Bromodichloromethane
Metropolitan District Commission
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 | 4.49 ppb | 51 | 51 | 2.25 ppb - 6.96 ppb |
| 2019 | 4.46 ppb | 51 | 51 | 2.72 ppb - 6.66 ppb |
| 2020 | 4.23 ppb | 51 | 51 | 0.638 ppb - 6.01 ppb |
| 2021 | 4.18 ppb | 51 | 49 | ND - 6.13 ppb |
| 2022 | 4.56 ppb | 51 | 51 | 0.733 ppb - 6.78 ppb |
| 2023 | 4.26 ppb | 51 | 50 | ND - 6.58 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 |
|---|---|---|
| 2018-03-05 | AD89780GE | 4.20 ppb |
| 2018-03-05 | AD89784GE | 4.40 ppb |
| 2018-03-06 | AD89779GE | 5.40 ppb |
| 2018-03-06 | AD89785GE | 3.50 ppb |
| 2018-03-06 | AD89781GE | 3.80 ppb |
| 2018-03-06 | AD89782GE | 4.40 ppb |
| 2018-03-06 | AD89783GE | 3.00 ppb |
| 2018-03-06 | AD89776GE | 4.50 ppb |
| 2018-03-06 | AD89777GE | 4.30 ppb |
| 2018-03-08 | AD89786GE | 3.00 ppb |
| 2018-03-08 | AD89787GE | 4.30 ppb |
| 2018-03-09 | AD89778GE | 2.80 ppb |
| 2018-06-11 | AD98391GE | 4.71 ppb |
| 2018-06-11 | AD98395GE | 4.66 ppb |
| 2018-06-12 | AD98396GE | 3.82 ppb |
| 2018-06-12 | AD98390GE | 6.15 ppb |
| 2018-06-12 | AD98394GE | 3.34 ppb |
| 2018-06-13 | AD98387GE | 5.53 ppb |
| 2018-06-13 | AD98388GE | 4.42 ppb |
| 2018-06-13 | AD98392GE | 3.50 ppb |
| 2018-06-13 | AD98393GE | 4.21 ppb |
| 2018-06-14 | AD98397GE | 3.54 ppb |
| 2018-06-14 | AD98398GE | 5.35 ppb |
| 2018-06-15 | AD98389GE | 3.19 ppb |
| 2018-07-16 | AE00911GE | 2.94 ppb |
| 2018-07-16 | AE00927GE | 3.08 ppb |
| 2018-07-16 | AE00912GE | 2.25 ppb |
| 2018-09-05 | AE06391GE | 6.07 ppb |
| 2018-09-05 | AE06392GE | 5.65 ppb |
| 2018-09-05 | AE06396GE | 4.20 ppb |
| 2018-09-05 | AE06397GE | 4.98 ppb |
| 2018-09-06 | AE06394GE | 5.77 ppb |
| 2018-09-06 | AE06399GE | 5.33 ppb |
| 2018-09-06 | AE06400GE | 4.32 ppb |
| 2018-09-06 | AE06401GE | 3.78 ppb |
| 2018-09-06 | AE06402GE | 5.95 ppb |
| 2018-09-07 | AE06393GE | 3.67 ppb |
| 2018-09-07 | AE06395GE | 5.46 ppb |
| 2018-09-07 | AE06398GE | 4.68 ppb |
| 2018-12-03 | AE14329GE | 6.96 ppb |
| 2018-12-03 | AE14330GE | 5.49 ppb |
| 2018-12-03 | AE14334GE | 4.77 ppb |
| 2018-12-04 | AE14335GE | 4.64 ppb |
| 2018-12-04 | AE14333GE | 3.86 ppb |
| 2018-12-05 | AE14331GE | 5.75 ppb |
| 2018-12-05 | AE14332GE | 5.48 ppb |
| 2018-12-05 | AE14326GE | 5.62 ppb |
| 2018-12-05 | AE14327GE | 5.44 ppb |
| 2018-12-06 | AE14336GE | 3.05 ppb |
| 2018-12-06 | AE14337GE | 6.03 ppb |
| 2018-12-07 | AE14328GE | 3.63 ppb |
| 2019-03-11 | AE22328GE | 3.80 ppb |
