Dibromochloromethane
Metropolitan District Commission
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 | 0.0622 ppb | 51 | 5 | ND - 0.752 ppb |
| 2019 | 0.0506 ppb | 51 | 4 | ND - 0.702 ppb |
| 2020 | 0.108 ppb | 51 | 9 | ND - 0.839 ppb |
| 2021 | 0.0376 ppb | 51 | 3 | ND - 0.660 ppb |
| 2022 | 0.0651 ppb | 51 | 5 | ND - 0.766 ppb |
| 2023 | 0.0515 ppb | 51 | 4 | ND - 0.693 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 |
|---|---|---|
| 2018-03-05 | AD89780GE | ND |
| 2018-03-05 | AD89784GE | ND |
| 2018-03-06 | AD89785GE | ND |
| 2018-03-06 | AD89779GE | ND |
| 2018-03-06 | AD89781GE | ND |
| 2018-03-06 | AD89782GE | ND |
| 2018-03-06 | AD89783GE | ND |
| 2018-03-06 | AD89776GE | ND |
| 2018-03-06 | AD89777GE | ND |
| 2018-03-08 | AD89786GE | ND |
| 2018-03-08 | AD89787GE | 0.600 ppb |
| 2018-03-09 | AD89778GE | ND |
| 2018-06-11 | AD98391GE | ND |
| 2018-06-11 | AD98395GE | ND |
| 2018-06-12 | AD98396GE | ND |
| 2018-06-12 | AD98390GE | ND |
| 2018-06-12 | AD98394GE | ND |
| 2018-06-13 | AD98392GE | ND |
| 2018-06-13 | AD98393GE | ND |
| 2018-06-13 | AD98387GE | ND |
| 2018-06-13 | AD98388GE | ND |
| 2018-06-14 | AD98397GE | ND |
| 2018-06-14 | AD98398GE | 0.695 ppb |
| 2018-06-15 | AD98389GE | ND |
| 2018-07-16 | AE00911GE | ND |
| 2018-07-16 | AE00927GE | ND |
| 2018-07-16 | AE00912GE | ND |
| 2018-09-05 | AE06391GE | ND |
| 2018-09-05 | AE06392GE | ND |
| 2018-09-05 | AE06396GE | ND |
| 2018-09-05 | AE06397GE | ND |
| 2018-09-06 | AE06399GE | 0.506 ppb |
| 2018-09-06 | AE06400GE | ND |
| 2018-09-06 | AE06401GE | ND |
| 2018-09-06 | AE06402GE | 0.752 ppb |
| 2018-09-06 | AE06394GE | ND |
| 2018-09-07 | AE06395GE | ND |
| 2018-09-07 | AE06393GE | ND |
| 2018-09-07 | AE06398GE | ND |
| 2018-12-03 | AE14329GE | ND |
| 2018-12-03 | AE14330GE | ND |
| 2018-12-03 | AE14334GE | ND |
| 2018-12-04 | AE14335GE | ND |
| 2018-12-04 | AE14333GE | ND |
| 2018-12-05 | AE14326GE | ND |
| 2018-12-05 | AE14327GE | ND |
| 2018-12-05 | AE14331GE | ND |
| 2018-12-05 | AE14332GE | ND |
| 2018-12-06 | AE14336GE | ND |
| 2018-12-06 | AE14337GE | 0.617 ppb |
| 2018-12-07 | AE14328GE | ND |
| 2019-03-11 | AE22324GE | ND |
| 2019-03-11 | AE22328GE | ND |
| 2019-03-12 | AE22329GE | ND |
| 2019-03-12 | AE22327GE | ND |
| 2019-03-12 | AE22323GE | ND |
| 2019-03-13 | AE22325GE | ND |
| 2019-03-13 | AE22326GE | ND |
| 2019-03-13 | AE22320GE | ND |
| 2019-03-13 | AE22321GE | ND |
| 2019-03-14 | AE22330GE | ND |
| 2019-03-14 | AE22331GE | ND |
| 2019-03-15 | AE22322GE | ND |
| 2019-06-03 | AE30192GE | ND |
| 2019-06-03 | AE30196GE | ND |
| 2019-06-04 | AE30197GE | ND |
| 2019-06-04 | AE30191GE | ND |
