND
2023-04-0523040154-001ND
2023-04-0523040154-0021.30 ppb
2023-07-1223070380-0010.550 ppb
2023-07-1223070380-0022.20 ppb
2023-10-0423100180-0010.880 ppb
2023-10-0423100180-0020.920 ppb
2023-11-2823110681-002ND