| 2019-03-11 | AE22324GE | 3.87 ppb |
| 2019-03-12 | AE22327GE | 2.84 ppb |
| 2019-03-12 | AE22329GE | 3.61 ppb |
| 2019-03-12 | AE22323GE | 4.77 ppb |
| 2019-03-13 | AE22320GE | 4.17 ppb |
| 2019-03-13 | AE22321GE | 3.70 ppb |
| 2019-03-13 | AE22325GE | 4.09 ppb |
| 2019-03-13 | AE22326GE | 3.96 ppb |
| 2019-03-14 | AE22330GE | 3.03 ppb |
| 2019-03-14 | AE22331GE | 4.43 ppb |
| 2019-03-15 | AE22322GE | 2.74 ppb |
| 2019-06-03 | AE30192GE | 4.98 ppb |
| 2019-06-03 | AE30196GE | 5.22 ppb |
| 2019-06-04 | AE30197GE | 4.23 ppb |
| 2019-06-04 | AE30191GE | 6.66 ppb |
| 2019-06-04 | AE30195GE | 3.96 ppb |
| 2019-06-05 | AE30193GE | 4.09 ppb |
| 2019-06-05 | AE30194GE | 4.79 ppb |
| 2019-06-05 | AE30188GE | 5.42 ppb |
| 2019-06-05 | AE30189GE | 5.07 ppb |
| 2019-06-05 | AE29314GE | 2.96 ppb |
| 2019-06-05 | AE29313GE | 3.18 ppb |
| 2019-06-05 | AE29315GE | 2.72 ppb |
| 2019-06-06 | AE30198GE | 4.06 ppb |
| 2019-06-06 | AE30199GE | 6.05 ppb |
| 2019-06-07 | AE30190GE | 3.58 ppb |
| 2019-09-09 | AE38255GE | 5.78 ppb |
| 2019-09-09 | AE38259GE | 5.18 ppb |
| 2019-09-10 | AE38260GE | 4.78 ppb |
| 2019-09-10 | AE38258GE | 4.66 ppb |
| 2019-09-10 | AE38254GE | 5.96 ppb |
| 2019-09-11 | AE38256GE | 4.68 ppb |
| 2019-09-11 | AE38257GE | 5.75 ppb |
| 2019-09-11 | AE38251GE | 5.86 ppb |
| 2019-09-11 | AE38252GE | 4.14 ppb |
| 2019-09-12 | AE38261GE | 3.91 ppb |
| 2019-09-12 | AE38262GE | 6.36 ppb |
| 2019-09-13 | AE38253GE | 4.17 ppb |
| 2019-12-02 | AE45710GE | 4.55 ppb |
| 2019-12-02 | AE45714GE | 4.75 ppb |
| 2019-12-03 | AE45715GE | 4.14 ppb |
| 2019-12-03 | AE45709GE | 5.62 ppb |
| 2019-12-03 | AE45713GE | 3.43 ppb |
| 2019-12-04 | AE45706GE | 5.25 ppb |
| 2019-12-04 | AE45707GE | 4.66 ppb |
| 2019-12-04 | AE45711GE | 4.77 ppb |
| 2019-12-04 | AE45712GE | 5.43 ppb |
| 2019-12-05 | AE45716GE | 2.84 ppb |
| 2019-12-05 | AE45717GE | 5.99 ppb |
| 2019-12-06 | AE45708GE | 3.03 ppb |
| 2020-03-02 | AE52330GE | 5.20 ppb |
| 2020-03-02 | AE52331GE | 4.12 ppb |
| 2020-03-02 | AE52332GE | 4.40 ppb |
| 2020-03-02 | AE52333GE | 5.01 ppb |
| 2020-03-02 | AE52334GE | 2.98 ppb |
| 2020-03-02 | AE52335GE | 4.00 ppb |
| 2020-03-02 | AE52336GE | 3.80 ppb |
| 2020-03-03 | AE53110GE | 4.58 ppb |
| 2020-03-03 | AE53111GE | 4.28 ppb |
| 2020-03-03 | AE53112GE | 2.89 ppb |
| 2020-03-03 | AE53113GE | 2.52 ppb |
| 2020-03-03 | AE53114GE | 4.74 ppb |
| 2020-06-01 | AE60029GE | 5.07 ppb |
| 2020-06-01 | AE60030GE | 3.03 ppb |
