Bromodichloromethane
City of Lancaster
Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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 | 7.41 ppb | 41 | 41 | 3.20 ppb - 15.0 ppb |
| 2019 | 9.06 ppb | 34 | 34 | 2.40 ppb - 21.5 ppb |
| 2020 | 10.7 ppb | 42 | 42 | 3.80 ppb - 23.3 ppb |
| 2021 | 10.5 ppb | 48 | 48 | 3.70 ppb - 34.7 ppb |
| 2022 | 10.2 ppb | 64 | 64 | 3.90 ppb - 26.4 ppb |
| 2023 | 11.0 ppb | 63 | 63 | 3.70 ppb - 22.6 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 |
|---|---|---|
| 2018-02-06 | 8002953-02 | 4.40 ppb |
| 2018-02-06 | 8002953-05 | 6.80 ppb |
| 2018-02-06 | 8002953-06 | 5.50 ppb |
| 2018-02-06 | 8002953-07 | 5.90 ppb |
| 2018-02-08 | 8002953-01 | 7.80 ppb |
| 2018-02-08 | 8002953-03 | 6.40 ppb |
| 2018-02-08 | 8002953-04 | 4.90 ppb |
| 2018-02-08 | 8002953-08 | 5.60 ppb |
| 2018-03-13 | 2302431001 | 5.60 ppb |
| 2018-04-10 | 2308677001 | 6.20 ppb |
| 2018-05-07 | 2314140001 | 10.00 ppb |
| 2018-05-07 | 2314140005 | 10.6 ppb |
| 2018-05-07 | 2314140006 | 9.90 ppb |
| 2018-05-07 | 2314140007 | 8.10 ppb |
| 2018-05-07 | 2314140008 | 7.70 ppb |
| 2018-05-08 | 2314140002 | 7.80 ppb |
| 2018-05-08 | 2314140003 | 8.60 ppb |
| 2018-05-08 | 2314140004 | 7.60 ppb |
| 2018-08-06 | 2331578002 | 7.60 ppb |
| 2018-08-06 | 2331578003 | 11.0 ppb |
| 2018-08-06 | 2331578004 | 8.30 ppb |
| 2018-08-06 | 2331578005 | 10.2 ppb |
| 2018-08-07 | 2331578006 | 7.50 ppb |
| 2018-08-07 | 2331578007 | 10.00 ppb |
| 2018-08-07 | 2331578008 | 9.80 ppb |
| 2018-08-08 | 2331578001 | 15.0 ppb |
| 2018-09-25 | 2341035001 | 9.00 ppb |
| 2018-09-25 | 2341035002 | 7.80 ppb |
| 2018-11-07 | 2349167001 | 9.60 ppb |
| 2018-11-07 | 2349167003 | 7.80 ppb |
| 2018-11-07 | 2349167004 | 7.40 ppb |
| 2018-11-07 | 2349167005 | 8.20 ppb |
| 2018-11-08 | 2349167002 | 5.20 ppb |
| 2018-11-08 | 2349167006 | 8.30 ppb |
| 2018-11-08 | 2349167007 | 6.80 ppb |
| 2018-11-08 | 2349167008 | 6.20 ppb |
| 2018-12-12 | 3006044002 | 4.00 ppb |
| 2018-12-12 | 3006044003 | 3.40 ppb |
| 2018-12-12 | 3006044004 | 4.00 ppb |
| 2018-12-12 | 3006044005 | 3.20 ppb |
| 2018-12-12 | 3006044006 | 4.30 ppb |
| 2019-02-06 | 3015556002 | 3.90 ppb |
| 2019-02-06 | 3015556004 | 3.10 ppb |
| 2019-02-06 | 3015556005 | 3.10 ppb |
| 2019-02-06 | 3015556006 | 2.40 ppb |
| 2019-02-06 | 3015556007 | 3.60 ppb |
| 2019-02-07 | 3015556001 | 4.40 ppb |
| 2019-02-07 | 3015556003 | 4.30 ppb |
