Dibromochloromethane
Metropolitan Utilities District
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 | 4.70 ppb | 50 | 50 | 2.72 ppb - 7.64 ppb |
| 2019 | 4.75 ppb | 51 | 50 | ND - 9.61 ppb |
| 2020 | 6.15 ppb | 54 | 51 | ND - 9.24 ppb |
| 2021 | 4.78 ppb | 48 | 48 | 1.60 ppb - 8.20 ppb |
| 2022 | 5.12 ppb | 49 | 49 | 3.56 ppb - 8.10 ppb |
| 2023 | 5.95 ppb | 53 | 52 | ND - 12.6 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 |
|---|---|---|
| 2018-02-06 | 534097 | 6.13 ppb |
| 2018-02-06 | 534092 | 3.98 ppb |
| 2018-02-06 | 534095 | 6.81 ppb |
| 2018-02-06 | 534100 | 3.78 ppb |
| 2018-02-06 | 534094 | 3.92 ppb |
| 2018-02-06 | 534090 | 4.15 ppb |
| 2018-02-06 | 534099 | 7.57 ppb |
| 2018-02-06 | 534096 | 6.64 ppb |
| 2018-02-06 | 534089 | 7.64 ppb |
| 2018-02-06 | 534098 | 6.59 ppb |
| 2018-02-06 | 534091 | 3.81 ppb |
| 2018-02-06 | 534093 | 5.78 ppb |
| 2018-05-07 | 549815 | 4.71 ppb |
| 2018-05-07 | 549816 | 3.44 ppb |
| 2018-05-07 | 549817 | 5.93 ppb |
| 2018-05-07 | 549814 | 3.16 ppb |
| 2018-05-07 | 549819 | 5.96 ppb |
| 2018-05-07 | 549825 | 2.88 ppb |
| 2018-05-07 | 549823 | 3.65 ppb |
| 2018-05-07 | 549821 | 2.80 ppb |
| 2018-05-07 | 549820 | 2.82 ppb |
| 2018-05-07 | 549818 | 2.99 ppb |
| 2018-05-07 | 549824 | 2.91 ppb |
| 2018-05-07 | 549822 | 5.25 ppb |
| 2018-05-14 | 542540 | 3.58 ppb |
| 2018-05-14 | 542539 | 5.24 ppb |
| 2018-08-08 | 567027 | 4.74 ppb |
| 2018-08-08 | 567023 | 4.50 ppb |
| 2018-08-08 | 567022 | 4.88 ppb |
| 2018-08-08 | 567029 | 4.48 ppb |
| 2018-08-08 | 567030 | 4.57 ppb |
| 2018-08-08 | 567024 | 5.13 ppb |
| 2018-08-08 | 567021 | 5.45 ppb |
| 2018-08-08 | 567026 | 5.95 ppb |
| 2018-08-08 | 567020 | 4.41 ppb |
| 2018-08-08 | 567028 | 5.15 ppb |
| 2018-08-08 | 567019 | 5.23 ppb |
| 2018-08-08 | 567025 | 4.61 ppb |
| 2018-11-06 | 583375 | 3.36 ppb |
| 2018-11-06 | 583385 | 5.42 ppb |
| 2018-11-06 | 583379 | 2.85 ppb |
| 2018-11-06 | 583374 | 6.51 ppb |
| 2018-11-06 | 583383 | 3.59 ppb |
| 2018-11-06 | 583378 | 6.26 ppb |
| 2018-11-06 | 583376 | 6.13 ppb |
| 2018-11-06 | 583382 | 4.07 ppb |
| 2018-11-06 | 583380 | 5.83 ppb |
| 2018-11-06 | 583384 | 4.18 ppb |
| 2018-11-06 | 583381 | 2.86 ppb |
| 2018-11-06 | 583377 | 2.72 ppb |
