Bromoform
St Charles Water District 1 East Bank
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 32 | 0 | ND |
| 2019 | ND | 64 | 0 | ND |
| 2020 | 0.0766 ppb | 32 | 6 | ND - 0.440 ppb |
| 2021 | 0.0259 ppb | 32 | 2 | ND - 0.450 ppb |
| 2022 | 0.188 ppb | 32 | 10 | ND - 0.900 ppb |
| 2023 | 0.174 ppb | 32 | 9 | ND - 0.910 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 |
|---|---|---|
| 2018-03-13 | 35380152001 | ND |
| 2018-03-13 | 35380152002 | ND |
| 2018-03-13 | 35380152003 | ND |
| 2018-03-13 | 35380152004 | ND |
| 2018-03-13 | 35380152001 | ND |
| 2018-03-13 | 35380152002 | ND |
| 2018-03-13 | 35380152003 | ND |
| 2018-03-13 | 35380152004 | ND |
| 2018-06-12 | 35398121001 | ND |
| 2018-06-12 | 35398121002 | ND |
| 2018-06-12 | 35398121003 | ND |
| 2018-06-12 | 35398121004 | ND |
| 2018-06-12 | 35398121001 | ND |
| 2018-06-12 | 35398121002 | ND |
| 2018-06-12 | 35398121003 | ND |
| 2018-06-12 | 35398121004 | ND |
| 2018-09-20 | 35419460001 | ND |
| 2018-09-20 | 35419460002 | ND |
| 2018-09-20 | 35419460003 | ND |
| 2018-09-20 | 35419460004 | ND |
| 2018-09-20 | 35419460001 | ND |
| 2018-09-20 | 35419460002 | ND |
| 2018-09-20 | 35419460003 | ND |
| 2018-09-20 | 35419460004 | ND |
| 2018-12-13 | 35437252001 | ND |
| 2018-12-13 | 35437252002 | ND |
| 2018-12-13 | 35437252003 | ND |
| 2018-12-13 | 35437252004 | ND |
| 2018-12-13 | 35437252001 | ND |
| 2018-12-13 | 35437252002 | ND |
| 2018-12-13 | 35437252003 | ND |
| 2018-12-13 | 35437252004 | ND |
| 2019-03-14 | 35454705001 | ND |
| 2019-03-14 | 35454705002 | ND |
| 2019-03-14 | 35454705003 | ND |
| 2019-03-14 | 35454705004 | ND |
| 2019-03-14 | 35454705001 | ND |
| 2019-03-14 | 35454705002 | ND |
| 2019-03-14 | 35454705003 | ND |
| 2019-03-14 | 35454705004 | ND |
| 2019-06-12 | 35475693001 | ND |
| 2019-06-12 | 35475693002 | ND |
| 2019-06-12 | 35475693003 | ND |
| 2019-06-12 | 35475693004 | ND |
| 2019-06-12 | 35475693001 | ND |
| 2019-06-12 | 35475693002 | ND |
| 2019-06-12 | 35475693003 | ND |
| 2019-06-12 | 35475693004 | ND |
| 2019-09-05 | 35495203001 | ND |
| 2019-09-05 | 35495203002 | ND |
| 2019-09-05 | 35495203003 | ND |
| 2019-09-05 | 35495203004 | ND |
| 2019-09-05 | 35495203005 | ND |
| 2019-09-05 | 35495203006 | ND |
| 2019-09-05 | 35495203007 | ND |
| 2019-09-05 | 35495203008 | ND |
| 2019-09-05 | 35495203001 | ND |
| 2019-09-05 | 35495203002 | ND |
| 2019-09-05 | 35495203003 | ND |
| 2019-09-05 | 35495203004 | ND |
| 2019-09-05 | 35495203005 | ND |
| 2019-09-05 | 35495203006 | ND |
| 2019-09-05 | 35495203007 | ND |
| 2019-09-05 | 35495203008 | ND |
| 2019-10-10 | 35504423001 | ND |
| 2019-10-10 | 35504423002 | ND |
| 2019-10-10 | 35504423003 | ND |
| 2019-10-10 | 35504423004 | ND |
| 2019-10-10 | 35504423005 | ND |
