Dibromochloromethane
Philmont Boy Scout Ranch - Headquarters
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 | 11.2 ppb | 1 | 1 | 11.2 ppb |
| 2015 | 0.239 ppb | 8 | 4 | ND - 0.630 ppb |
| 2016 | 0.589 ppb | 8 | 7 | ND - 1.000 ppb |
| 2017 | 0.416 ppb | 8 | 8 | 0.170 ppb - 0.660 ppb |
| 2018 | 0.620 ppb | 8 | 8 | 0.470 ppb - 0.810 ppb |
| 2019 | 0.574 ppb | 8 | 8 | 0.310 ppb - 1.10 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 |
|---|---|---|
| 2014-08-14 | 1408796-001A | 11.2 ppb |
| 2015-02-12 | 1502618-001A | ND |
| 2015-02-12 | 1502619-001A | ND |
| 2015-05-26 | 1505B39-001A | ND |
| 2015-05-26 | 1505B38-001A | ND |
| 2015-08-06 | 2015022661 | 0.630 ppb |
| 2015-08-06 | 2015022660 | 0.620 ppb |
| 2015-11-19 | 2015034532 | 0.330 ppb |
| 2015-11-19 | 2015034533 | 0.330 ppb |
| 2016-02-22 | 2016005134 | 0.850 ppb |
| 2016-02-22 | 2016005133 | 0.820 ppb |
| 2016-05-05 | 2016012717 | 0.210 ppb |
| 2016-05-05 | 2016012718 | ND |
| 2016-08-17 | 2016024304 | 1.000 ppb |
| 2016-08-17 | 2016024305 | 0.410 ppb |
| 2016-11-29 | 2016034251 | 0.720 ppb |
| 2016-11-29 | 2016034252 | 0.700 ppb |
| 2017-02-22 | 2017005506 | 0.360 ppb |
| 2017-02-22 | 2017005505 | 0.290 ppb |
| 2017-05-19 | 2017015722 | 0.270 ppb |
| 2017-05-23 | 2017015723 | 0.170 ppb |
| 2017-08-07 | 2017022771 | 0.470 ppb |
| 2017-08-07 | 2017022770 | 0.480 ppb |
| 2017-11-14 | 2017032577 | 0.660 ppb |
| 2017-11-14 | 2017032578 | 0.630 ppb |
| 2018-02-06 | 2018003752 | 0.810 ppb |
| 2018-02-06 | 2018003751 | 0.790 ppb |
| 2018-04-30 | 2018011873 | 0.530 ppb |
| 2018-04-30 | 2018011874 | 0.560 ppb |
| 2018-08-15 | 2018023017 | 0.680 ppb |
| 2018-08-15 | 2018023018 | 0.640 ppb |
| 2018-11-12 | 2018032062 | 0.480 ppb |
| 2018-11-12 | 2018032063 | 0.470 ppb |
| 2019-02-19 | 2019004270 | 0.520 ppb |
| 2019-02-19 | 2019004271 | 0.510 ppb |
| 2019-05-21 | 2019014163 | 0.320 ppb |
| 2019-05-21 | 2019014164 | 0.310 ppb |
| 2019-08-05 | 2019021579 | 0.430 ppb |
| 2019-08-05 | 2019021580 | 0.440 ppb |
| 2019-11-11 | 2019032113 | 0.960 ppb |
| 2019-11-11 | 2019032112 | 1.10 ppb |