Dibromochloromethane
City of Ceres
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.
107
Samples
0
Samples exceeding legal limit (MCL)
44
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.634 ppb | 17 | 8 | ND - 2.80 ppb |
| 2015 | 0.400 ppb | 12 | 6 | ND - 1.30 ppb |
| 2016 | 0.268 ppb | 24 | 6 | ND - 1.30 ppb |
| 2017 | 0.322 ppb | 24 | 11 | ND - 1.10 ppb |
| 2018 | 0.599 ppb | 8 | 4 | ND - 1.80 ppb |
| 2019 | 0.331 ppb | 22 | 9 | ND - 1.30 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 |
|---|---|---|
| 2014-01-07 | 5806-900-1315 | ND |
| 2014-01-07 | 5806-901-1325 | 0.570 ppb |
| 2014-01-07 | 5806-902-1305 | 1.10 ppb |
| 2014-01-07 | 5806-903-1340 | 0.500 ppb |
| 2014-04-07 | 5806-900-1425 | 1.70 ppb |
| 2014-04-07 | 5806-901-1435 | 1.60 ppb |
| 2014-04-07 | 5806-902-1505 | 1.90 ppb |
| 2014-04-07 | 5806-903-1520 | 2.80 ppb |
| 2014-07-09 | 5806-900-1400 | ND |
| 2014-07-09 | 5806-901-1350 | ND |
| 2014-07-09 | 5806-902-1315 | 0.610 ppb |
| 2014-07-09 | 5806-903-1330 | ND |
| 2014-07-10 | 5806-014-0800 | ND |
| 2014-07-10 | 5806-016-1120 | ND |
| 2014-07-10 | 5806-032-0840 | ND |
| 2014-07-10 | 5806-034-0800 | ND |
| 2014-07-10 | 5806-035-0940 | ND |
| 2015-01-07 | 5806-900-1140 | ND |
| 2015-01-07 | 5806-901-1130 | ND |
| 2015-01-07 | 5806-902-1155 | 1.30 ppb |
| 2015-01-07 | 5806-903-1205 | 0.520 ppb |
| 2015-07-09 | 5806-900-1226 | 0.510 ppb |
| 2015-07-09 | 5806-901-1235 | ND |
| 2015-07-09 | 5806-902-1216 | 1.10 ppb |
| 2015-07-09 | 5806-903-1245 | ND |
| 2015-10-06 | 5806-900-1140 | 0.500 ppb |
| 2015-10-06 | 5806-901-1100 | ND |
| 2015-10-06 | 5806-902-1150 | 0.870 ppb |
| 2015-10-06 | 5806-903-1200 | ND |
| 2016-01-08 | 5806-900-1010 | ND |
| 2016-01-08 | 5806-901-1000 | ND |
| 2016-01-08 | 5806-902-1015 | 1.30 ppb |
| 2016-01-08 | 5806-903-1040 | ND |
| 2016-04-05 | 5806-900-1030 | 1.10 ppb |
| 2016-04-05 | 5806-901-1040 | ND |
| 2016-04-05 | 5806-902-1010 | 1.20 ppb |
| 2016-04-05 | 5806-903-1055 | ND |
| 2016-07-07 | 5806-900-0800 | 0.830 ppb |
| 2016-07-07 | 5806-901-0810 | ND |
| 2016-07-07 | 5806-902-0730 | 0.900 ppb |
| 2016-07-07 | 5806-903-0845 | ND |
| 2016-07-12 | 5806-022-1235 | ND |
| 2016-07-12 | 5806-023-1320 | ND |
| 2016-07-12 | 5806-027-0810 | ND |
| 2016-07-12 | 5806-028-0945 | ND |
| 2016-07-12 | 5806-038-0925 | ND |
| 2016-07-12 | 5806-039-0848 | ND |
