Know Your Environment. Protect Your Health.

Chloroform

City of San Diego Glossbrenner Unit

NOTE: City of San Diego Glossbrenner Unit purchases water from San Diego Municipal Utility District 1 which is required to test for chloroform. Sample information shown below was taken by San Diego Municipal Utility District 1.

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

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

NOTE: City of San Diego Glossbrenner Unit purchases water from San Diego Municipal Utility District 1 which is required to test for chloroform. Sample information shown below was taken by San Diego Municipal Utility District 1.

Date Lab ID Result
2018-02-12AE13322ND
2018-06-04AE28465ND
2018-06-04AE28555ND
2019-02-11AE53819ND
2019-05-06AE64845ND
2019-05-06AE64908ND
2020-06-04AF14136ND
2020-06-04AF14192ND
2020-06-04AF14196ND
2021-06-07AF57451ND
2021-06-07AF57519ND
2021-07-22AF63070ND
2021-11-29AF77508ND
2021-11-29AF77520ND
2022-01-20AF80982ND
2022-01-20AF81002ND
2022-06-27AG02766ND
2022-09-28AG15441ND
2023-02-22AG29940ND
2023-04-24AG37704ND
2023-05-08AG39542ND
2023-05-08AG39544ND
2023-07-24AG49832ND
2023-11-15AG63792ND