| 2020-06-01 | AE60033GE | 4.51 ppb |
| 2020-06-01 | AE60034GE | 3.70 ppb |
| 2020-06-01 | AE60035GE | 4.89 ppb |
| 2020-06-01 | AE60037GE | 4.65 ppb |
| 2020-06-01 | AE60038GE | 3.43 ppb |
| 2020-06-02 | AE60039GE | 3.05 ppb |
| 2020-06-02 | AE60040GE | 5.48 ppb |
| 2020-06-02 | AE60036GE | 3.15 ppb |
| 2020-06-02 | AE60031GE | 3.12 ppb |
| 2020-06-02 | AE60032GE | 4.98 ppb |
| 2020-06-02 | AE59301GE | 2.56 ppb |
| 2020-06-02 | AE59305GE | 2.85 ppb |
| 2020-06-02 | AE59302GE | 2.31 ppb |
| 2020-09-08 | AE67031GE | 5.86 ppb |
| 2020-09-08 | AE67032GE | 5.05 ppb |
| 2020-09-08 | AE67035GE | 4.34 ppb |
| 2020-09-08 | AE67036GE | 4.84 ppb |
| 2020-09-08 | AE67037GE | 4.34 ppb |
| 2020-09-08 | AE67038GE | 3.72 ppb |
| 2020-09-09 | AE67033GE | 3.89 ppb |
| 2020-09-09 | AE67034GE | 5.18 ppb |
| 2020-09-09 | AE67028GE | 5.81 ppb |
| 2020-09-09 | AE67029GE | 5.67 ppb |
| 2020-09-10 | AE67030GE | 3.60 ppb |
| 2020-09-10 | AE67039GE | 5.79 ppb |
| 2020-12-01 | AE73075GE | 3.41 ppb |
| 2020-12-01 | AE73076GE | 5.12 ppb |
| 2020-12-01 | AE73077GE | 3.86 ppb |
| 2020-12-01 | AE73078GE | 6.01 ppb |
| 2020-12-01 | AE73081GE | 4.23 ppb |
| 2020-12-01 | AE73082GE | 4.33 ppb |
| 2020-12-01 | AE73083GE | 5.69 ppb |
| 2020-12-01 | AE73084GE | 5.10 ppb |
| 2020-12-01 | AE73085GE | 5.55 ppb |
| 2020-12-01 | AE73086GE | 4.27 ppb |
| 2020-12-01 | AE73087GE | 0.638 ppb |
| 2020-12-01 | AE73088GE | 4.38 ppb |
| 2021-03-01 | AE79601GE | 4.62 ppb |
| 2021-03-01 | AE79604GE | 3.89 ppb |
| 2021-03-02 | AE79687GE | 3.04 ppb |
| 2021-03-02 | AE79692GE | 2.64 ppb |
| 2021-03-02 | AE79694GE | 3.34 ppb |
| 2021-03-03 | AE79775GE | 3.84 ppb |
| 2021-03-03 | AE79776GE | 5.32 ppb |
| 2021-03-03 | AE79779GE | 4.12 ppb |
| 2021-03-03 | AE79780GE | 5.13 ppb |
| 2021-03-03 | AE79821GE | 2.69 ppb |
| 2021-03-03 | AE79822GE | ND |
| 2021-03-04 | AE79871GE | 4.16 ppb |
| 2021-06-01 | AE86386GE | 3.28 ppb |
| 2021-06-01 | AE86387GE | 4.54 ppb |
| 2021-06-01 | AE86388GE | 5.06 ppb |
| 2021-06-01 | AE86389GE | 3.92 ppb |
| 2021-06-01 | AE86390GE | 5.28 ppb |
| 2021-06-01 | AE86392GE | 5.36 ppb |
| 2021-06-01 | AE86393GE | 3.19 ppb |
| 2021-06-02 | AE86482GE | 4.66 ppb |
| 2021-06-02 | AE86484GE | 3.17 ppb |
| 2021-06-02 | AE86485GE | 4.90 ppb |
| 2021-06-02 | AE86487GE | 3.71 ppb |
| 2021-06-02 | AE86489GE | 5.53 ppb |
| 2021-09-07 | AE94499GE | 3.96 ppb |
| 2021-09-07 | AE94500GE | 5.98 ppb |
| 2021-09-07 | AE94501GE | 4.71 ppb |
