Know Your Environment. Protect Your Health.

Dibromochloromethane

Port Townsend City Of

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

82

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.200 ppb164ND - 0.900 ppb
2019ND160ND
2020N/A00N/A
20210.113 ppb163ND - 0.700 ppb
20220.150 ppb164ND - 0.700 ppb
2023ND180ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-05-08ND
2018-05-08ND
2018-05-08ND
2018-05-08ND
2018-08-13ND
2018-08-13ND
2018-08-13ND
2018-08-13ND
2018-11-050.900 ppb
2018-11-050.700 ppb
2018-11-050.700 ppb
2018-11-050.900 ppb
2019-02-05ND
2019-02-05ND
2019-02-05ND
2019-02-05ND
2019-05-06ND
2019-05-06ND
2019-05-06ND
2019-05-06ND
2019-08-05ND
2019-08-05ND
2019-08-05ND
2019-08-05ND
2019-10-04ND
2019-11-04ND
2019-11-04ND
2019-11-04ND
2021-02-014075747ND
2021-02-014075755ND
2021-02-014075751ND
2021-02-014075749ND
2021-05-034112907ND
2021-05-034112909ND
2021-05-034112913ND
2021-05-034112911ND
2021-08-094159184ND
2021-08-094159182ND
2021-08-094159186ND
2021-08-094159188ND
2021-11-0842027440.700 ppb
2021-11-0842027510.500 ppb
2021-11-0842027420.600 ppb
2021-11-084202740ND
2022-02-074242017ND
2022-02-074242027ND
2022-02-074242021ND
2022-02-074242014ND
2022-05-094302606ND
2022-05-094302602ND
2022-05-094302604ND
2022-05-094302608ND
2022-08-084335172ND
2022-08-084335176ND
2022-08-084335170ND
2022-08-084335174ND
2022-11-0243765570.500 ppb
2022-11-0243765630.600 ppb
2022-11-0243765610.700 ppb
2022-11-0243765590.600 ppb
2023-02-074451752ND
2023-02-074451748ND
2023-02-074451750ND
2023-02-074451754ND
2023-03-064423224ND
2023-03-064423224ND
2023-05-084457471ND
2023-05-084457465ND
2023-05-084457467ND
2023-05-084457469ND
2023-08-074499453ND
2023-08-074499451ND
2023-08-074499449ND
2023-08-074499455ND
2023-11-134555619ND
2023-11-134555622ND
2023-11-134555613ND
2023-11-134555616ND