| 2019-02-05 | 595239 | 7.13 ppb |
| 2019-02-05 | 595245 | 7.35 ppb |
| 2019-02-05 | 595238 | 5.10 ppb |
| 2019-02-05 | 595243 | 7.08 ppb |
| 2019-02-05 | 595240 | 4.84 ppb |
| 2019-02-05 | 595237 | 5.81 ppb |
| 2019-02-05 | 595236 | 5.54 ppb |
| 2019-02-05 | 595244 | 7.28 ppb |
| 2019-02-05 | 595241 | 7.43 ppb |
| 2019-02-05 | 595246 | 5.07 ppb |
| 2019-02-05 | 595242 | 5.48 ppb |
| 2019-02-05 | 595247 | 5.45 ppb |
| 2019-04-02 | 604245 | 5.23 ppb |
| 2019-04-22 | 604810 | 9.61 ppb |
| 2019-05-07 | 600564 | 4.13 ppb |
| 2019-05-07 | 600571 | 6.41 ppb |
| 2019-05-07 | 600574 | 3.15 ppb |
| 2019-05-07 | 600567 | 5.98 ppb |
| 2019-05-07 | 600570 | 3.08 ppb |
| 2019-05-07 | 600566 | 3.43 ppb |
| 2019-05-07 | 600573 | 3.20 ppb |
| 2019-05-07 | 600575 | 2.95 ppb |
| 2019-05-07 | 600565 | 4.34 ppb |
| 2019-05-07 | 600568 | 2.98 ppb |
| 2019-05-07 | 600572 | 3.34 ppb |
| 2019-05-07 | 600569 | 3.58 ppb |
| 2019-06-10 | 604811 | ND |
| 2019-08-06 | 622452 | 2.98 ppb |
| 2019-08-06 | 622449 | 5.82 ppb |
| 2019-08-06 | 622450 | 6.10 ppb |
| 2019-08-06 | 622455 | 2.73 ppb |
| 2019-08-06 | 622457 | 3.15 ppb |
| 2019-08-06 | 622459 | 3.11 ppb |
| 2019-08-06 | 622448 | 4.39 ppb |
| 2019-08-06 | 622458 | 3.38 ppb |
| 2019-08-06 | 622451 | 4.53 ppb |
| 2019-08-06 | 622454 | 2.93 ppb |
| 2019-08-06 | 622456 | 5.86 ppb |
| 2019-08-06 | 622453 | 2.76 ppb |
| 2019-11-05 | 644387 | 6.54 ppb |
| 2019-11-05 | 644379 | 3.78 ppb |
| 2019-11-05 | 644378 | 3.85 ppb |
| 2019-11-05 | 644385 | 3.83 ppb |
| 2019-11-05 | 644382 | 4.20 ppb |
| 2019-11-05 | 644381 | 7.30 ppb |
| 2019-11-05 | 644383 | 5.64 ppb |
| 2019-11-05 | 644386 | 5.20 ppb |
| 2019-11-05 | 644380 | 6.44 ppb |
| 2019-11-05 | 644388 | 4.27 ppb |
| 2019-11-05 | 644384 | 3.89 ppb |
| 2019-11-05 | 644389 | 4.79 ppb |
| 2020-02-04 | 656186 | 4.37 ppb |
| 2020-02-04 | 656189 | 6.72 ppb |
| 2020-02-04 | 656190 | 4.77 ppb |
| 2020-02-04 | 656184 | 6.21 ppb |
| 2020-02-04 | 656185 | 5.19 ppb |
| 2020-02-04 | 656187 | 4.74 ppb |
| 2020-02-04 | 656182 | 5.49 ppb |
| 2020-02-04 | 656183 | 9.24 ppb |
| 2020-02-04 | 656193 | 4.41 ppb |
| 2020-02-04 | 656188 | 7.17 ppb |
| 2020-02-04 | 656191 | 7.38 ppb |
| 2020-02-04 | 656192 | 7.82 ppb |
| 2020-04-20 | 667072 | 5.64 ppb |
