Dibromochloromethane
City of Tacoma
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 | ND | 56 | 0 | ND |
| 2019 | 0.0435 ppb | 51 | 4 | ND - 0.600 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.299 ppb | 59 | 23 | ND - 2.30 ppb |
| 2022 | 0.0323 ppb | 56 | 4 | ND - 0.560 ppb |
| 2023 | 0.125 ppb | 69 | 9 | ND - 1.59 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 |
|---|---|---|
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-02 | ND | |
| 2018-01-03 | ND | |
| 2018-01-03 | ND | |
| 2018-01-03 | ND | |
| 2018-01-03 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-02 | ND | |
| 2018-04-03 | ND | |
| 2018-04-03 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-02 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-07-03 | ND | |
| 2018-10-30 | ND | |
| 2018-10-30 | ND | |
| 2018-10-30 | ND | |
| 2018-10-30 | ND | |
| 2018-10-30 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2018-10-31 | ND | |
| 2019-01-02 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-14 | ND | |
| 2019-01-15 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-01 | ND | |
| 2019-04-03 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-08 | ND | |
| 2019-07-24 | ND | |
| 2019-10-01 | 0.560 ppb | |
| 2019-10-01 | 0.560 ppb | |
| 2019-10-01 | 0.600 ppb | |
| 2019-10-01 | ND | |
| 2019-10-02 | ND | |
| 2019-10-02 | ND | |
| 2019-10-02 | ND | |
| 2019-10-02 | ND | |
| 2019-10-02 | ND | |
| 2019-10-02 | 0.500 ppb | |
| 2019-10-02 | ND | |
| 2019-10-02 | ND | |
| 2019-12-03 | ND | |
| 2021-01-04 | 4061223 | ND |
| 2021-01-04 | 4061225 | ND |
| 2021-01-04 | 4061230 | ND |
| 2021-01-04 | 4061232 | ND |
| 2021-01-04 | 4061227 | ND |
| 2021-01-04 | 4061229 | 0.500 ppb |
| 2021-01-04 | 4061231 | ND |
| 2021-01-04 | 4061228 | ND |
| 2021-01-04 | 4061226 | 0.540 ppb |
| 2021-01-04 | 4061224 | ND |
| 2021-01-04 | 4061222 | ND |
| 2021-01-05 | 4061233 | ND |
| 2021-04-05 | 4099381 | ND |
| 2021-04-05 | 4099383 | ND |
| 2021-04-05 | 4099388 | ND |
| 2021-04-05 | 4099384 | ND |
| 2021-04-05 | 4099382 | ND |
| 2021-04-05 | 4099377 | ND |
| 2021-04-05 | 4099378 | ND |
| 2021-04-05 | 4099387 | ND |
| 2021-04-05 | 4099385 | ND |
| 2021-04-05 | 4099386 | ND |
| 2021-04-05 | 4099379 | ND |
| 2021-04-06 | 4099380 | ND |
| 2021-06-21 | 4137307 | ND |
| 2021-06-21 | 4137309 | ND |
| 2021-06-21 | 4137308 | ND |
| 2021-06-21 | 4233773 | ND |
| 2021-06-30 | 4142811 | ND |
| 2021-07-06 | 4145160 | 0.870 ppb |
| 2021-07-06 | 4145159 | 0.960 ppb |
| 2021-07-06 | 4145162 | ND |
| 2021-07-06 | 4145163 | 0.900 ppb |
| 2021-07-06 | 4145165 | 2.30 ppb |
| 2021-07-06 | 4145166 | 0.560 ppb |
| 2021-07-06 | 4145158 | 1.19 ppb |
| 2021-07-06 | 4145168 | 0.980 ppb |
| 2021-07-06 | 4145164 | 0.840 ppb |
| 2021-07-07 | 4145176 | ND |
| 2021-07-07 | 4145172 | ND |
| 2021-07-07 | 4145161 | ND |
| 2021-07-07 | 4145170 | ND |
| 2021-07-07 | 4145173 | ND |
| 2021-07-07 | 4145175 | ND |
| 2021-10-04 | 4198437 | 0.590 ppb |
| 2021-10-04 | 4198452 | 0.680 ppb |
| 2021-10-04 | 4198442 | 0.620 ppb |
| 2021-10-04 | 4198456 | 0.660 ppb |
| 2021-10-04 | 4198460 | 0.550 ppb |
| 2021-10-04 | 4198463 | 0.610 ppb |
| 2021-10-04 | 4198436 | 0.620 ppb |
| 2021-10-04 | 4198455 | 0.660 ppb |
| 2021-10-04 | 4198466 | 0.580 ppb |
| 2021-10-04 | 4198457 | 0.720 ppb |
| 2021-10-05 | 4198469 | 0.570 ppb |
| 2021-10-05 | 4198475 | ND |
| 2021-10-05 | 4198478 | 0.540 ppb |
| 2021-10-05 | 4198472 | ND |
| 2021-10-05 | 4198447 | 0.630 ppb |
| 2022-01-03 | 4227794 | ND |
| 2022-01-03 | 4227797 | ND |
| 2022-01-03 | 4227804 | ND |
| 2022-01-03 | 4227790 | ND |
| 2022-01-03 | 4227808 | ND |
| 2022-01-03 | 4227812 | ND |
