Know Your Environment. Protect Your Health.

Bromoform

City of Dawson

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.716 ppb84ND - 1.57 ppb
2019ND80ND
2020ND80ND
2021ND80ND
20222.13 ppb881.01 ppb - 3.58 ppb
20231.05 ppb86ND - 1.73 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
2018-02-08Q1805369002ND
2018-02-08Q1805369001ND
2018-04-19Q18161130031.33 ppb
2018-04-19Q18161130021.57 ppb
2018-07-17Q18285890011.41 ppb
2018-07-17Q18285890021.42 ppb
2018-10-25Q1842774001ND
2018-10-25Q1842774002ND
2019-02-06Q1905803001ND
2019-02-06Q1905803003ND
2019-04-18Q1915788001ND
2019-04-18Q1915788002ND
2019-07-31Q1949398002ND
2019-07-31Q1949398001ND
2019-10-17Q1972991001ND
2019-10-17Q1972991002ND
2020-01-29Q2003550001ND
2020-01-29Q2003550002ND
2020-04-14Q2014700002ND
2020-04-14Q2014700003ND
2020-08-04Q2030367001ND
2020-08-04Q2030367002ND
2020-10-23Q2041393001ND
2020-10-23Q2041393002ND
2021-01-12Q2100674002ND
2021-01-12Q2100674003ND
2021-04-08Q2109060001ND
2021-04-08Q2109060002ND
2021-07-08Q2117924001ND
2021-07-08Q2117924002ND
2021-10-11Q2128077001ND
2021-10-11Q2128077002ND
2022-03-15Q22088920021.01 ppb
2022-03-15Q22088920031.07 ppb
2022-05-03Q22134490011.99 ppb
2022-05-03Q22134490021.92 ppb
2022-08-17Q22243460011.92 ppb
2022-08-17Q22243460021.98 ppb
2022-11-15Q22343100013.58 ppb
2022-11-15Q22343100023.57 ppb
2023-02-15Q23062940021.09 ppb
2023-02-15Q23062940031.08 ppb
2023-05-31Q2320351001ND
2023-05-31Q2320351002ND
2023-07-24Q23292300011.47 ppb
2023-07-24Q23292300021.43 ppb
2023-10-31Q23465420011.73 ppb
2023-10-31Q23465420021.60 ppb