Dibromochloromethane
Fredonia Village
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.
92
Samples
0
Samples exceeding legal limit (MCL)
87
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 | 5.67 ppb | 12 | 8 | ND - 10.00 ppb |
| 2015 | 5.58 ppb | 16 | 16 | 3.00 ppb - 8.60 ppb |
| 2016 | 5.77 ppb | 16 | 16 | 2.00 ppb - 10.00 ppb |
| 2017 | 5.19 ppb | 16 | 16 | 3.00 ppb - 8.70 ppb |
| 2018 | 0.349 ppb | 16 | 15 | ND - 0.840 ppb |
| 2019 | 0.479 ppb | 16 | 16 | 0.260 ppb - 0.950 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 |
|---|---|---|
| 2014-05-29 | MAY2014 278 CHES | ND |
| 2014-05-29 | MAY2014 176 EAGL | ND |
| 2014-05-29 | MAY2014 33 TEMPL | ND |
| 2014-05-29 | MAY2014 GREGORY | ND |
| 2014-08-26 | AUG14 151CHESTNU | 10.00 ppb |
| 2014-08-26 | 33 TEMPLE AUG 20 | 7.70 ppb |
| 2014-08-26 | AUG2014 GREGORY | 7.80 ppb |
| 2014-08-26 | AUG2014 176 EAGL | 10.00 ppb |
| 2014-11-05 | NOV14 33 TEMPLE | 5.90 ppb |
| 2014-11-24 | NOV14 176 EAGLE | 8.80 ppb |
| 2014-11-24 | NOV14 GREGORY HA | 8.60 ppb |
| 2014-11-24 | NOV14 278 CHESTN | 9.20 ppb |
| 2015-02-19 | FEB 15 278 CHEST | 4.40 ppb |
| 2015-02-19 | FEB15 176 EAGLE | 5.40 ppb |
| 2015-02-19 | FEB 15 GREGORY H | 3.00 ppb |
| 2015-02-19 | FEB15 33 TEMPLE | 3.20 ppb |
| 2015-05-14 | MAY2015 EAGLE | 6.40 ppb |
| 2015-05-14 | MAY2015 GREGORY | 5.90 ppb |
| 2015-05-14 | MAY2015 TEMPLE | 4.80 ppb |
| 2015-05-14 | MAY2015 278 CHES | 5.70 ppb |
| 2015-08-13 | AUG15 278 CHESTN | 5.60 ppb |
| 2015-08-13 | AUG15 176 EAGLE | 5.90 ppb |
| 2015-08-13 | AUG15 33 TEMPLE | 4.80 ppb |
| 2015-08-13 | AUG15 GREGORY HA | 5.30 ppb |
| 2015-11-20 | NOV15 EAGLE | 8.60 ppb |
| 2015-11-20 | NOV15 278 CHESTN | 4.40 ppb |
| 2015-11-21 | NOV15 33 TEMPLE | 8.00 ppb |
| 2015-11-22 | NOV15 GREGORY HA | 7.90 ppb |
| 2016-02-29 | FEB16 33 TEMPLE | 3.40 ppb |
| 2016-02-29 | FEB2016 278 CHES | 2.00 ppb |
| 2016-02-29 | FEB16 176 EAGLE | 4.40 ppb |
| 2016-02-29 | FEB2016 GREGORY | 3.00 ppb |
| 2016-05-25 | 2NDQT16 176 EAGL | 6.70 ppb |
| 2016-05-25 | 2NDQT16 33 TEMPL | 6.00 ppb |
| 2016-05-25 | 2NDQT16 GREGORY | 5.20 ppb |
| 2016-05-25 | 2NDQT16 278 CHES | 3.10 ppb |
| 2016-08-25 | AUG16 GREGORY HA | 9.40 ppb |
| 2016-08-25 | AUG16 33 TEMPLE | 8.70 ppb |
| 2016-08-29 | AUG16 176 EAGLE | 10.00 ppb |
| 2016-08-29 | AUG16 278 CHESTN | 5.90 ppb |