| 2021-09-07 | AE94502GE | 3.77 ppb |
| 2021-09-07 | AE94495GE | 5.76 ppb |
| 2021-09-07 | AE94496GE | 5.85 ppb |
| 2021-09-08 | AE94497GE | 4.37 ppb |
| 2021-09-08 | AE94498GE | 5.43 ppb |
| 2021-09-08 | AE94503GE | 6.13 ppb |
| 2021-09-08 | AE94492GE | 5.57 ppb |
| 2021-09-08 | AE94493GE | 5.93 ppb |
| 2021-09-08 | AE94494GE | 3.93 ppb |
| 2021-11-23 | V300107450 300107457 | 2.80 ppb |
| 2021-11-23 | V300107451 300107463 | 2.50 ppb |
| 2021-11-29 | V300109635 300109637 | 2.50 ppb |
| 2021-12-07 | AF01258GE | ND |
| 2021-12-07 | AF01259GE | 4.72 ppb |
| 2021-12-07 | AF01262GE | 3.43 ppb |
| 2021-12-07 | AF01264GE | 4.03 ppb |
| 2021-12-08 | AF01255GE | 5.16 ppb |
| 2021-12-08 | AF01260GE | 5.02 ppb |
| 2021-12-08 | AF01261GE | 4.70 ppb |
| 2021-12-09 | AF01265GE | 3.27 ppb |
| 2021-12-09 | AF01266GE | 5.93 ppb |
| 2021-12-09 | AF01263GE | 5.00 ppb |
| 2021-12-10 | AF01256GE | 4.46 ppb |
| 2021-12-10 | AF01257GE | 3.11 ppb |
| 2022-03-07 | AF07835GE | 4.26 ppb |
| 2022-03-07 | AF07839GE | 4.87 ppb |
| 2022-03-08 | AF07840GE | 4.12 ppb |
| 2022-03-08 | AF07838GE | 3.38 ppb |
| 2022-03-08 | AF07834GE | 3.88 ppb |
| 2022-03-09 | AF07836GE | 3.74 ppb |
| 2022-03-09 | AF07837GE | 4.70 ppb |
| 2022-03-09 | AF07831GE | 4.99 ppb |
| 2022-03-10 | AF07841GE | 2.97 ppb |
| 2022-03-10 | AF07842GE | 5.09 ppb |
| 2022-03-11 | AF07832GE | 4.63 ppb |
| 2022-03-11 | AF07833GE | 3.20 ppb |
| 2022-06-06 | AF13657GE | 3.18 ppb |
| 2022-06-06 | AF13658GE | 4.64 ppb |
| 2022-06-06 | AF13659GE | 4.92 ppb |
| 2022-06-06 | AF13660GE | 5.24 ppb |
| 2022-06-06 | AF13661GE | 3.69 ppb |
| 2022-06-06 | AF13662GE | 3.99 ppb |
| 2022-06-06 | AF13663GE | 4.86 ppb |
| 2022-06-06 | AF13664GE | 3.97 ppb |
| 2022-06-06 | AF13665GE | 5.43 ppb |
| 2022-06-06 | AF13666GE | 3.68 ppb |
| 2022-06-06 | AF13667GE | 3.33 ppb |
| 2022-06-06 | AF13668GE | 5.91 ppb |
| 2022-09-06 | AF20645GE | 6.78 ppb |
| 2022-09-06 | AF20646GE | 5.99 ppb |
| 2022-09-06 | AF20649GE | 4.35 ppb |
| 2022-09-06 | AF20650GE | 6.29 ppb |
| 2022-09-06 | AF20651GE | 5.23 ppb |
| 2022-09-06 | AF20652GE | 4.57 ppb |
| 2022-09-07 | AF20647GE | 4.69 ppb |
| 2022-09-07 | AF20648GE | 6.26 ppb |
| 2022-09-07 | AF20642GE | 6.06 ppb |
| 2022-09-07 | AF20643GE | 6.61 ppb |
| 2022-09-08 | AF20644GE | 4.40 ppb |
| 2022-09-08 | AF20653GE | 6.56 ppb |
| 2022-12-05 | AF27781GE | 6.02 ppb |
| 2022-12-05 | AF27777GE | 5.23 ppb |
| 2022-12-06 | AF27780GE | 3.62 ppb |