| 2019-02-07 | 3015556008 | 3.00 ppb |
| 2019-05-06 | 3032689001 | 9.10 ppb |
| 2019-05-06 | 3032689002 | 5.80 ppb |
| 2019-05-06 | 3032689004 | 6.40 ppb |
| 2019-05-06 | 3032689005 | 7.70 ppb |
| 2019-05-07 | 3032689003 | 7.10 ppb |
| 2019-05-07 | 3032689006 | 9.00 ppb |
| 2019-05-07 | 3032689007 | 6.40 ppb |
| 2019-05-07 | 3032689008 | 8.50 ppb |
| 2019-08-06 | 3050286002 | 16.3 ppb |
| 2019-08-06 | 3050286003 | 21.5 ppb |
| 2019-08-06 | 3050286004 | 16.7 ppb |
| 2019-08-06 | 3050286006 | 12.7 ppb |
| 2019-08-07 | 3050286001 | 20.1 ppb |
| 2019-08-07 | 3050286005 | 13.6 ppb |
| 2019-08-07 | 3050286007 | 18.6 ppb |
| 2019-08-07 | 3050286008 | 17.6 ppb |
| 2019-09-17 | 3058859001 | 21.4 ppb |
| 2019-11-07 | 3068920001 | 11.5 ppb |
| 2019-11-07 | 3068920002 | 6.90 ppb |
| 2019-11-07 | 3068920003 | 4.30 ppb |
| 2019-11-07 | 3068920004 | 8.50 ppb |
| 2019-11-07 | 3068920005 | 6.10 ppb |
| 2019-11-08 | 3069998001 | 3.40 ppb |
| 2019-11-08 | 3069998002 | 9.60 ppb |
| 2019-11-08 | 3069998003 | 4.70 ppb |
| 2019-12-18 | 3076613001 | 6.70 ppb |
| 2020-02-10 | 5.10 ppb | |
| 2020-02-10 | 7.40 ppb | |
| 2020-02-10 | 6.80 ppb | |
| 2020-02-10 | 7.20 ppb | |
| 2020-02-10 | 6.00 ppb | |
| 2020-02-11 | 7.20 ppb | |
| 2020-02-11 | 4.80 ppb | |
| 2020-02-11 | 7.00 ppb | |
| 2020-05-06 | 7.50 ppb | |
| 2020-05-06 | 6.40 ppb | |
| 2020-05-06 | 7.70 ppb | |
| 2020-05-06 | 9.10 ppb | |
| 2020-05-07 | 4.60 ppb | |
| 2020-05-07 | 6.40 ppb | |
| 2020-05-07 | 3.80 ppb | |
| 2020-05-07 | 5.20 ppb | |
| 2020-08-10 | 21.8 ppb | |
| 2020-08-10 | 23.3 ppb | |
| 2020-08-10 | 11.5 ppb | |
| 2020-08-11 | 18.0 ppb | |
| 2020-08-11 | 16.1 ppb | |
| 2020-08-11 | 11.0 ppb | |
| 2020-08-11 | 15.2 ppb | |
| 2020-08-11 | 18.6 ppb | |
| 2020-09-29 | 14.8 ppb | |
| 2020-09-29 | 18.4 ppb | |
| 2020-09-29 | 11.3 ppb | |
| 2020-09-29 | 11.2 ppb | |
| 2020-09-30 | 17.6 ppb | |
| 2020-09-30 | 16.0 ppb | |
| 2020-11-09 | 13.1 ppb | |
| 2020-11-09 | 7.30 ppb | |
| 2020-11-09 | 8.60 ppb | |
| 2020-11-09 | 13.0 ppb | |
| 2020-11-09 | 11.5 ppb | |
| 2020-11-10 | 12.7 ppb | |
| 2020-11-10 | 9.50 ppb | |
| 2020-11-10 | 14.5 ppb | |
| 2020-12-15 | 9.70 ppb | |
| 2020-12-15 | 8.70 ppb | |
| 2020-12-15 | 6.70 ppb | |
| 2020-12-15 | 7.40 ppb | |
| 2021-02-08 | 5.60 ppb | |
| 2021-02-08 | 3.70 ppb | |
| 2021-02-08 | 4.20 ppb | |
| 2021-02-08 | 5.80 ppb | |
| 2021-02-09 | 5.50 ppb | |
