Bromochloromethane
Chelsea Water Department (MWRA)
NOTE: Chelsea Water Department (MWRA) purchases water from Massachusetts Water Resources Authority (MWRA) which is required to test for bromochloromethane. Sample information shown below was taken by Massachusetts Water Resources Authority (MWRA).
Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 4 | 0 | ND |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
NOTE: Chelsea Water Department (MWRA) purchases water from Massachusetts Water Resources Authority (MWRA) which is required to test for bromochloromethane. Sample information shown below was taken by Massachusetts Water Resources Authority (MWRA).
| Date | Result |
|---|---|
| 2014-10-06 | ND |
| 2014-10-07 | ND |
| 2015-10-20 | ND |
| 2015-10-20 | ND |
| 2016-10-18 | ND |
| 2016-10-18 | ND |
| 2017-10-17 | ND |
| 2017-10-17 | ND |
| 2018-10-16 | ND |
| 2018-10-16 | ND |
| 2019-10-15 | ND |
| 2019-10-15 | ND |