Know Your Environment. Protect Your Health.

Bromoform

Thompson Heights 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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.57 ppb84ND - 5.15 ppb
20190.446 ppb82ND - 1.89 ppb
20200.784 ppb82ND - 3.29 ppb
20211.28 ppb84ND - 4.24 ppb
20224.08 ppb86ND - 10.2 ppb
20233.17 ppb86ND - 5.20 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
2018-03-13Q1810521002ND
2018-03-13Q1810521001ND
2018-05-15Q1819954003ND
2018-05-15Q1819954002ND
2018-08-30Q18350610015.09 ppb
2018-08-30Q18350610025.15 ppb
2018-12-04Q18497300011.29 ppb
2018-12-04Q18497300021.03 ppb
2019-02-25Q1907959001ND
2019-02-25Q1907959003ND
2019-05-07Q1922274001ND
2019-05-07Q1922274002ND
2019-09-11Q1964252002ND
2019-09-11Q1964252001ND
2019-11-04Q19750570011.68 ppb
2019-11-04Q19750570021.89 ppb
2020-01-29Q2003557001ND
2020-01-29Q2003557002ND
2020-04-15Q2014956001ND
2020-04-15Q2014956002ND
2020-07-23Q2028995001ND
2020-07-23Q2028995002ND
2020-12-16Q20498570013.29 ppb
2020-12-16Q20498570022.98 ppb
2021-03-22Q21072860013.85 ppb
2021-03-22Q21072860024.24 ppb
2021-06-08Q2115162001ND
2021-06-08Q2115162002ND
2021-09-15Q2125460001ND
2021-09-15Q2125460002ND
2021-11-17Q21322480011.04 ppb
2021-11-17Q21322480021.11 ppb
2022-02-16Q22057350022.60 ppb
2022-02-16Q22057350032.98 ppb
2022-05-17Q2214543001ND
2022-05-17Q2214543002ND
2022-08-17Q22245250013.55 ppb
2022-08-17Q22245250023.31 ppb
2022-11-09Q22338940019.97 ppb
2022-11-09Q223389400210.2 ppb
2023-01-25Q23035670013.64 ppb
2023-01-25Q23035670023.64 ppb
2023-06-14Q2322642001ND
2023-06-14Q2322642002ND
2023-09-06Q23384450023.44 ppb
2023-09-06Q23384450035.20 ppb
2023-11-01Q23468350014.63 ppb
2023-11-01Q23468350024.79 ppb