Know Your Environment. Protect Your Health.

Bromoform

Humboldt, City of

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.150 ppb41ND - 0.600 ppb
2019ND40ND
2020ND40ND
2021ND40ND
20226.22 ppb42ND - 24.0 ppb
20230.780 ppb43ND - 1.40 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
2018-01-159062740.600 ppb
2018-04-16938542ND
2018-07-151006277ND
2018-10-151061539ND
2019-01-141104859ND
2019-04-081139843ND
2019-07-081199633ND
2019-10-071256533ND
2020-01-131308959ND
2020-04-131356590ND
2020-07-061429629ND
2020-10-051576170ND
2021-01-111739302ND
2021-04-051811242ND
2021-07-121880829ND
2021-10-041978105ND
2022-01-0321023270.870 ppb
2022-04-042229851ND
2022-07-112299635ND
2022-10-10237639624.0 ppb
2023-01-092429101ND
2023-04-1024804270.720 ppb
2023-07-1025331791.000 ppb
2023-10-0225856571.40 ppb