| 2016-07-12 | 5806-040-0855 | ND |
| 2016-10-05 | 5806-900-1030 | ND |
| 2016-10-05 | 5806-901-1040 | ND |
| 2016-10-05 | 5806-902-1020 | 1.10 ppb |
| 2016-10-05 | 5806-903-1005 | ND |
| 2016-11-15 | 5806-027-0950 | ND |
| 2017-01-17 | 5806-900-0800 | 0.530 ppb |
| 2017-01-17 | 5806-901-0748 | 0.520 ppb |
| 2017-01-17 | 5806-902-0745 | 1.10 ppb |
| 2017-01-17 | 5806-903-0805 | ND |
| 2017-05-25 | 5806-900-0935 | ND |
| 2017-05-25 | 5806-901-0945 | 0.570 ppb |
| 2017-05-25 | 5806-902-0845 | 0.910 ppb |
| 2017-05-25 | 5806-903-0910 | 0.520 ppb |
| 2017-07-19 | 5806-900-1355 | ND |
| 2017-07-19 | 5806-901-1405 | 0.690 ppb |
| 2017-07-19 | 5806-902-1340 | 0.880 ppb |
| 2017-07-19 | 5806-903-1425 | 0.550 ppb |
| 2017-07-20 | 5806-014-1245 | ND |
| 2017-07-20 | 5806-016-0910 | ND |
| 2017-07-20 | 5806-032-0720 | ND |
| 2017-07-20 | 5806-034-1110 | ND |
| 2017-07-20 | 5806-035-1040 | ND |
| 2017-07-20 | 5806-038-0830 | ND |
| 2017-07-20 | 5806-039-0940 | ND |
| 2017-07-20 | 5806-040-0930 | ND |
| 2017-10-10 | 5806-900-1130 | ND |
| 2017-10-10 | 5806-901-1122 | ND |
| 2017-10-10 | 5806-902-1200 | 0.950 ppb |
| 2017-10-10 | 5806-903-1210 | 0.510 ppb |
| 2018-07-09 | 5806-900-1130 | ND |
| 2018-07-09 | 5806-901-1150 | ND |
| 2018-07-09 | 5806-902-1120 | 1.80 ppb |
| 2018-07-09 | 5806-903-1105 | 0.590 ppb |
| 2018-10-01 | 5806-900-0900 | ND |
| 2018-10-01 | 5806-901-1030 | ND |
| 2018-10-01 | 5806-902-0810 | 1.40 ppb |
| 2018-10-01 | 5806-903-1040 | 1.000 ppb |
| 2019-01-07 | 5806-900-0925 | ND |
| 2019-01-07 | 5806-901-1110 | ND |
| 2019-01-07 | 5806-902-0815 | 0.950 ppb |
| 2019-01-07 | 5806-903-1100 | ND |
| 2019-04-09 | 5806-900-1105 | 0.560 ppb |
| 2019-04-09 | 5806-901-1120 | 1.20 ppb |
| 2019-04-09 | 5806-902-1330 | 0.760 ppb |
| 2019-04-09 | 5806-903-1415 | 0.620 ppb |
| 2019-07-08 | 5806-900-0850 | ND |
| 2019-07-08 | 5806-901-0900 | ND |
| 2019-07-08 | 5806-902-0755 | 1.30 ppb |
| 2019-07-08 | 5806-903-1055 | 0.560 ppb |
| 2019-07-09 | 5806-022-1125 | ND |
| 2019-07-09 | 5806-023-1015 | ND |
| 2019-07-09 | 5806-028-0915 | ND |
| 2019-08-19 | 5806-039-1415 | ND |
| 2019-08-19 | 5806-040-1420 | ND |
| 2019-10-07 | 5806-900-0805 | ND |
| 2019-10-07 | 5806-901-0815 | ND |
| 2019-10-07 | 5806-902-0745 | 0.840 ppb |
| 2019-10-07 | 5806-903-1110 | 0.500 ppb |
| 2019-10-08 | 5806-027-0930 | ND |