Dibromochloromethane
Clarence Water System
Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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 | 0.129 ppb | 16 | 4 | ND - 0.520 ppb |
| 2019 | 0.460 ppb | 16 | 4 | ND - 2.70 ppb |
| 2020 | 0.919 ppb | 8 | 8 | 0.400 ppb - 1.40 ppb |
| 2021 | 2.94 ppb | 10 | 10 | 1.50 ppb - 4.00 ppb |
| 2022 | 2.92 ppb | 8 | 8 | 0.680 ppb - 4.40 ppb |
| 2023 | 1.28 ppb | 8 | 7 | ND - 2.60 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane was 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 and harm to fetal growth and development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-15 | 35380709001 | ND |
| 2018-03-15 | 35380709002 | ND |
| 2018-03-15 | 35380709002 | ND |
| 2018-03-15 | 35380709001 | ND |
| 2018-06-25 | 35401080002 | ND |
| 2018-06-25 | 35401080001 | ND |
| 2018-06-25 | 35401080002 | ND |
| 2018-06-25 | 35401080001 | ND |
| 2018-09-18 | 35418774001 | ND |
| 2018-09-18 | 35418774001 | ND |
| 2018-09-26 | 35420660001 | ND |
| 2018-09-26 | 35420660001 | ND |
| 2018-12-14 | 35438427001 | 0.510 ppb |
| 2018-12-14 | 35438427001 | 0.510 ppb |
| 2018-12-14 | 35438427002 | 0.520 ppb |
| 2018-12-14 | 35438427002 | 0.520 ppb |
| 2019-03-07 | 35453401001 | ND |
| 2019-03-07 | 35453401002 | ND |
| 2019-03-07 | 35453401001 | ND |
| 2019-03-07 | 35453401002 | ND |
| 2019-06-24 | 35478411001 | 2.70 ppb |
| 2019-06-24 | 35478411002 | ND |
| 2019-06-24 | 35478411001 | 2.70 ppb |
| 2019-06-24 | 35478411002 | ND |
| 2019-09-12 | 35497547002 | ND |
| 2019-09-12 | 35497547001 | ND |
| 2019-09-12 | 35497547001 | ND |
| 2019-09-12 | 35497547002 | ND |
| 2019-12-17 | 35520106001 | ND |
| 2019-12-17 | 35520106002 | 0.980 ppb |
| 2019-12-17 | 35520106002 | 0.980 ppb |
| 2019-12-17 | 35520106001 | ND |
| 2020-03-26 | 35540176002 | 0.400 ppb |
| 2020-03-26 | 35540176001 | 0.430 ppb |
| 2020-06-30 | 35560032001 | 1.40 ppb |
| 2020-06-30 | 35560032002 | 1.30 ppb |
| 2020-09-24 | 35580595001 | 1.000 ppb |
| 2020-09-24 | 35580595002 | 0.990 ppb |
| 2020-12-16 | 35600058002 | 0.840 ppb |
| 2020-12-16 | 35600058001 | 0.990 ppb |
| 2021-03-26 | 35621952001 | 3.90 ppb |
| 2021-03-26 | 35621952002 | 2.20 ppb |
| 2021-06-11 | 35640316001 | 1.70 ppb |
| 2021-06-11 | 35640316002 | 1.50 ppb |
| 2021-09-27 | 35667178001 | 3.40 ppb |
| 2021-09-27 | 35667178002 | 3.20 ppb |
| 2021-12-03 | 35681928001 | 3.70 ppb |
| 2021-12-03 | 35681928002 | 4.00 ppb |
| 2021-12-23 | 35687171001 | 2.80 ppb |
| 2021-12-23 | 35687171002 | 3.00 ppb |
| 2022-03-29 | 35707351001 | 2.80 ppb |
| 2022-03-29 | 35707351002 | 2.80 ppb |
| 2022-06-16 | 35726148002 | 2.10 ppb |
| 2022-06-16 | 35726148001 | 0.680 ppb |
| 2022-09-26 | 35749445001 | 4.20 ppb |
| 2022-09-26 | 35749445002 | 4.40 ppb |
| 2022-12-12 | 35767464001 | 3.10 ppb |
| 2022-12-12 | 35767464002 | 3.30 ppb |
| 2023-03-22 | 35788159001 | ND |
| 2023-03-22 | 35788159002 | 0.650 ppb |
| 2023-06-26 | 35809995001 | 1.10 ppb |
| 2023-06-26 | 35809995002 | 1.50 ppb |
| 2023-09-18 | 35829707001 | 1.10 ppb |
| 2023-09-18 | 35829707002 | 1.70 ppb |
| 2023-12-06 | 35847061001 | 1.60 ppb |
| 2023-12-06 | 35847061002 | 2.60 ppb |