| 2019-06-04 | AE30195GE | ND |
| 2019-06-05 | AE30193GE | ND |
| 2019-06-05 | AE30194GE | ND |
| 2019-06-05 | AE30188GE | ND |
| 2019-06-05 | AE30189GE | ND |
| 2019-06-05 | AE29314GE | ND |
| 2019-06-05 | AE29313GE | ND |
| 2019-06-05 | AE29315GE | ND |
| 2019-06-06 | AE30198GE | ND |
| 2019-06-06 | AE30199GE | 0.621 ppb |
| 2019-06-07 | AE30190GE | ND |
| 2019-09-09 | AE38259GE | 0.563 ppb |
| 2019-09-09 | AE38255GE | ND |
| 2019-09-10 | AE38258GE | ND |
| 2019-09-10 | AE38260GE | ND |
| 2019-09-10 | AE38254GE | ND |
| 2019-09-11 | AE38251GE | ND |
| 2019-09-11 | AE38252GE | ND |
| 2019-09-11 | AE38256GE | ND |
| 2019-09-11 | AE38257GE | ND |
| 2019-09-12 | AE38261GE | ND |
| 2019-09-12 | AE38262GE | 0.697 ppb |
| 2019-09-13 | AE38253GE | ND |
| 2019-12-02 | AE45714GE | ND |
| 2019-12-02 | AE45710GE | ND |
| 2019-12-03 | AE45713GE | ND |
| 2019-12-03 | AE45715GE | ND |
| 2019-12-03 | AE45709GE | ND |
| 2019-12-04 | AE45706GE | ND |
| 2019-12-04 | AE45707GE | ND |
| 2019-12-04 | AE45711GE | ND |
| 2019-12-04 | AE45712GE | ND |
| 2019-12-05 | AE45716GE | ND |
| 2019-12-05 | AE45717GE | 0.702 ppb |
| 2019-12-06 | AE45708GE | ND |
| 2020-03-02 | AE52330GE | ND |
| 2020-03-02 | AE52331GE | ND |
| 2020-03-02 | AE52332GE | ND |
| 2020-03-02 | AE52333GE | ND |
| 2020-03-02 | AE52334GE | ND |
| 2020-03-02 | AE52335GE | ND |
| 2020-03-02 | AE52336GE | ND |
| 2020-03-03 | AE53110GE | ND |
| 2020-03-03 | AE53111GE | ND |
| 2020-03-03 | AE53112GE | ND |
| 2020-03-03 | AE53113GE | ND |
| 2020-03-03 | AE53114GE | ND |
| 2020-06-01 | AE60029GE | ND |
| 2020-06-01 | AE60030GE | ND |
| 2020-06-01 | AE60033GE | ND |
| 2020-06-01 | AE60034GE | ND |
| 2020-06-01 | AE60035GE | ND |
| 2020-06-01 | AE60037GE | ND |
| 2020-06-01 | AE60038GE | ND |
| 2020-06-02 | AE60039GE | ND |
| 2020-06-02 | AE60040GE | 0.583 ppb |
| 2020-06-02 | AE60036GE | ND |
| 2020-06-02 | AE60031GE | ND |
| 2020-06-02 | AE60032GE | ND |
| 2020-06-02 | AE59301GE | ND |
| 2020-06-02 | AE59305GE | ND |
| 2020-06-02 | AE59302GE | ND |
| 2020-09-08 | AE67035GE | ND |
| 2020-09-08 | AE67036GE | 0.575 ppb |
| 2020-09-08 | AE67037GE | ND |
| 2020-09-08 | AE67038GE | ND |
| 2020-09-08 | AE67031GE | 0.615 ppb |
| 2020-09-08 | AE67032GE | 0.525 ppb |
| 2020-09-09 | AE67033GE | ND |
| 2020-09-09 | AE67034GE | ND |
| 2020-09-09 | AE67028GE | ND |
| 2020-09-09 | AE67029GE | ND |
| 2020-09-10 | AE67030GE | ND |
| 2020-09-10 | AE67039GE | 0.765 ppb |
| 2020-12-01 | AE73075GE | ND |
| 2020-12-01 | AE73076GE | ND |
| 2020-12-01 | AE73077GE | 0.517 ppb |
| 2020-12-01 | AE73078GE | 0.839 ppb |
| 2020-12-01 | AE73081GE | ND |
| 2020-12-01 | AE73082GE | ND |