| 2020-04-20 | 667071 | 5.79 ppb |
| 2020-05-05 | 672108 | 7.37 ppb |
| 2020-05-05 | 672109 | 6.75 ppb |
| 2020-05-05 | 672103 | 7.63 ppb |
| 2020-05-05 | 672106 | 5.67 ppb |
| 2020-05-05 | 672102 | 8.02 ppb |
| 2020-05-05 | 672098 | 5.85 ppb |
| 2020-05-05 | 672107 | 5.61 ppb |
| 2020-05-05 | 672101 | 7.25 ppb |
| 2020-05-05 | 672105 | 5.67 ppb |
| 2020-05-05 | 672099 | 5.20 ppb |
| 2020-05-05 | 672100 | 5.77 ppb |
| 2020-05-05 | 672104 | 5.65 ppb |
| 2020-06-01 | 667076 | ND |
| 2020-06-01 | 667075 | ND |
| 2020-06-01 | 667073 | 1.07 ppb |
| 2020-06-01 | 667074 | ND |
| 2020-08-04 | 681798 | 5.37 ppb |
| 2020-08-04 | 681805 | 7.35 ppb |
| 2020-08-04 | 681796 | 6.95 ppb |
| 2020-08-04 | 681804 | 6.97 ppb |
| 2020-08-04 | 681799 | 7.34 ppb |
| 2020-08-04 | 681795 | 5.84 ppb |
| 2020-08-04 | 681800 | 7.22 ppb |
| 2020-08-04 | 681802 | 6.92 ppb |
| 2020-08-04 | 681801 | 8.97 ppb |
| 2020-08-04 | 681803 | 6.20 ppb |
| 2020-08-04 | 681806 | 6.82 ppb |
| 2020-08-04 | 681797 | 6.53 ppb |
| 2020-11-10 | 706880 | 7.49 ppb |
| 2020-11-10 | 706882 | 6.47 ppb |
| 2020-11-10 | 706889 | 8.18 ppb |
| 2020-11-10 | 706879 | 8.21 ppb |
| 2020-11-10 | 706881 | 5.41 ppb |
| 2020-11-10 | 706883 | 6.17 ppb |
| 2020-11-10 | 706886 | 8.66 ppb |
| 2020-11-10 | 706888 | 8.40 ppb |
| 2020-11-10 | 706878 | 8.49 ppb |
| 2020-11-10 | 706885 | 5.10 ppb |
| 2020-11-10 | 706887 | 5.85 ppb |
| 2020-11-10 | 706884 | 8.67 ppb |
| 2021-02-02 | 719024 | 5.62 ppb |
| 2021-02-02 | 719020 | 2.90 ppb |
| 2021-02-02 | 719019 | 2.61 ppb |
| 2021-02-02 | 719023 | 6.10 ppb |
| 2021-02-02 | 719022 | 6.49 ppb |
| 2021-02-02 | 719025 | 6.14 ppb |
| 2021-02-02 | 719026 | 3.04 ppb |
| 2021-02-02 | 719018 | 2.64 ppb |
| 2021-02-02 | 719017 | 6.22 ppb |
| 2021-02-02 | 719016 | 7.24 ppb |
| 2021-02-02 | 719015 | 2.81 ppb |
| 2021-02-02 | 719021 | 6.41 ppb |
| 2021-05-04 | 733031 | 5.52 ppb |
| 2021-05-04 | 733032 | 2.56 ppb |
| 2021-05-04 | 733028 | 2.69 ppb |
| 2021-05-04 | 733034 | 2.08 ppb |
| 2021-05-04 | 733033 | 2.86 ppb |
| 2021-05-04 | 733026 | 2.11 ppb |
| 2021-05-04 | 733029 | 4.73 ppb |
| 2021-05-04 | 733030 | 5.04 ppb |
| 2021-05-04 | 733027 | 4.92 ppb |
| 2021-05-04 | 733035 | 1.91 ppb |
| 2021-05-04 | 733036 | 1.62 ppb |