| 2019-10-10 | 35504423006 | ND |
| 2019-10-10 | 35504423007 | ND |
| 2019-10-10 | 35504423008 | ND |
| 2019-10-10 | 35504423001 | ND |
| 2019-10-10 | 35504423002 | ND |
| 2019-10-10 | 35504423003 | ND |
| 2019-10-10 | 35504423004 | ND |
| 2019-10-10 | 35504423005 | ND |
| 2019-10-10 | 35504423006 | ND |
| 2019-10-10 | 35504423007 | ND |
| 2019-10-10 | 35504423008 | ND |
| 2019-12-10 | 35518126001 | ND |
| 2019-12-10 | 35518126002 | ND |
| 2019-12-10 | 35518126003 | ND |
| 2019-12-10 | 35518126004 | ND |
| 2019-12-10 | 35518126005 | ND |
| 2019-12-10 | 35518126006 | ND |
| 2019-12-10 | 35518126007 | ND |
| 2019-12-10 | 35518126008 | ND |
| 2019-12-10 | 35518126001 | ND |
| 2019-12-10 | 35518126002 | ND |
| 2019-12-10 | 35518126003 | ND |
| 2019-12-10 | 35518126004 | ND |
| 2019-12-10 | 35518126005 | ND |
| 2019-12-10 | 35518126006 | ND |
| 2019-12-10 | 35518126007 | ND |
| 2019-12-10 | 35518126008 | ND |
| 2020-03-05 | 35535524001 | ND |
| 2020-03-05 | 35535524002 | ND |
| 2020-03-05 | 35535524003 | ND |
| 2020-03-05 | 35535524004 | ND |
| 2020-03-05 | 35535524005 | ND |
| 2020-03-05 | 35535524006 | ND |
| 2020-03-05 | 35535524007 | ND |
| 2020-03-05 | 35535524008 | ND |
| 2020-06-18 | 35557773001 | ND |
| 2020-06-18 | 35557773002 | ND |
| 2020-06-18 | 35557773003 | ND |
| 2020-06-18 | 35557773004 | ND |
| 2020-06-18 | 35557773005 | ND |
| 2020-06-18 | 35557773006 | ND |
| 2020-06-18 | 35557773007 | ND |
| 2020-06-18 | 35557773008 | ND |
| 2020-09-18 | 35579010001 | ND |
| 2020-09-18 | 35579010002 | ND |
| 2020-09-18 | 35579010003 | 0.400 ppb |
| 2020-09-18 | 35579010004 | 0.420 ppb |
| 2020-09-18 | 35579010005 | 0.420 ppb |
| 2020-09-18 | 35579010006 | 0.440 ppb |
| 2020-09-18 | 35579010007 | 0.390 ppb |
| 2020-09-18 | 35579010008 | 0.380 ppb |
| 2020-12-11 | 35598546001 | ND |
| 2020-12-11 | 35598546002 | ND |
| 2020-12-11 | 35598546003 | ND |
| 2020-12-11 | 35598546004 | ND |
| 2020-12-11 | 35598546005 | ND |
| 2020-12-11 | 35598546006 | ND |
| 2020-12-11 | 35598546007 | ND |
| 2020-12-11 | 35598546008 | ND |
| 2021-03-11 | 35618677001 | ND |
| 2021-03-11 | 35618677002 | ND |
| 2021-03-11 | 35618677003 | ND |
| 2021-03-11 | 35618677004 | ND |
| 2021-03-11 | 35618677005 | ND |
| 2021-03-11 | 35618677006 | ND |
| 2021-03-11 | 35618677007 | ND |
| 2021-03-11 | 35618677008 | ND |
| 2021-06-09 | 35639743001 | ND |
| 2021-06-09 | 35639743002 | ND |
| 2021-06-09 | 35639743003 | ND |
| 2021-06-09 | 35639743004 | ND |
| 2021-06-09 | 35639743005 | ND |
| 2021-06-09 | 35639743006 | ND |
| 2021-06-09 | 35639743007 | ND |
| 2021-06-09 | 35639743008 | ND |
| 2021-09-22 | 35666065001 | ND |
| 2021-09-22 | 35666065002 | ND |
| 2021-09-22 | 35666065003 | ND |
| 2021-09-22 | 35666065004 | ND |