| 2020-12-01 | AE73083GE | 0.546 ppb |
| 2020-12-01 | AE73084GE | ND |
| 2020-12-01 | AE73085GE | 0.527 ppb |
| 2020-12-01 | AE73086GE | ND |
| 2020-12-01 | AE73087GE | ND |
| 2020-12-01 | AE73088GE | ND |
| 2021-03-01 | AE79601GE | ND |
| 2021-03-01 | AE79604GE | ND |
| 2021-03-02 | AE79687GE | ND |
| 2021-03-02 | AE79692GE | ND |
| 2021-03-02 | AE79694GE | ND |
| 2021-03-03 | AE79775GE | ND |
| 2021-03-03 | AE79776GE | ND |
| 2021-03-03 | AE79779GE | ND |
| 2021-03-03 | AE79780GE | ND |
| 2021-03-03 | AE79821GE | ND |
| 2021-03-03 | AE79822GE | ND |
| 2021-03-04 | AE79871GE | ND |
| 2021-06-01 | AE86386GE | ND |
| 2021-06-01 | AE86387GE | ND |
| 2021-06-01 | AE86388GE | ND |
| 2021-06-01 | AE86389GE | ND |
| 2021-06-01 | AE86390GE | ND |
| 2021-06-01 | AE86392GE | ND |
| 2021-06-01 | AE86393GE | ND |
| 2021-06-02 | AE86482GE | ND |
| 2021-06-02 | AE86484GE | ND |
| 2021-06-02 | AE86485GE | ND |
| 2021-06-02 | AE86487GE | ND |
| 2021-06-02 | AE86489GE | 0.660 ppb |
| 2021-09-07 | AE94495GE | ND |
| 2021-09-07 | AE94496GE | ND |
| 2021-09-07 | AE94499GE | ND |
| 2021-09-07 | AE94500GE | ND |
| 2021-09-07 | AE94501GE | ND |
| 2021-09-07 | AE94502GE | ND |
| 2021-09-08 | AE94503GE | 0.604 ppb |
| 2021-09-08 | AE94497GE | ND |
| 2021-09-08 | AE94498GE | ND |
| 2021-09-08 | AE94492GE | ND |
| 2021-09-08 | AE94493GE | ND |
| 2021-09-08 | AE94494GE | ND |
| 2021-11-23 | V300107450 300107457 | ND |
| 2021-11-23 | V300107451 300107463 | ND |
| 2021-11-29 | V300109635 300109637 | ND |
| 2021-12-07 | AF01258GE | ND |
| 2021-12-07 | AF01259GE | ND |
| 2021-12-07 | AF01262GE | ND |
| 2021-12-07 | AF01264GE | ND |
| 2021-12-08 | AF01255GE | ND |
| 2021-12-08 | AF01260GE | ND |
| 2021-12-08 | AF01261GE | ND |
| 2021-12-09 | AF01265GE | ND |
| 2021-12-09 | AF01266GE | 0.656 ppb |
| 2021-12-09 | AF01263GE | ND |
| 2021-12-10 | AF01256GE | ND |
| 2021-12-10 | AF01257GE | ND |
| 2022-03-07 | AF07839GE | ND |
| 2022-03-07 | AF07835GE | ND |
| 2022-03-08 | AF07838GE | ND |
| 2022-03-08 | AF07840GE | ND |
| 2022-03-08 | AF07834GE | ND |
| 2022-03-09 | AF07831GE | ND |
| 2022-03-09 | AF07836GE | ND |
| 2022-03-09 | AF07837GE | ND |
| 2022-03-10 | AF07841GE | ND |
| 2022-03-10 | AF07842GE | ND |
| 2022-03-11 | AF07832GE | ND |
| 2022-03-11 | AF07833GE | ND |
| 2022-06-06 | AF13657GE | ND |
| 2022-06-06 | AF13658GE | ND |
| 2022-06-06 | AF13659GE | ND |
| 2022-06-06 | AF13660GE | ND |
| 2022-06-06 | AF13661GE | ND |
| 2022-06-06 | AF13662GE | ND |
| 2022-06-06 | AF13663GE | ND |
| 2022-06-06 | AF13664GE | ND |
| 2022-06-06 | AF13665GE | ND |
| 2022-06-06 | AF13666GE | ND |
| 2022-06-06 | AF13667GE | ND |