| 2021-05-04 | 733037 | 1.60 ppb |
| 2021-08-04 | 753576 | 4.82 ppb |
| 2021-08-04 | 753575 | 4.44 ppb |
| 2021-08-04 | 753580 | 4.28 ppb |
| 2021-08-04 | 753577 | 4.35 ppb |
| 2021-08-04 | 753570 | 4.14 ppb |
| 2021-08-04 | 753571 | 4.40 ppb |
| 2021-08-04 | 753581 | 4.05 ppb |
| 2021-08-04 | 753572 | 8.13 ppb |
| 2021-08-04 | 753578 | 5.58 ppb |
| 2021-08-04 | 753579 | 4.08 ppb |
| 2021-08-04 | 753574 | 4.30 ppb |
| 2021-08-04 | 753573 | 8.20 ppb |
| 2021-11-03 | 770901 | 6.92 ppb |
| 2021-11-03 | 770897 | 6.98 ppb |
| 2021-11-03 | 770898 | 6.85 ppb |
| 2021-11-03 | 770900 | 6.54 ppb |
| 2021-11-03 | 770890 | 5.00 ppb |
| 2021-11-03 | 770892 | 5.54 ppb |
| 2021-11-03 | 770899 | 6.69 ppb |
| 2021-11-03 | 770891 | 5.42 ppb |
| 2021-11-03 | 770894 | 5.26 ppb |
| 2021-11-03 | 770896 | 6.66 ppb |
| 2021-11-03 | 770893 | 5.50 ppb |
| 2021-11-03 | 770895 | 5.30 ppb |
| 2022-02-23 | 782425 | 4.86 ppb |
| 2022-02-23 | 782422 | 5.31 ppb |
| 2022-02-23 | 782428 | 6.23 ppb |
| 2022-02-23 | 782429 | 6.43 ppb |
| 2022-02-23 | 782420 | 5.20 ppb |
| 2022-02-23 | 782427 | 6.54 ppb |
| 2022-02-23 | 782421 | 4.09 ppb |
| 2022-02-23 | 782419 | 4.46 ppb |
| 2022-02-23 | 782423 | 5.08 ppb |
| 2022-02-23 | 782426 | 6.80 ppb |
| 2022-02-23 | 782418 | 5.25 ppb |
| 2022-02-23 | 782424 | 6.16 ppb |
| 2022-04-26 | 793153 | 6.21 ppb |
| 2022-05-03 | 800306 | 6.29 ppb |
| 2022-05-03 | 800313 | 6.51 ppb |
| 2022-05-03 | 800314 | 4.30 ppb |
| 2022-05-03 | 800312 | 6.59 ppb |
| 2022-05-03 | 800305 | 4.23 ppb |
| 2022-05-03 | 800307 | 6.20 ppb |
| 2022-05-03 | 800308 | 4.38 ppb |
| 2022-05-03 | 800309 | 5.45 ppb |
| 2022-05-03 | 800303 | 4.49 ppb |
| 2022-05-03 | 800311 | 4.35 ppb |
| 2022-05-03 | 800304 | 4.68 ppb |
| 2022-05-03 | 800310 | 5.34 ppb |
| 2022-08-03 | 815800 | 3.75 ppb |
| 2022-08-03 | 815794 | 4.26 ppb |
| 2022-08-03 | 815795 | 8.00 ppb |
| 2022-08-03 | 815797 | 3.76 ppb |
| 2022-08-03 | 815803 | 3.60 ppb |
| 2022-08-03 | 815804 | 3.83 ppb |
| 2022-08-03 | 815802 | 3.76 ppb |
| 2022-08-03 | 815801 | 3.72 ppb |
| 2022-08-03 | 815799 | 3.56 ppb |
| 2022-08-03 | 815796 | 6.41 ppb |
| 2022-08-03 | 815793 | 4.15 ppb |
| 2022-08-03 | 815798 | 3.89 ppb |
| 2022-11-08 | 833764 | 8.00 ppb |