| 2021-09-22 | 35666065005 | ND |
| 2021-09-22 | 35666065006 | ND |
| 2021-09-22 | 35666065007 | ND |
| 2021-09-22 | 35666065008 | ND |
| 2021-12-21 | 35685949001 | ND |
| 2021-12-21 | 35685949002 | ND |
| 2021-12-21 | 35685949003 | ND |
| 2021-12-21 | 35685949004 | ND |
| 2021-12-21 | 35685949005 | 0.380 ppb |
| 2021-12-21 | 35685949006 | ND |
| 2021-12-21 | 35685949007 | ND |
| 2021-12-21 | 35685949008 | 0.450 ppb |
| 2022-03-02 | 35701560001 | ND |
| 2022-03-02 | 35701560002 | ND |
| 2022-03-02 | 35701560003 | ND |
| 2022-03-02 | 35701560004 | ND |
| 2022-03-02 | 35701560005 | ND |
| 2022-03-02 | 35701560006 | ND |
| 2022-03-02 | 35701560007 | ND |
| 2022-03-02 | 35701560008 | ND |
| 2022-06-09 | 35725756001 | ND |
| 2022-06-09 | 35725756002 | ND |
| 2022-06-09 | 35725756003 | ND |
| 2022-06-09 | 35725756004 | ND |
| 2022-06-09 | 35725756005 | ND |
| 2022-06-09 | 35725756006 | ND |
| 2022-06-09 | 35725756007 | ND |
| 2022-06-09 | 35725756008 | ND |
| 2022-09-15 | 35747218001 | ND |
| 2022-09-15 | 35747218002 | 0.740 ppb |
| 2022-09-15 | 35747218003 | ND |
| 2022-09-15 | 35747218004 | ND |
| 2022-09-15 | 35747218005 | ND |
| 2022-09-15 | 35747218006 | 0.860 ppb |
| 2022-09-15 | 35747218007 | 0.900 ppb |
| 2022-09-15 | 35747218008 | 0.860 ppb |
| 2022-12-15 | 35767203001 | 0.360 ppb |
| 2022-12-15 | 35767203002 | ND |
| 2022-12-15 | 35767203003 | ND |
| 2022-12-15 | 35767203004 | 0.510 ppb |
| 2022-12-15 | 35767203005 | 0.430 ppb |
| 2022-12-15 | 35767203006 | 0.400 ppb |
| 2022-12-15 | 35767203007 | 0.530 ppb |
| 2022-12-15 | 35767203008 | 0.440 ppb |
| 2023-03-14 | 35785900001 | ND |
| 2023-03-14 | 35785900002 | ND |
| 2023-03-14 | 35785900003 | ND |
| 2023-03-14 | 35785900004 | ND |
| 2023-03-14 | 35785900005 | ND |
| 2023-03-14 | 35785900006 | ND |
| 2023-03-14 | 35785900007 | ND |
| 2023-03-14 | 35785900008 | ND |
| 2023-06-09 | 35805553001 | ND |
| 2023-06-09 | 35805553002 | ND |
| 2023-06-09 | 35805553003 | ND |
| 2023-06-09 | 35805553004 | ND |
| 2023-06-09 | 35805553005 | ND |
| 2023-06-09 | 35805553006 | ND |
| 2023-06-09 | 35805553007 | ND |
| 2023-06-09 | 35805553008 | ND |
| 2023-09-06 | 35826117001 | ND |
| 2023-09-06 | 35826117002 | ND |
| 2023-09-06 | 35826117003 | ND |
| 2023-09-06 | 35826117004 | ND |
| 2023-09-06 | 35826117005 | ND |
| 2023-09-06 | 35826117006 | ND |
| 2023-09-06 | 35826117007 | ND |
| 2023-09-06 | 35826117008 | 0.400 ppb |
| 2023-12-19 | 35849365001 | 0.720 ppb |
| 2023-12-19 | 35849365002 | 0.620 ppb |
| 2023-12-19 | 35849365003 | 0.910 ppb |
| 2023-12-19 | 35849365004 | 0.670 ppb |
| 2023-12-19 | 35849365005 | 0.520 ppb |
| 2023-12-19 | 35849365006 | 0.550 ppb |
| 2023-12-19 | 35849365007 | 0.630 ppb |
| 2023-12-19 | 35849365008 | 0.550 ppb |