| 2022-12-06 | AF27782GE | 5.08 ppb |
| 2022-12-06 | AF27776GE | 0.733 ppb |
| 2022-12-07 | AF27773GE | 6.52 ppb |
| 2022-12-07 | AF27778GE | 4.32 ppb |
| 2022-12-07 | AF27779GE | 5.52 ppb |
| 2022-12-08 | AF27783GE | 3.44 ppb |
| 2022-12-08 | AF27784GE | 6.71 ppb |
| 2022-12-09 | AF27774GE | 4.91 ppb |
| 2022-12-09 | AF27775GE | 3.23 ppb |
| 2022-12-15 | V300287053 300287060 | 2.40 ppb |
| 2022-12-15 | V300287072 300287079 | 2.40 ppb |
| 2022-12-15 | V300287100 300287107 | 2.20 ppb |
| 2023-03-06 | AF33278GE | 3.14 ppb |
| 2023-03-06 | AF33279GE | 4.41 ppb |
| 2023-03-06 | AF33280GE | 2.98 ppb |
| 2023-03-06 | AF33281GE | 2.88 ppb |
| 2023-03-06 | AF33282GE | 6.10 ppb |
| 2023-03-06 | AF33283GE | 5.25 ppb |
| 2023-03-07 | AF33357GE | 4.34 ppb |
| 2023-03-07 | AF33358GE | 1.06 ppb |
| 2023-03-07 | AF33360GE | 3.81 ppb |
| 2023-03-07 | AF33361GE | 5.50 ppb |
| 2023-03-07 | AF33362GE | 3.65 ppb |
| 2023-03-07 | AF33363GE | 4.15 ppb |
| 2023-06-05 | AF39761GE | 3.05 ppb |
| 2023-06-05 | AF39762GE | 5.40 ppb |
| 2023-06-05 | AF39763GE | 5.42 ppb |
| 2023-06-05 | AF39764GE | 3.85 ppb |
| 2023-06-06 | AF39874GE | 5.19 ppb |
| 2023-06-06 | AF39875GE | 5.79 ppb |
| 2023-06-06 | AF39876GE | 4.05 ppb |
| 2023-06-06 | AF39877GE | 4.29 ppb |
| 2023-06-07 | AF40081GE | 6.04 ppb |
| 2023-06-07 | AF40082GE | 4.49 ppb |
| 2023-06-07 | AF40083GE | 4.57 ppb |
| 2023-06-07 | AF40084GE | 6.58 ppb |
| 2023-09-11 | AF47036GE | 4.93 ppb |
| 2023-09-11 | AF47037GE | 3.39 ppb |
| 2023-09-11 | AF47038GE | 5.19 ppb |
| 2023-09-11 | AF47039GE | 5.79 ppb |
| 2023-09-12 | AF47143GE | 5.33 ppb |
| 2023-09-12 | AF47144GE | 3.30 ppb |
| 2023-09-12 | AF47145GE | 4.31 ppb |
| 2023-09-12 | AF47146GE | 3.42 ppb |
| 2023-09-12 | AF47147GE | 5.75 ppb |
| 2023-09-13 | AF47230GE | 5.22 ppb |
| 2023-09-13 | AF47231GE | 3.54 ppb |
| 2023-09-13 | AF47232GE | 4.88 ppb |
| 2023-12-04 | AF53197GE | 4.71 ppb |
| 2023-12-04 | AF53198GE | 5.40 ppb |
| 2023-12-04 | AF53199GE | 3.09 ppb |
| 2023-12-04 | AF53200GE | 6.18 ppb |
| 2023-12-05 | AF53315GE | 3.47 ppb |
| 2023-12-05 | AF53316GE | ND |
| 2023-12-05 | AF53317GE | 3.38 ppb |
| 2023-12-05 | AF53318GE | 4.41 ppb |
| 2023-12-06 | AF53376GE | 5.34 ppb |
| 2023-12-06 | AF53377GE | 4.68 ppb |
| 2023-12-06 | AF53378GE | 4.02 ppb |
| 2023-12-06 | AF53379GE | 4.77 ppb |
| 2023-12-06 | V300456527 300456529 | 2.40 ppb |
| 2023-12-06 | V300456525 300456531 | 2.30 ppb |
| 2023-12-06 | V300456533 300456535 | 2.20 ppb |