Know Your Environment. Protect Your Health.

Bromoform

Downsville Water System

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.

 

66

Samples

0

Samples exceeding legal limit (MCL)

30

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND160ND
201917.8 ppb162ND - 142.0 ppb
20201.73 ppb82ND - 8.20 ppb
202119.9 ppb8810.9 ppb - 30.6 ppb
202212.3 ppb10102.20 ppb - 17.1 ppb
202333.0 ppb882.30 ppb - 147.0 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
2018-03-0135377804001ND
2018-03-0135377804002ND
2018-03-0135377804002ND
2018-03-0135377804001ND
2018-06-1835399878002ND
2018-06-1835399878001ND
2018-06-1835399878002ND
2018-06-1835399878001ND
2018-09-1935419425001ND
2018-09-1935419425002ND
2018-09-1935419425001ND
2018-09-1935419425002ND
2018-12-0535435792001ND
2018-12-0535435792001ND
2018-12-0535435792002ND
2018-12-0535435792002ND
2019-03-2035456293001ND
2019-03-2035456293002ND
2019-03-2035456293001ND
2019-03-2035456293002ND
2019-06-0435473929001ND
2019-06-0435473929002ND
2019-06-0435473929001ND
2019-06-0435473929002ND
2019-09-1835499546002ND
2019-09-1835499546001142.0 ppb
2019-09-1835499546001142.0 ppb
2019-09-1835499546002ND
2019-12-0435516906001ND
2019-12-0435516906002ND
2019-12-0435516906002ND
2019-12-0435516906001ND
2020-03-1835538801002ND
2020-03-1835538801001ND
2020-06-1235556378001ND
2020-06-1235556378002ND
2020-09-17355790290015.60 ppb
2020-09-17355790290028.20 ppb
2020-12-0435596675002ND
2020-12-0435596675001ND
2021-03-113561874800121.1 ppb
2021-03-113561874800219.6 ppb
2021-06-043563855300122.4 ppb
2021-06-043563855300227.1 ppb
2021-09-213566575600114.1 ppb
2021-09-213566575600230.6 ppb
2021-12-033568196300113.7 ppb
2021-12-033568196300210.9 ppb
2022-03-033570143500412.1 ppb
2022-03-033570143500310.5 ppb
2022-06-023572242700213.4 ppb
2022-06-023572242700112.8 ppb
2022-06-083572389500116.1 ppb
2022-06-083572389500216.0 ppb
2022-09-15357476070022.20 ppb
2022-09-153574760700117.1 ppb
2022-12-013576378400210.5 ppb
2022-12-013576378400111.9 ppb
2023-03-013578354700110.1 ppb
2023-03-01357835470029.20 ppb
2023-06-1335806763001147.0 ppb
2023-06-133580676300243.4 ppb
2023-09-08358264290012.30 ppb
2023-09-083582642900230.5 ppb
2023-12-063584708500110.1 ppb
2023-12-063584708500211.3 ppb