| 2021-02-09 | 4.40 ppb | |
| 2021-02-09 | 5.00 ppb | |
| 2021-02-09 | 4.80 ppb | |
| 2021-05-10 | 11.0 ppb | |
| 2021-05-10 | 6.80 ppb | |
| 2021-05-10 | 11.0 ppb | |
| 2021-05-10 | 11.2 ppb | |
| 2021-05-11 | 8.20 ppb | |
| 2021-05-11 | 6.50 ppb | |
| 2021-05-11 | 4.80 ppb | |
| 2021-05-11 | 6.70 ppb | |
| 2021-08-09 | 21.3 ppb | |
| 2021-08-09 | 23.4 ppb | |
| 2021-08-09 | 21.3 ppb | |
| 2021-08-09 | 15.4 ppb | |
| 2021-08-10 | 23.1 ppb | |
| 2021-08-10 | 19.4 ppb | |
| 2021-08-10 | 34.7 ppb | |
| 2021-08-10 | 19.9 ppb | |
| 2021-09-15 | 11.4 ppb | |
| 2021-09-22 | 11.4 ppb | |
| 2021-09-23 | 14.9 ppb | |
| 2021-09-28 | 9.10 ppb | |
| 2021-09-28 | 7.80 ppb | |
| 2021-09-28 | 9.70 ppb | |
| 2021-09-29 | 7.60 ppb | |
| 2021-11-08 | 14.1 ppb | |
| 2021-11-09 | 7.50 ppb | |
| 2021-11-09 | 7.80 ppb | |
| 2021-11-09 | 11.7 ppb | |
| 2021-11-09 | 8.80 ppb | |
| 2021-11-09 | 8.30 ppb | |
| 2021-11-10 | 10.1 ppb | |
| 2021-11-10 | 10.2 ppb | |
| 2021-12-10 | 9.40 ppb | |
| 2021-12-13 | 9.70 ppb | |
| 2021-12-14 | 5.80 ppb | |
| 2021-12-14 | 8.10 ppb | |
| 2021-12-14 | 8.10 ppb | |
| 2021-12-15 | 6.30 ppb | |
| 2021-12-15 | 9.40 ppb | |
| 2021-12-15 | 5.60 ppb | |
| 2021-12-15 | 6.30 ppb | |
| 2022-02-08 | 9.20 ppb | |
| 2022-02-08 | 4.40 ppb | |
| 2022-02-08 | 7.40 ppb | |
| 2022-02-08 | 5.20 ppb | |
| 2022-02-08 | 9.60 ppb | |
| 2022-02-08 | 8.20 ppb | |
| 2022-02-08 | 3.90 ppb | |
| 2022-02-08 | 4.30 ppb | |
| 2022-03-08 | 8.00 ppb | |
| 2022-03-08 | 6.90 ppb | |
| 2022-03-09 | 4.50 ppb | |
| 2022-03-09 | 4.50 ppb | |
| 2022-03-09 | 5.10 ppb | |
| 2022-03-10 | 8.30 ppb | |
| 2022-03-10 | 6.70 ppb | |
| 2022-03-10 | 5.00 ppb | |
| 2022-03-15 | 8.20 ppb | |
| 2022-04-05 | 5.30 ppb | |
| 2022-04-05 | 7.00 ppb | |
| 2022-04-05 | 5.50 ppb | |
| 2022-04-05 | 9.60 ppb | |
| 2022-04-05 | 8.50 ppb | |
| 2022-04-05 | 4.80 ppb | |
| 2022-04-05 | 6.00 ppb | |
| 2022-04-06 | 9.00 ppb | |
| 2022-05-06 | 5.50 ppb | |
| 2022-05-06 | 7.20 ppb | |
| 2022-05-06 | 6.80 ppb | |
| 2022-05-06 | 12.3 ppb | |
| 2022-05-06 | 11.4 ppb | |
| 2022-05-06 | 7.10 ppb | |
| 2022-05-06 | 7.00 ppb | |
| 2022-05-09 | 8.70 ppb | |
| 2022-08-08 | 22.2 ppb | |
| 2022-08-08 | 18.8 ppb | |
| 2022-08-08 | 16.1 ppb | |
| 2022-08-08 | 20.1 ppb | |
| 2022-08-09 | 26.4 ppb | |
| 2022-08-09 | 19.8 ppb | |
| 2022-08-09 | 22.4 ppb | |
| 2022-08-09 | 22.6 ppb | |
| 2022-09-29 | 21.7 ppb | |
