Bromoform
Ringwood Water Department
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 | 0.360 ppb | 11 | 6 | ND - 0.830 ppb |
| 2019 | 0.148 ppb | 8 | 2 | ND - 0.620 ppb |
| 2020 | 0.640 ppb | 8 | 6 | ND - 1.000 ppb |
| 2021 | 0.381 ppb | 11 | 6 | ND - 0.810 ppb |
| 2022 | 0.333 ppb | 8 | 4 | ND - 0.730 ppb |
| 2023 | 0.603 ppb | 9 | 8 | ND - 0.830 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 |
|---|---|---|
| 2018-02-19 | DWS7876-2 | 0.530 ppb |
| 2018-02-19 | DWS7876-1 | 0.690 ppb |
| 2018-05-09 | DWS8634-2 | ND |
| 2018-05-09 | DWS8634-3 | ND |
| 2018-05-09 | DWS8634-1 | ND |
| 2018-05-17 | DWS8713-1 | 0.830 ppb |
| 2018-05-17 | DWS8713-2 | 0.670 ppb |
| 2018-08-20 | 2335224001 | ND |
| 2018-08-20 | 2335224002 | ND |
| 2018-11-19 | 18111624-01 | 0.670 ppb |
| 2018-11-19 | 18111624-02 | 0.570 ppb |
| 2019-02-18 | 19021555-01 | ND |
| 2019-02-18 | 19021555-02 | ND |
| 2019-05-17 | 7090480001-THM | ND |
| 2019-05-17 | 7090480002-THM | ND |
| 2019-08-19 | 19081721-001 | 0.620 ppb |
| 2019-08-19 | 19081721-002 | ND |
| 2019-11-18 | 19111513-001 | ND |
| 2019-11-18 | 19111513-002 | 0.560 ppb |
| 2020-02-18 | 20021710-001 | 0.600 ppb |
| 2020-02-18 | 20021710-002 | ND |
| 2020-05-18 | 20051521-001 | 0.840 ppb |
| 2020-05-18 | 20051521-002 | ND |
| 2020-08-20 | 20081937-001 | 1.000 ppb |
| 2020-08-20 | 20081937-002 | 0.870 ppb |
| 2020-11-19 | 20111829-001 | 0.900 ppb |
| 2020-11-19 | 20111829-002 | 0.910 ppb |
| 2021-02-19 | 21021815-001 | ND |
| 2021-02-19 | 21021815-002 | ND |
| 2021-05-17 | 21051702-001 | 0.680 ppb |
| 2021-05-17 | 21051702-002 | 0.670 ppb |
| 2021-06-01 | 21053109-001 | ND |
| 2021-06-01 | 21053109-002 | ND |
| 2021-06-01 | 21053109-003 | ND |
| 2021-08-17 | 210816047-001 | 0.750 ppb |
| 2021-08-17 | 210816047-002 | 0.810 ppb |
| 2021-11-17 | 211116026-001 | 0.660 ppb |
| 2021-11-17 | 211116026-002 | 0.620 ppb |
| 2022-02-17 | 220216023-001 | ND |
| 2022-02-17 | 220216023-002 | ND |
| 2022-05-17 | 220515022-002 | ND |
| 2022-05-17 | 220515022-001 | ND |
| 2022-08-17 | 220816030-001 | 0.650 ppb |
| 2022-08-17 | 220816030-002 | 0.610 ppb |
| 2022-11-18 | 221117015-001 | 0.670 ppb |
| 2022-11-18 | 221117015-002 | 0.730 ppb |
| 2023-02-21 | 230220034-001 | 0.790 ppb |
| 2023-02-21 | 230220034-002 | 0.830 ppb |
| 2023-05-17 | 230516030-001 | 0.640 ppb |
| 2023-05-17 | 230516030-002 | 0.510 ppb |
| 2023-08-17 | 230816059-001 | 0.810 ppb |
| 2023-08-17 | 230816059-002 | 0.620 ppb |
| 2023-11-20 | 231116019-001 | 0.640 ppb |
| 2023-11-20 | 231116019-002 | 0.590 ppb |
| 2023-11-28 | 231127045-001B | ND |