| 2016-11-18 | NOV16 33 TEMPLE | 6.90 ppb |
| 2016-11-18 | NOV16 GREGORY HA | 5.90 ppb |
| 2016-11-18 | NOV16 278 CHESTN | 4.10 ppb |
| 2016-11-18 | NOV16 176 EAGLE | 7.60 ppb |
| 2017-02-21 | FEB17 278 CHESTN | 3.80 ppb |
| 2017-02-21 | FEB17 176 EAGLE | 3.70 ppb |
| 2017-02-21 | FEB17 33 TEMPLE | 3.60 ppb |
| 2017-02-21 | FEB17 GREGORY HA | 3.00 ppb |
| 2017-05-16 | MAY17 GREGORY HA | 4.70 ppb |
| 2017-05-16 | MAY17 EAGLE | 4.40 ppb |
| 2017-05-16 | MAY17 CHESTNUT | 5.00 ppb |
| 2017-05-16 | MAY17 TEMPLE | 4.70 ppb |
| 2017-08-08 | 17AUG 33 TEMPLE | 8.60 ppb |
| 2017-08-08 | AUG17 GREGORY HA | 8.20 ppb |
| 2017-08-09 | AUG17 EAGLE STRE | 8.50 ppb |
| 2017-08-09 | AUG17 CHESTNUT S | 8.70 ppb |
| 2017-11-29 | NOV17 33 TEMPLE | 3.90 ppb |
| 2017-11-29 | NOV17 GREGORY HA | 3.50 ppb |
| 2017-11-29 | NOV17 CHESTNUT | 3.50 ppb |
| 2017-11-29 | NOV17 EAGLE | 5.20 ppb |
| 2018-02-28 | Q1FREDONIA 18 TE | 0.210 ppb |
| 2018-02-28 | Q1FREDONIA 18 EA | 0.260 ppb |
| 2018-02-28 | Q1FREDONIA 18 CH | 0.150 ppb |
| 2018-02-28 | Q1FREDONIA 18 GR | 0.290 ppb |
| 2018-05-08 | Q2FREDONIA 18 CH | 0.260 ppb |
| 2018-05-09 | Q2FREDONIA 18 TE | ND |
| 2018-05-09 | Q2FREDONIA 18 EA | 0.350 ppb |
| 2018-05-09 | Q2FREDONIA 18 GR | 0.230 ppb |
| 2018-08-08 | Q3FREDONIA 18 CH | 0.640 ppb |
| 2018-08-08 | Q318FREDONIA 33 | 0.630 ppb |
| 2018-08-08 | Q318FREDONIA 176 | 0.840 ppb |
| 2018-08-08 | Q318FREDONIA GRE | 0.770 ppb |
| 2018-11-13 | Q418FREDONIA GRE | 0.240 ppb |
| 2018-11-13 | Q418FREDONIA 176 | 0.220 ppb |
| 2018-11-13 | Q418FREDONIA 33 | 0.260 ppb |
| 2018-11-13 | Q418 FREDONIA CH | 0.240 ppb |
| 2019-02-26 | Q119FREDONIA 33 | 0.270 ppb |
| 2019-02-26 | Q119FREDONIA GRE | 0.260 ppb |
| 2019-02-26 | Q119 FREDONIA CH | 0.280 ppb |
| 2019-02-26 | Q119FREDONIA 176 | 0.400 ppb |
| 2019-05-14 | Q219 FREDONIA CH | 0.380 ppb |
| 2019-05-14 | Q219FREDONIA 33 | 0.410 ppb |
| 2019-05-14 | Q219FREDONIA GRE | 0.460 ppb |
| 2019-05-14 | Q219FREDONIA 176 | 0.410 ppb |
| 2019-08-13 | Q319FREDONIA 176 | 0.760 ppb |
| 2019-08-13 | Q319FREDONIA GRE | 0.880 ppb |
| 2019-08-13 | Q319FREDONIA CHE | 0.950 ppb |
| 2019-08-13 | Q319FREDONIA 33 | 0.780 ppb |
| 2019-11-20 | Q419FREDONIA 33 | 0.310 ppb |
| 2019-11-20 | Q419FREDONIA 176 | 0.410 ppb |
| 2019-11-20 | Q419FREDONIA CHE | 0.310 ppb |
| 2019-11-20 | Q419FREDONIA GRE | 0.390 ppb |