| 2022-01-03 | 4227788 | ND |
| 2022-01-03 | 4227806 | ND |
| 2022-01-03 | 4227787 | ND |
| 2022-01-03 | 4227799 | ND |
| 2022-01-04 | 4227815 | ND |
| 2022-01-04 | 4227791 | ND |
| 2022-04-04 | 4271542 | ND |
| 2022-04-04 | 4271565 | ND |
| 2022-04-04 | 4271549 | ND |
| 2022-04-04 | 4271552 | ND |
| 2022-04-04 | 4271554 | ND |
| 2022-04-04 | 4271546 | ND |
| 2022-04-04 | 4271564 | ND |
| 2022-04-04 | 4271541 | ND |
| 2022-04-04 | 4271543 | ND |
| 2022-04-04 | 4271568 | ND |
| 2022-04-04 | 4271557 | ND |
| 2022-04-04 | 4271561 | ND |
| 2022-07-05 | 4322155 | ND |
| 2022-07-05 | 4322157 | ND |
| 2022-07-05 | 4322158 | ND |
| 2022-07-05 | 4322150 | ND |
| 2022-07-05 | 4322156 | ND |
| 2022-07-05 | 4322159 | ND |
| 2022-07-05 | 4322151 | ND |
| 2022-07-05 | 4322152 | ND |
| 2022-07-06 | 4322160 | ND |
| 2022-07-06 | 4322175 | ND |
| 2022-07-06 | 4322153 | ND |
| 2022-07-06 | 4322154 | ND |
| 2022-07-06 | 4322161 | ND |
| 2022-07-06 | 4322176 | ND |
| 2022-07-06 | 4322174 | ND |
| 2022-09-15 | 4368469 | ND |
| 2022-09-23 | 4368470 | ND |
| 2022-10-03 | 4370614 | ND |
| 2022-10-03 | 4370621 | ND |
| 2022-10-03 | 4370612 | 0.500 ppb |
| 2022-10-03 | 4370613 | ND |
| 2022-10-03 | 4370620 | ND |
| 2022-10-03 | 4370622 | ND |
| 2022-10-03 | 4370618 | ND |
| 2022-10-03 | 4370617 | ND |
| 2022-10-03 | 4370619 | 0.560 ppb |
| 2022-10-03 | 4370616 | ND |
| 2022-10-04 | 4370623 | 0.510 ppb |
| 2022-10-04 | 4370615 | ND |
| 2022-10-11 | 4363364 | 0.240 ppb |
| 2022-11-15 | 4428454 | ND |
| 2022-11-16 | 4388597 | ND |
| 2023-01-03 | 4399210 | 1.59 ppb |
| 2023-01-03 | 4399215 | ND |
| 2023-01-03 | 4399208 | ND |
| 2023-01-03 | 4399217 | ND |
| 2023-01-03 | 4415318 | 0.610 ppb |
| 2023-01-03 | 4399211 | ND |
| 2023-01-03 | 4399212 | 1.18 ppb |
| 2023-01-03 | 4415334 | ND |
| 2023-01-03 | 4415333 | 1.18 ppb |
| 2023-01-03 | 4415320 | ND |
| 2023-01-03 | 4415323 | ND |
| 2023-01-03 | 4399216 | ND |
| 2023-01-03 | 4399209 | 0.610 ppb |
| 2023-01-03 | 4415329 | ND |
| 2023-01-03 | 4415335 | 1.59 ppb |
| 2023-01-03 | 4399213 | ND |
| 2023-01-03 | 4399214 | ND |
| 2023-01-03 | 4415319 | ND |
| 2023-01-03 | 4415326 | ND |
| 2023-01-03 | 4415328 | ND |
| 2023-01-04 | 4399206 | ND |
| 2023-01-04 | 4399204 | ND |
| 2023-01-04 | 4399205 | ND |
| 2023-01-04 | 4399203 | ND |
| 2023-01-04 | 4399207 | ND |
| 2023-01-04 | 4415336 | ND |
| 2023-01-04 | 4415337 | ND |
| 2023-04-05 | 4444241 | ND |
| 2023-04-05 | 4444248 | ND |
| 2023-04-05 | 4444239 | ND |
| 2023-04-05 | 4444243 | ND |
| 2023-04-05 | 4444245 | ND |
| 2023-04-05 | 4444249 | ND |
| 2023-04-05 | 4444247 | ND |
| 2023-04-05 | 4444246 | ND |
| 2023-04-05 | 4444244 | ND |
| 2023-04-05 | 4444242 | ND |
| 2023-04-05 | 4444240 | ND |
| 2023-04-06 | 4444128 | ND |
| 2023-04-06 | 4444144 | ND |
| 2023-04-06 | 4444140 | ND |
| 2023-04-06 | 4444134 | ND |
| 2023-06-20 | 4542958 | ND |
| 2023-07-10 | 4505977 | ND |
| 2023-07-10 | 4505966 | ND |
| 2023-07-10 | 4505983 | ND |
| 2023-07-10 | 4505940 | ND |
| 2023-07-10 | 4505963 | ND |
| 2023-07-10 | 4505956 | ND |
| 2023-07-10 | 4505980 | ND |
| 2023-07-10 | 4505970 | ND |
| 2023-07-10 | 4505942 | ND |
| 2023-07-10 | 4505937 | ND |
| 2023-07-10 | 4505973 | ND |
| 2023-07-11 | 4505960 | ND |
| 2023-07-12 | 4542960 | ND |
| 2023-07-12 | 4542959 | ND |
| 2023-10-02 | 4556399 | ND |
| 2023-10-02 | 4556390 | ND |
| 2023-10-02 | 4556400 | ND |
| 2023-10-02 | 4556393 | ND |
| 2023-10-02 | 4556389 | 0.590 ppb |
| 2023-10-02 | 4556396 | 0.750 ppb |
| 2023-10-02 | 4556398 | ND |
| 2023-10-02 | 4556397 | 0.540 ppb |
| 2023-10-02 | 4556394 | ND |
| 2023-10-02 | 4556391 | ND |
| 2023-10-02 | 4556392 | ND |
| 2023-10-02 | 4556395 | ND |