Dibromochloromethane
Avon Water Company
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 | 1.84 ppb | 26 | 16 | ND - 5.80 ppb |
| 2019 | 2.11 ppb | 24 | 15 | ND - 7.20 ppb |
| 2020 | 3.28 ppb | 18 | 16 | ND - 7.00 ppb |
| 2021 | 3.47 ppb | 18 | 17 | ND - 8.90 ppb |
| 2022 | 2.48 ppb | 23 | 17 | ND - 8.10 ppb |
| 2023 | 3.49 ppb | 17 | 16 | ND - 6.30 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 |
|---|---|---|
| 2018-01-24 | D8A1669-01VOC | 2.50 ppb |
| 2018-01-24 | D8A1669-02VOC | 2.30 ppb |
| 2018-01-24 | D8A1669-03VOC | 3.00 ppb |
| 2018-01-24 | D8A1669-04VOC | 1.50 ppb |
| 2018-03-05 | D8C0238-02VOC | ND |
| 2018-03-05 | D8C0238-03VOC | ND |
| 2018-03-05 | D8C0238-04VOC | ND |
| 2018-03-05 | D8C0238-05VOC | ND |
| 2018-03-05 | D8C0238-06VOC | ND |
| 2018-03-05 | D8C0238-07VOC | ND |
| 2018-03-05 | D8C0238-08VOC | ND |
| 2018-04-25 | D8D2151-08VOC | 0.800 ppb |
| 2018-04-25 | D8D2151-09VOC | 5.20 ppb |
| 2018-04-25 | D8D2151-10VOC | 2.80 ppb |
| 2018-04-25 | D8D2151-11VOC | 3.90 ppb |
| 2018-04-25 | D8D2151-07VOC | ND |
| 2018-07-26 | CA98743 | 0.630 ppb |
| 2018-07-26 | CA98744 | 4.20 ppb |
| 2018-07-26 | CA98745 | 1.90 ppb |
| 2018-07-26 | CA98746 | 4.10 ppb |
| 2018-07-26 | CA98747 | ND |
| 2018-10-09 | DBP 200508664 | 2.90 ppb |
| 2018-10-09 | DBP 200508665 | 2.60 ppb |
| 2018-10-09 | DBP 200508676 | 3.80 ppb |
| 2018-10-09 | DBP 200508678 | 5.80 ppb |
| 2018-10-09 | VOC1 200508699 | ND |
| 2019-01-08 | DBP 200518131 | 1.80 ppb |
| 2019-01-08 | DBP 200518132 | ND |
| 2019-01-08 | DBP 200518133 | 1.70 ppb |
| 2019-01-08 | DBP 200518135 | 1.60 ppb |
| 2019-01-29 | VOC1 200519992 | ND |
| 2019-01-29 | VOC1 200519993 | ND |
| 2019-01-29 | VOC1 200519991 | ND |
| 2019-01-29 | VOC1 200519996 | ND |
| 2019-01-29 | VOC1 200519994 | ND |
| 2019-01-29 | VOC1 200519995 | ND |
| 2019-04-11 | DBP 200528267 | 2.30 ppb |
| 2019-04-11 | DBP 200528268 | 5.10 ppb |
| 2019-04-11 | DBP 200528269 | 3.20 ppb |
| 2019-04-11 | DBP 200528270 | 3.10 ppb |
| 2019-04-16 | VOC1 200528742 | ND |
| 2019-07-02 | DBP 200538992 | 1.20 ppb |
| 2019-07-02 | DBP 200538993 | 6.10 ppb |
| 2019-07-02 | DBP 200538995 | 3.90 ppb |
| 2019-07-02 | DBP 200538996 | 4.70 ppb |
| 2019-08-13 | VOC1 200544842 | ND |
| 2019-10-03 | DBP 200551429 | 1.10 ppb |
| 2019-10-03 | DBP 200551430 | 7.20 ppb |
| 2019-10-03 | DBP 200551431 | 3.10 ppb |
| 2019-10-03 | DBP 200551432 | 4.50 ppb |
| 2020-01-09 | DBP 200562755 | 1.10 ppb |
| 2020-01-09 | DBP 200562756 | 2.60 ppb |
| 2020-01-09 | DBP 200562757 | 2.70 ppb |
| 2020-01-09 | DBP 200562758 | 2.60 ppb |
| 2020-04-16 | DBP 200572926 | 2.10 ppb |
| 2020-04-16 | DBP 200572927 | 4.30 ppb |
