Know Your Environment. Protect Your Health.

Bromoform

Port Angeles Composite

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

 

46

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.144 ppb91ND - 1.30 ppb
2019ND90ND
2020N/A00N/A
20210.330 ppb102ND - 2.20 ppb
2022ND90ND
20230.767 ppb93ND - 3.00 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is 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, harm to reproduction and child development, and change to fetal growth and development .

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-14ND
2018-02-14ND
2018-05-16ND
2018-05-16ND
2018-08-17ND
2018-08-20ND
2018-10-16ND
2018-11-14ND
2018-11-141.30 ppb
2019-02-19ND
2019-02-19ND
2019-05-09ND
2019-05-09ND
2019-05-09ND
2019-08-19ND
2019-08-19ND
2019-11-20ND
2019-11-20ND
2021-02-234081147ND
2021-02-234081109ND
2021-04-264108278ND
2021-05-244120062ND
2021-05-244120064ND
2021-08-244166229ND
2021-08-254166227ND
2021-09-2341871421.10 ppb
2021-11-2342204022.20 ppb
2021-11-234220400ND
2022-02-244247463ND
2022-02-244247476ND
2022-05-094302610ND
2022-06-304309418ND
2022-08-224339640ND
2022-08-224339645ND
2022-09-274364656ND
2022-11-284389319ND
2022-11-284389312ND
2023-02-064415131ND
2023-02-064415133ND
2023-05-094457481ND
2023-05-094457479ND
2023-08-144506970ND
2023-08-1445069682.80 ppb
2023-08-2345122131.10 ppb
2023-11-084547325ND
2023-11-0845473273.00 ppb