Bromochloromethane
Derry Water Department
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for bromochloromethane. Sample information shown below was taken by Manchester Water Works.
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.
12
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 7 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for bromochloromethane. Sample information shown below was taken by Manchester Water Works.
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-17 | 1402-00336-001 | ND |
| 2014-03-26 | 201403270197AM | ND |
| 2014-05-14 | 1405-00442-001 | ND |
| 2014-06-18 | 201406190252AM | ND |
| 2014-08-04 | 1408-00056-001 | ND |
| 2014-09-09 | 201409100994AM | ND |
| 2014-12-16 | 201412170480AM | ND |
| 2015-08-17 | 1508-01335-002 | ND |
| 2016-08-11 | 1608-01474-001 | ND |
| 2017-08-16 | 1708-02233-001 | ND |
| 2018-09-10 | 1810-02544-001 | ND |
| 2019-08-13 | 1908-01819-001 | ND |