| 2020-04-16 | DBP 200572928 | 3.60 ppb |
| 2020-04-16 | DBP 200572929 | 6.50 ppb |
| 2020-07-20 | DBP 200583413 | 1.10 ppb |
| 2020-07-20 | DBP 200583414 | 5.20 ppb |
| 2020-07-20 | DBP 200583415 | 2.80 ppb |
| 2020-07-20 | DBP 200583416 | 5.70 ppb |
| 2020-08-10 | VOC1 200585683 | ND |
| 2020-08-10 | VOC1 200586606 | ND |
| 2020-10-21 | DBP 200595044 | 1.10 ppb |
| 2020-10-21 | DBP 200595045 | 4.00 ppb |
| 2020-10-21 | DBP 200595046 | 6.70 ppb |
| 2020-10-21 | DBP 200595047 | 7.00 ppb |
| 2021-01-07 | DBP 200603402 | 2.20 ppb |
| 2021-01-07 | DBP 200603404 | 2.10 ppb |
| 2021-01-07 | DBP 200603405 | 6.30 ppb |
| 2021-01-07 | DBP 200603406 | 6.40 ppb |
| 2021-04-15 | DBP 200613652 | 1.70 ppb |
| 2021-04-15 | DBP 200613653 | 3.20 ppb |
| 2021-04-15 | DBP 200613654 | 3.60 ppb |
| 2021-04-15 | DBP 200613655 | 3.90 ppb |
| 2021-06-01 | VOC1 200619066 | 0.600 ppb |
| 2021-06-08 | VOC1 200620139 | ND |
| 2021-07-01 | DBP 200623334 | 0.900 ppb |
| 2021-07-01 | DBP 200623335 | 1.50 ppb |
| 2021-07-01 | DBP 200623336 | 8.40 ppb |
| 2021-07-01 | DBP 200623338 | 8.90 ppb |
| 2021-10-12 | H300079406 300079410 | 2.70 ppb |
| 2021-10-12 | H300079407 300079412 | 4.60 ppb |
| 2021-10-12 | H300079408 300079414 | 4.40 ppb |
| 2021-10-12 | H300079409 300079416 | 1.000 ppb |
| 2022-01-14 | CK17779 | 1.20 ppb |
| 2022-01-14 | CK17780 | 2.00 ppb |
| 2022-01-14 | CK17781 | 2.30 ppb |
| 2022-01-17 | CK17776 | ND |
| 2022-01-17 | CK17777 | ND |
| 2022-01-17 | CK17778 | ND |
| 2022-01-18 | CK17774 | 0.730 ppb |
| 2022-03-24 | CK96357 | ND |
| 2022-03-28 | CK96358 | ND |
| 2022-03-28 | CK96359 | 1.70 ppb |
| 2022-04-15 | CL11166 | 2.40 ppb |
| 2022-04-15 | CL11167 | 3.40 ppb |
| 2022-04-15 | CL11168 | 3.40 ppb |
| 2022-04-15 | CL11169 | 5.30 ppb |
| 2022-07-08 | CL75309 | 0.650 ppb |
| 2022-07-08 | CL75310 | 8.10 ppb |
| 2022-07-08 | CL75311 | 4.30 ppb |
| 2022-07-08 | CL75312 | 3.80 ppb |
| 2022-08-18 | CM11956 | ND |
| 2022-10-21 | CM69248 | 2.90 ppb |
| 2022-10-21 | CM69249 | 4.50 ppb |
| 2022-10-21 | CM69250 | 5.00 ppb |
| 2022-10-21 | CM69251 | 5.30 ppb |
| 2023-01-11 | CN21964 | 1.60 ppb |
| 2023-01-12 | CN24188 | 4.00 ppb |
| 2023-01-12 | CN24189 | 5.00 ppb |
| 2023-01-12 | CN24190 | 5.10 ppb |
| 2023-03-03 | CN54373 | ND |
| 2023-04-14 | CN85862 | 2.10 ppb |
| 2023-04-14 | CN85863 | 3.40 ppb |
| 2023-04-14 | CN85864 | 3.20 ppb |
| 2023-04-14 | CN85865 | 2.70 ppb |
| 2023-07-13 | CO53041 | 0.900 ppb |
| 2023-07-13 | CO53042 | 3.50 ppb |
| 2023-07-13 | CO53043 | 4.10 ppb |
| 2023-07-25 | CO58855 | 5.10 ppb |
| 2023-10-04 | CP17807 | 1.80 ppb |
| 2023-10-04 | CP17808 | 6.30 ppb |
| 2023-10-04 | CP17809 | 5.80 ppb |
| 2023-10-04 | CP17810 | 4.70 ppb |