Bromodichloromethane
Chautauqua Utility District
Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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 | 14.3 ppb | 6 | 6 | 10.3 ppb - 20.7 ppb |
| 2015 | 13.0 ppb | 6 | 6 | 8.75 ppb - 19.0 ppb |
| 2016 | 12.2 ppb | 8 | 8 | 7.90 ppb - 15.0 ppb |
| 2017 | 11.7 ppb | 8 | 8 | 9.30 ppb - 13.5 ppb |
| 2018 | 9.61 ppb | 8 | 8 | 2.70 ppb - 12.0 ppb |
| 2019 | 10.9 ppb | 8 | 8 | 8.70 ppb - 13.4 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 |
|---|---|---|
| 2014-05-15 | MAY2014 WWTP | 11.8 ppb |
| 2014-05-15 | MAY2014 TURNER B | 10.3 ppb |
| 2014-08-14 | AUG 2014 TURNER | 20.7 ppb |
| 2014-08-14 | AUG 2014 WWTP | 17.8 ppb |
| 2014-11-06 | NOV14 TURNER-CUD | 12.1 ppb |
| 2014-11-06 | NOV14 CUD WWTP | 12.9 ppb |
| 2015-02-19 | FEB2015 TURNER B | 9.36 ppb |
| 2015-02-19 | FEB15 WWTP-CUD | 8.75 ppb |
| 2015-05-28 | MAY2015 TURNER B | 11.2 ppb |
| 2015-05-28 | MAY 2015 WWTP DB | 11.1 ppb |
| 2015-08-20 | AUG15 CUD WWTP | 18.7 ppb |
| 2015-08-20 | AUG15CUD TURNER | 19.0 ppb |
| 2016-02-24 | FEB16 CUD-TURNER | 11.0 ppb |
| 2016-02-24 | FEB15 CUD-WWTP | 7.90 ppb |
| 2016-05-18 | MAY2016 TURNER B | 11.0 ppb |
| 2016-05-18 | MAY16 WWTP CUD | 12.0 ppb |
| 2016-08-03 | AUG16 TURNER BLD | 14.0 ppb |
| 2016-08-03 | AUG16 WASTEWATER | 13.0 ppb |
| 2016-11-16 | NOV16 WWTP | 15.0 ppb |
| 2016-11-16 | NOV16 TURNER BLD | 14.0 ppb |
| 2017-02-15 | FEB2017 TURNER C | 11.1 ppb |
| 2017-02-15 | FEB17 WWTP CUD | 11.9 ppb |
| 2017-05-03 | MAY17 DBPS CUD | 12.0 ppb |
| 2017-05-03 | MAY17 DBPS CUD # | 12.3 ppb |
| 2017-08-02 | 3RDQT17 WWTP | 13.5 ppb |
| 2017-08-02 | 3RDQT17 TURNER B | 12.0 ppb |
| 2017-11-15 | NOV17 DBP TURNER | 9.30 ppb |
| 2017-11-15 | NOV17 WASTERWATE | 11.3 ppb |
| 2018-02-07 | Q1 CUD 18 WWTP | 2.70 ppb |
| 2018-02-07 | Q1CUD 18 TURNER | 11.0 ppb |
| 2018-05-02 | Q2 CUD 18 WWTP | 9.40 ppb |
| 2018-05-02 | Q2 CUD 18 TURNER | 9.90 ppb |
| 2018-08-01 | Q3 CUD 18 WWTP | 12.0 ppb |
| 2018-08-01 | Q3 CUD 18 TURNER | 12.0 ppb |
| 2018-11-20 | Q4 18 WWTP DBPS | 9.90 ppb |
| 2018-11-20 | Q4 18 TURNER DBP | 10.00 ppb |
| 2019-02-20 | Q1 19 TURNER DBP | 9.10 ppb |
| 2019-02-20 | Q1 19 WWTP DBPS | 8.70 ppb |
| 2019-05-01 | Q2 19 TURNER DBP | 9.90 ppb |
| 2019-05-01 | Q2 19 WWTP DBPS | 10.00 ppb |
| 2019-08-07 | Q3 19 TURNER DBP | 13.4 ppb |
| 2019-08-07 | Q3 19 WWTP DBPS | 12.4 ppb |
| 2019-11-06 | Q4 19 TURNER DBP | 11.6 ppb |
| 2019-11-06 | Q4 19 WWTP DBPS | 11.9 ppb |