Bromodichloromethane
Dona Ana MDWCA
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 |
|---|---|---|---|---|
| 2014 | ND | 12 | 0 | ND |
| 2015 | 0.750 ppb | 16 | 11 | ND - 4.40 ppb |
| 2016 | 1.01 ppb | 16 | 15 | ND - 6.10 ppb |
| 2017 | 1.18 ppb | 12 | 12 | 0.170 ppb - 5.90 ppb |
| 2018 | 2.57 ppb | 12 | 11 | ND - 8.40 ppb |
| 2019 | 3.98 ppb | 16 | 15 | ND - 11.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-31 | 1404082-001A | ND |
| 2014-03-31 | 1404055-001A | ND |
| 2014-03-31 | 1404083-001A | ND |
| 2014-03-31 | 1404081-001A | ND |
| 2014-08-20 | 1408C35-001A | ND |
| 2014-08-20 | 1408C17-001A | ND |
| 2014-08-20 | 1408C33-001A | ND |
| 2014-09-24 | 1409C74-001A | ND |
| 2014-12-16 | 1412987-001A | ND |
| 2014-12-16 | 1412984-001A | ND |
| 2014-12-16 | 1412986-001A | ND |
| 2014-12-16 | 1412985-001A | ND |
| 2015-03-24 | 1503C69-001A | ND |
| 2015-03-24 | 1503C67-001A | ND |
| 2015-03-24 | 1503C16-001A | ND |
| 2015-03-24 | 1503C68-001A | ND |
| 2015-06-10 | 2015017186 | 0.710 ppb |
| 2015-06-10 | 2015017187 | 0.190 ppb |
| 2015-06-10 | 2015017184 | 0.170 ppb |
| 2015-06-10 | 2015017185 | ND |
| 2015-09-01 | 2015026200 | 0.540 ppb |
| 2015-09-01 | 2015026199 | 0.840 ppb |
| 2015-09-01 | 2015026202 | 2.20 ppb |
| 2015-09-01 | 2015026201 | 1.10 ppb |
| 2015-12-14 | 2015036585 | 4.40 ppb |
| 2015-12-14 | 2015036584 | 1.10 ppb |
| 2015-12-14 | 2015036583 | 0.380 ppb |
| 2015-12-14 | 2015036582 | 0.370 ppb |
| 2016-03-08 | 2016006834 | 2.80 ppb |
| 2016-03-08 | 2016006832 | 1.20 ppb |
| 2016-03-08 | 2016006833 | 0.450 ppb |
| 2016-03-08 | 2016006835 | 0.330 ppb |
| 2016-06-09 | 2016016463 | 0.720 ppb |
| 2016-06-09 | 2016016465 | ND |
| 2016-06-09 | 2016016464 | 0.220 ppb |
| 2016-06-09 | 2016016462 | 0.530 ppb |
| 2016-09-14 | 2016026972 | 1.90 ppb |
| 2016-09-14 | 2016026973 | 0.380 ppb |
| 2016-09-14 | 2016026971 | 0.340 ppb |
| 2016-09-14 | 2016026974 | 0.330 ppb |
| 2016-12-06 | 2016035279 | 0.260 ppb |
| 2016-12-06 | 2016035278 | 0.260 ppb |
| 2016-12-06 | 2016035277 | 6.10 ppb |
| 2016-12-06 | 2016035276 | 0.350 ppb |
| 2017-03-30 | 2017009210 | 1.60 ppb |
| 2017-03-30 | 2017009213 | 0.570 ppb |
| 2017-03-30 | 2017009211 | 0.560 ppb |
| 2017-03-30 | 2017009212 | 0.270 ppb |
| 2017-06-13 | 2017017319 | 2.80 ppb |
| 2017-06-13 | 2017017317 | 0.370 ppb |
| 2017-06-13 | 2017017318 | 0.170 ppb |
| 2017-06-22 | 2017018392 | 0.650 ppb |
| 2017-09-06 | 2017025772 | 0.470 ppb |
| 2017-09-06 | 2017025771 | 0.420 ppb |
| 2017-09-06 | 2017025773 | 0.370 ppb |
| 2017-09-12 | 2017026440 | 5.90 ppb |
| 2018-03-07 | 2018006788 | 5.40 ppb |
| 2018-03-07 | 2018006787 | 1.20 ppb |
| 2018-03-07 | 2018006786 | 1.80 ppb |
| 2018-03-07 | 2018006785 | 1.70 ppb |
| 2018-06-12 | 2018016324 | 8.40 ppb |
| 2018-06-12 | 2018016321 | ND |
| 2018-06-12 | 2018016322 | 0.690 ppb |
| 2018-06-12 | 2018016323 | 0.970 ppb |
| 2018-12-04 | 2018033613 | 0.950 ppb |
| 2018-12-04 | 2018033614 | 1.60 ppb |
| 2018-12-04 | 2018033615 | 1.50 ppb |
| 2018-12-04 | 2018033627 | 6.60 ppb |
| 2019-03-06 | 2019005632 | 7.10 ppb |
| 2019-03-06 | 2019005633 | 2.00 ppb |
| 2019-03-06 | 2019005634 | ND |
| 2019-03-06 | 2019005637 | 2.80 ppb |
| 2019-06-05 | 2019015555 | 4.40 ppb |
| 2019-06-05 | 2019015556 | 1.60 ppb |
| 2019-06-05 | 2019015557 | 2.10 ppb |
| 2019-06-05 | 2019015558 | 5.00 ppb |
| 2019-09-09 | 2019025316 | 2.80 ppb |
| 2019-09-09 | 2019025318 | 1.10 ppb |
| 2019-09-09 | 2019025317 | 11.0 ppb |
| 2019-09-09 | 2019025315 | 3.70 ppb |
| 2019-12-12 | 2019035135 | 10.00 ppb |
| 2019-12-12 | 2019035134 | 1.70 ppb |
| 2019-12-12 | 2019035133 | 5.70 ppb |
| 2019-12-12 | 2019035132 | 2.60 ppb |