Know Your Environment. Protect Your Health.

Chloroform

Colony Heights Condominium

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.633 ppb32ND - 1.10 ppb
20190.470 ppb32ND - 0.810 ppb
20200.823 ppb32ND - 1.26 ppb
20210.600 ppb110.600 ppb
20221.60 ppb330.600 ppb - 2.40 ppb
20231.23 ppb330.800 ppb - 2.10 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 Result
2018-01-03ND
2018-08-080.800 ppb
2018-08-081.10 ppb
2019-01-09ND
2019-08-200.600 ppb
2019-08-200.810 ppb
2020-03-18ND
2020-08-211.21 ppb
2020-08-211.26 ppb
2021-03-230.600 ppb
2022-03-151.80 ppb
2022-07-292.40 ppb
2022-08-080.600 ppb
2023-03-202.10 ppb
2023-08-210.800 ppb
2023-08-210.800 ppb