Know Your Environment. Protect Your Health.

Bromoform

Patterson 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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND160ND
2019ND160ND
2020ND80ND
2021ND80ND
2022ND80ND
20230.0525 ppb81ND - 0.420 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
2018-01-1135368137001ND
2018-01-1135368137002ND
2018-01-1135368137002ND
2018-01-1135368137001ND
2018-04-1035385303002ND
2018-04-1035385303001ND
2018-04-1035385303002ND
2018-04-1035385303001ND
2018-07-0235401876001ND
2018-07-0235401876002ND
2018-07-0235401876001ND
2018-07-0235401876002ND
2018-10-1135424008001ND
2018-10-1135424008001ND
2018-10-1135424008002ND
2018-10-1135424008002ND
2019-01-1035441799001ND
2019-01-1035441799002ND
2019-01-1035441799001ND
2019-01-1035441799002ND
2019-04-0335459640001ND
2019-04-0335459640002ND
2019-04-0335459640001ND
2019-04-0335459640002ND
2019-07-1135481774002ND
2019-07-1135481774001ND
2019-07-1135481774001ND
2019-07-1135481774002ND
2019-10-0335502565001ND
2019-10-0335502565002ND
2019-10-0335502565002ND
2019-10-0335502565001ND
2020-01-1735525179002ND
2020-01-1735525179001ND
2020-04-0235541335001ND
2020-04-0235541335002ND
2020-07-0235560496001ND
2020-07-0235560496002ND
2020-10-0135582015001ND
2020-10-0135582015002ND
2021-01-0835603471002ND
2021-03-1835620544001ND
2021-04-0935625103001ND
2021-04-0935625103002ND
2021-07-0235644918001ND
2021-07-0235644918002ND
2021-10-1435672947001ND
2021-10-1435672947002ND
2022-01-1335690775002ND
2022-01-1335690775001ND
2022-04-0735709210002ND
2022-04-0735709210001ND
2022-07-0835732700002ND
2022-07-0835732700001ND
2022-10-0635751451002ND
2022-10-0635751451001ND
2023-01-1235772533001ND
2023-01-1235772533002ND
2023-04-0535790525001ND
2023-04-0535790525002ND
2023-07-1735813820001ND
2023-07-1735813820002ND
2023-10-24358375240010.420 ppb
2023-10-2435837524002ND