| 2022-11-08 | 833766 | 4.28 ppb |
| 2022-11-08 | 833762 | 3.81 ppb |
| 2022-11-08 | 833755 | 4.74 ppb |
| 2022-11-08 | 833757 | 5.39 ppb |
| 2022-11-08 | 833758 | 5.33 ppb |
| 2022-11-08 | 833759 | 5.09 ppb |
| 2022-11-08 | 833760 | 3.87 ppb |
| 2022-11-08 | 833763 | 5.27 ppb |
| 2022-11-08 | 833765 | 8.10 ppb |
| 2022-11-08 | 833761 | 3.76 ppb |
| 2022-11-08 | 833756 | 5.36 ppb |
| 2023-01-17 | 844825 | ND |
| 2023-02-07 | 847425 | 5.85 ppb |
| 2023-02-07 | 847423 | 5.82 ppb |
| 2023-02-07 | 847424 | 5.51 ppb |
| 2023-02-07 | 847415 | 5.90 ppb |
| 2023-02-07 | 847421 | 5.59 ppb |
| 2023-02-07 | 847420 | 5.45 ppb |
| 2023-02-07 | 847418 | 5.50 ppb |
| 2023-02-07 | 847422 | 5.13 ppb |
| 2023-02-07 | 847414 | 5.51 ppb |
| 2023-02-07 | 847419 | 5.66 ppb |
| 2023-02-07 | 847416 | 5.34 ppb |
| 2023-02-07 | 847417 | 5.61 ppb |
| 2023-05-02 | 858550 | 5.30 ppb |
| 2023-05-02 | 858543 | 4.26 ppb |
| 2023-05-02 | 858549 | 5.71 ppb |
| 2023-05-02 | 858548 | 5.58 ppb |
| 2023-05-02 | 858542 | 5.42 ppb |
| 2023-05-02 | 858540 | 3.91 ppb |
| 2023-05-02 | 858539 | 5.33 ppb |
| 2023-05-02 | 858547 | 5.61 ppb |
| 2023-05-02 | 858545 | 4.09 ppb |
| 2023-05-02 | 858541 | 4.14 ppb |
| 2023-05-02 | 858546 | 5.42 ppb |
| 2023-05-02 | 858544 | 3.69 ppb |
| 2023-06-08 | 855997 | 2.14 ppb |
| 2023-06-08 | 855996 | 3.60 ppb |
| 2023-06-12 | 856264 | 6.23 ppb |
| 2023-06-12 | 856263 | 3.67 ppb |
| 2023-08-08 | 879877 | 7.07 ppb |
| 2023-08-08 | 879874 | 6.58 ppb |
| 2023-08-08 | 879878 | 11.8 ppb |
| 2023-08-08 | 879879 | 12.1 ppb |
| 2023-08-08 | 879880 | 7.44 ppb |
| 2023-08-08 | 879885 | 6.19 ppb |
| 2023-08-08 | 879876 | 6.63 ppb |
| 2023-08-08 | 879882 | 7.37 ppb |
| 2023-08-08 | 879875 | 7.36 ppb |
| 2023-08-08 | 879884 | 6.58 ppb |
| 2023-08-08 | 879883 | 12.6 ppb |
| 2023-08-08 | 879881 | 12.2 ppb |
| 2023-11-07 | 891421 | 7.46 ppb |
| 2023-11-07 | 891419 | 7.73 ppb |
| 2023-11-07 | 891420 | 6.43 ppb |
| 2023-11-07 | 891417 | 4.97 ppb |
| 2023-11-07 | 891424 | 5.37 ppb |
| 2023-11-07 | 891425 | 5.93 ppb |
| 2023-11-07 | 891423 | 4.45 ppb |
| 2023-11-07 | 891418 | 7.73 ppb |
| 2023-11-07 | 891427 | 5.61 ppb |
| 2023-11-07 | 891422 | 5.05 ppb |
| 2023-11-07 | 891428 | 4.67 ppb |
| 2023-11-07 | 891426 | 4.84 ppb |