Dibromochloromethane
Ripley City Of
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 | 0.776 ppb | 5 | 4 | ND - 1.20 ppb |
| 2015 | 0.627 ppb | 9 | 6 | ND - 2.10 ppb |
| 2016 | 0.331 ppb | 8 | 6 | ND - 0.700 ppb |
| 2017 | 0.401 ppb | 8 | 6 | ND - 0.710 ppb |
| 2018 | 0.273 ppb | 8 | 6 | ND - 0.510 ppb |
| 2019 | 0.156 ppb | 8 | 3 | ND - 0.480 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 |
|---|---|---|
| 2014-02-19 | THM_1402I93-02A | ND |
| 2014-05-21 | DBP_1405O70-01A | 0.850 ppb |
| 2014-08-20 | DBP_1408N23-01A | 1.20 ppb |
| 2014-11-19 | S2DBP_1411L80-01 | 0.920 ppb |
| 2014-11-19 | S2DBP_1411L78-01 | 0.910 ppb |
| 2015-02-04 | S2DBP_1502416-02 | ND |
| 2015-02-04 | S2DBP_1502416-01 | ND |
| 2015-05-06 | S2DBP_1505A12-02 | 0.330 ppb |
| 2015-05-06 | S2DBP_1505A12-01 | 0.370 ppb |
| 2015-08-05 | S2DBP_1508479-01 | 2.10 ppb |
| 2015-08-05 | S2DBP_1508479-02 | 2.00 ppb |
| 2015-08-28 | S2DBP_1508Y36-01 | 0.430 ppb |
| 2015-11-11 | 1511H09-02A | 0.410 ppb |
| 2015-11-11 | 1511H09-01A | ND |
| 2016-02-10 | 1602D64-02A | ND |
| 2016-02-10 | 1602D64-01A | 0.260 ppb |
| 2016-05-04 | 16050449-02A | 0.260 ppb |
| 2016-05-04 | 16050449-01A | 0.330 ppb |
| 2016-08-10 | 16081545-02A | ND |
| 2016-08-10 | 16081545-01A | 0.420 ppb |
| 2016-11-02 | 16110290-02A | 0.680 ppb |
| 2016-11-02 | 16110288-01A | 0.700 ppb |
| 2017-02-08 | 17021067-02A | ND |
| 2017-02-08 | 17021067-01A | ND |
| 2017-05-10 | 17051596-03A | 0.500 ppb |
| 2017-05-10 | 17051596-02A | 0.600 ppb |
| 2017-08-09 | 17081617-02A | 0.710 ppb |
| 2017-08-09 | 17081614-02A | 0.640 ppb |
| 2017-11-15 | 17112115-01A | 0.410 ppb |
| 2017-11-15 | 17112110-01A | 0.350 ppb |
| 2018-02-07 | 18021002-02A | 0.380 ppb |
| 2018-02-07 | 18020998-02A | ND |
| 2018-05-09 | 18051455-02A | 0.280 ppb |
| 2018-05-09 | 18051464-01A | 0.250 ppb |
| 2018-08-09 | 18081789-02A | 0.450 ppb |
| 2018-08-09 | 18081789-01A | 0.510 ppb |
| 2018-11-29 | 18113624-02A | ND |
| 2018-11-29 | 18113624-01A | 0.310 ppb |
| 2019-02-14 | 19021821-02A | ND |
| 2019-02-14 | 19021821-01A | ND |
| 2019-05-09 | 19051251-02A | ND |
| 2019-05-09 | 19051251-01A | 0.300 ppb |
| 2019-08-08 | 35489614002 | ND |
| 2019-08-08 | 35489614001 | ND |
| 2019-11-07 | 737770001 | 0.480 ppb |
| 2019-11-07 | 737770002 | 0.470 ppb |