Know Your Environment. Protect Your Health.

Chloroform

Swan Harbour Dell Mobile Home Park

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.46 ppb550.557 ppb - 9.21 ppb
20190.592 ppb550.510 ppb - 0.670 ppb
20200.630 ppb330.530 ppb - 0.690 ppb
20210.710 ppb330.640 ppb - 0.750 ppb
20221.24 ppb221.03 ppb - 1.45 ppb
20232.92 ppb440.970 ppb - 7.74 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
2018-06-14E180045100040.660 ppb
2018-09-13E190009400089.21 ppb
2018-09-19D-18-21060.619 ppb
2018-09-19D-18-21070.557 ppb
2018-09-27E190011180081.23 ppb
2019-03-12D-19-493ABC0.600 ppb
2019-03-26E190031450040.610 ppb
2019-06-05D-19-1247ABC0.670 ppb
2019-06-26E190044930020.570 ppb
2019-08-13D-19-19070.510 ppb
2020-03-30E200032800040.530 ppb
2020-05-12E200035610060.690 ppb
2020-11-05E210025820010.670 ppb
2021-06-02E210035660060.740 ppb
2021-09-23E220009640080.750 ppb
2021-11-09E22000802060.640 ppb
2022-01-19D-22-1241.45 ppb
2022-10-17D-22-21011.03 ppb
2023-03-08E23002089011.46 ppb
2023-05-08E23002742011.50 ppb
2023-08-10E24000504010.970 ppb
2023-10-25E24001567017.74 ppb