Dibromochloromethane
Southern Jackson County P S D
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 |
|---|---|---|---|---|
| 2014 | 1.01 ppb | 7 | 6 | ND - 1.60 ppb |
| 2015 | 1.24 ppb | 8 | 8 | 0.500 ppb - 4.73 ppb |
| 2016 | 0.624 ppb | 7 | 6 | ND - 1.23 ppb |
| 2017 | 0.694 ppb | 8 | 6 | ND - 1.29 ppb |
| 2018 | 0.484 ppb | 8 | 6 | ND - 0.860 ppb |
| 2019 | 0.445 ppb | 8 | 4 | ND - 1.20 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 |
|---|---|---|
| 2014-02-12 | DBP_1402C32-01A | ND |
| 2014-05-14 | DBP_1405G01-02A | 0.850 ppb |
| 2014-05-14 | DBP_1405G01-01A | 1.15 ppb |
| 2014-08-13 | DBP_1408G43-02A | 1.50 ppb |
| 2014-08-13 | DBP_1408G43-01A | 1.60 ppb |
| 2014-11-18 | S2DBP_1411L86-04 | 1.01 ppb |
| 2014-11-18 | S2DBP_1411L86-03 | 0.940 ppb |
| 2015-02-18 | S2DBP_1502K06-02 | 0.940 ppb |
| 2015-02-18 | S2DBP_1502K06-01 | 0.990 ppb |
| 2015-05-19 | S2DBP_1505N64-01 | 4.73 ppb |
| 2015-05-19 | S2DBP_1505N64-02 | 0.720 ppb |
| 2015-08-19 | S2DBP_1508N63-02 | 0.800 ppb |
| 2015-08-19 | S2DBP_1508N63-01 | 0.700 ppb |
| 2015-11-11 | 1511D61-02A | 0.570 ppb |
| 2015-11-11 | 1511D61-01A | 0.500 ppb |
| 2016-02-17 | 1602K57-02A | 0.440 ppb |
| 2016-02-17 | 1602K57-01A | 0.410 ppb |
| 2016-05-11 | 16051256-02A | 0.280 ppb |
| 2016-05-11 | 16051256-01A | ND |
| 2016-08-10 | 16081389-02A | 1.17 ppb |
| 2016-08-10 | 16081389-01A | 1.23 ppb |
| 2016-11-16 | 16112019-01A | 0.840 ppb |
| 2017-02-15 | 17021912-02A | ND |
| 2017-02-15 | 17021912-01A | ND |
| 2017-05-10 | 17051594-02A | 0.600 ppb |
| 2017-05-10 | 17051594-01A | 0.800 ppb |
| 2017-08-16 | 17082394-02A | 1.22 ppb |
| 2017-08-16 | 17082394-01A | 1.29 ppb |
| 2017-11-08 | 17111194-02A | 0.880 ppb |
| 2017-11-08 | 17111194-01A | 0.760 ppb |
| 2018-02-14 | 18021798-02A | ND |
| 2018-02-14 | 18021798-01A | ND |
| 2018-05-16 | 18052288-01A | 0.860 ppb |
| 2018-05-16 | 18052288-02A | 0.780 ppb |
| 2018-08-08 | 18081664-02A | 0.480 ppb |
| 2018-08-08 | 18081664-01A | 0.490 ppb |
| 2018-11-21 | 18112793-02A | 0.530 ppb |
| 2018-11-21 | 18112793-01A | 0.730 ppb |
| 2019-02-13 | 19021842-02A | ND |
| 2019-02-13 | 19021842-01A | ND |
| 2019-05-15 | 19052113-02A | ND |
| 2019-05-15 | 19052113-01A | ND |
| 2019-08-15 | 35491532002 | 1.10 ppb |
| 2019-08-15 | 35491532001 | 1.20 ppb |
| 2019-11-15 | 738610001 | 0.670 ppb |
| 2019-11-15 | 738610002 | 0.590 ppb |