| 2022-09-29 | 16.5 ppb | |
| 2022-09-29 | 14.5 ppb | |
| 2022-11-09 | 18.7 ppb | |
| 2022-11-09 | 13.1 ppb | |
| 2022-11-09 | 17.0 ppb | |
| 2022-11-09 | 14.2 ppb | |
| 2022-11-09 | 16.4 ppb | |
| 2022-11-09 | 15.3 ppb | |
| 2022-11-09 | 13.0 ppb | |
| 2022-11-09 | 14.6 ppb | |
| 2022-12-16 | 8.50 ppb | |
| 2022-12-16 | 6.80 ppb | |
| 2022-12-16 | 4.70 ppb | |
| 2022-12-16 | 5.20 ppb | |
| 2022-12-22 | 4.60 ppb | |
| 2022-12-22 | 7.20 ppb | |
| 2022-12-22 | 5.90 ppb | |
| 2022-12-22 | 10.3 ppb | |
| 2022-12-22 | 7.90 ppb | |
| 2022-12-22 | 4.10 ppb | |
| 2022-12-23 | 9.90 ppb | |
| 2022-12-23 | 4.90 ppb | |
| 2023-02-06 | 4.20 ppb | |
| 2023-02-06 | 4.50 ppb | |
| 2023-02-06 | 7.80 ppb | |
| 2023-02-06 | 4.80 ppb | |
| 2023-02-07 | 7.40 ppb | |
| 2023-02-07 | 6.10 ppb | |
| 2023-02-07 | 5.80 ppb | |
| 2023-02-07 | 3.70 ppb | |
| 2023-04-06 | 9.30 ppb | |
| 2023-04-06 | 4.80 ppb | |
| 2023-04-06 | 6.50 ppb | |
| 2023-04-06 | 5.30 ppb | |
| 2023-04-06 | 15.2 ppb | |
| 2023-04-06 | 12.8 ppb | |
| 2023-04-06 | 4.80 ppb | |
| 2023-04-06 | 5.90 ppb | |
| 2023-05-09 | 4.40 ppb | |
| 2023-05-09 | 6.20 ppb | |
| 2023-05-09 | 15.0 ppb | |
| 2023-05-09 | 5.30 ppb | |
| 2023-05-10 | 9.20 ppb | |
| 2023-05-10 | 5.80 ppb | |
| 2023-05-10 | 15.3 ppb | |
| 2023-05-10 | 5.20 ppb | |
| 2023-05-30 | 16.5 ppb | |
| 2023-05-30 | 15.0 ppb | |
| 2023-05-30 | 12.5 ppb | |
| 2023-05-30 | 11.5 ppb | |
| 2023-05-30 | 14.3 ppb | |
| 2023-08-08 | 15.6 ppb | |
| 2023-08-08 | 17.8 ppb | |
| 2023-08-08 | 15.6 ppb | |
| 2023-08-08 | 22.6 ppb | |
| 2023-08-08 | 19.6 ppb | |
| 2023-08-10 | 20.6 ppb | |
| 2023-08-10 | 18.2 ppb | |
| 2023-08-10 | 21.2 ppb | |
| 2023-09-22 | 19.9 ppb | |
| 2023-09-22 | 16.2 ppb | |
| 2023-09-22 | 15.6 ppb | |
| 2023-09-22 | 11.6 ppb | |
| 2023-09-22 | 12.0 ppb | |
| 2023-09-25 | 19.0 ppb | |
| 2023-09-25 | 11.7 ppb | |
| 2023-09-25 | 16.4 ppb | |
| 2023-09-25 | 13.0 ppb | |
| 2023-11-08 | 14.9 ppb | |
| 2023-11-08 | 8.90 ppb | |
| 2023-11-08 | 8.60 ppb | |
| 2023-11-08 | 13.9 ppb | |
| 2023-11-08 | 9.80 ppb | |
| 2023-11-09 | 7.90 ppb | |
| 2023-11-09 | 12.5 ppb | |
| 2023-11-09 | 11.6 ppb | |
| 2023-12-06 | 11.2 ppb | |
| 2023-12-06 | 6.00 ppb | |
| 2023-12-06 | 6.30 ppb | |
| 2023-12-06 | 10.3 ppb | |
| 2023-12-06 | 6.60 ppb | |
| 2023-12-07 | 8.80 ppb | |
| 2023-12-07 | 11.0 ppb | |
| 2023-12-07 | 5.40 ppb | |
| 2023-12-28 | 9.90 ppb |