| 2022-06-06 | AF13668GE | 0.637 ppb |
| 2022-09-06 | AF20645GE | 0.720 ppb |
| 2022-09-06 | AF20646GE | ND |
| 2022-09-06 | AF20649GE | ND |
| 2022-09-06 | AF20650GE | ND |
| 2022-09-06 | AF20651GE | ND |
| 2022-09-06 | AF20652GE | ND |
| 2022-09-07 | AF20642GE | ND |
| 2022-09-07 | AF20643GE | ND |
| 2022-09-07 | AF20647GE | ND |
| 2022-09-07 | AF20648GE | ND |
| 2022-09-08 | AF20644GE | ND |
| 2022-09-08 | AF20653GE | 0.624 ppb |
| 2022-12-05 | AF27777GE | ND |
| 2022-12-05 | AF27781GE | ND |
| 2022-12-06 | AF27782GE | ND |
| 2022-12-06 | AF27780GE | ND |
| 2022-12-06 | AF27776GE | ND |
| 2022-12-07 | AF27778GE | ND |
| 2022-12-07 | AF27779GE | ND |
| 2022-12-07 | AF27773GE | 0.572 ppb |
| 2022-12-08 | AF27783GE | ND |
| 2022-12-08 | AF27784GE | 0.766 ppb |
| 2022-12-09 | AF27774GE | ND |
| 2022-12-09 | AF27775GE | ND |
| 2022-12-15 | V300287053 300287060 | ND |
| 2022-12-15 | V300287072 300287079 | ND |
| 2022-12-15 | V300287100 300287107 | ND |
| 2023-03-06 | AF33278GE | ND |
| 2023-03-06 | AF33279GE | ND |
| 2023-03-06 | AF33280GE | ND |
| 2023-03-06 | AF33281GE | ND |
| 2023-03-06 | AF33282GE | 0.639 ppb |
| 2023-03-06 | AF33283GE | ND |
| 2023-03-07 | AF33357GE | ND |
| 2023-03-07 | AF33358GE | ND |
| 2023-03-07 | AF33360GE | ND |
| 2023-03-07 | AF33361GE | ND |
| 2023-03-07 | AF33362GE | ND |
| 2023-03-07 | AF33363GE | ND |
| 2023-06-05 | AF39761GE | ND |
| 2023-06-05 | AF39762GE | ND |
| 2023-06-05 | AF39763GE | ND |
| 2023-06-05 | AF39764GE | ND |
| 2023-06-06 | AF39874GE | ND |
| 2023-06-06 | AF39875GE | ND |
| 2023-06-06 | AF39876GE | ND |
| 2023-06-06 | AF39877GE | ND |
| 2023-06-07 | AF40081GE | ND |
| 2023-06-07 | AF40082GE | ND |
| 2023-06-07 | AF40083GE | ND |
| 2023-06-07 | AF40084GE | 0.693 ppb |
| 2023-09-11 | AF47036GE | ND |
| 2023-09-11 | AF47037GE | ND |
| 2023-09-11 | AF47038GE | ND |
| 2023-09-11 | AF47039GE | ND |
| 2023-09-12 | AF47143GE | ND |
| 2023-09-12 | AF47144GE | ND |
| 2023-09-12 | AF47145GE | ND |
| 2023-09-12 | AF47146GE | ND |
| 2023-09-12 | AF47147GE | 0.686 ppb |
| 2023-09-13 | AF47230GE | ND |
| 2023-09-13 | AF47231GE | ND |
| 2023-09-13 | AF47232GE | ND |
| 2023-12-04 | AF53197GE | ND |
| 2023-12-04 | AF53198GE | ND |
| 2023-12-04 | AF53199GE | ND |
| 2023-12-04 | AF53200GE | 0.607 ppb |
| 2023-12-05 | AF53315GE | ND |
| 2023-12-05 | AF53316GE | ND |
| 2023-12-05 | AF53317GE | ND |
| 2023-12-05 | AF53318GE | ND |
| 2023-12-06 | AF53376GE | ND |
| 2023-12-06 | AF53377GE | ND |
| 2023-12-06 | AF53378GE | ND |
| 2023-12-06 | AF53379GE | ND |
| 2023-12-06 | V300456527 300456529 | ND |
| 2023-12-06 | V300456525 300456531 | ND |
| 2023-12-06 | V300456533 300456535 | ND |