Bromochloromethane
Helena Water System
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.
23
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 |
|---|---|---|---|---|
| 2013 | ND | 5 | 0 | ND |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2013-07-08 | 729689-9301 | ND |
| 2013-07-08 | 729691-9301 | ND |
| 2013-07-08 | 729681-9301 | ND |
| 2013-10-02 | 750326-9933 | ND |
| 2013-10-02 | 750328-9933 | ND |
| 2014-01-16 | 766872-10584 | ND |
| 2014-01-16 | 766870-10584 | ND |
| 2014-04-16 | 781014-11187 | ND |
| 2014-04-16 | 781016-11187 | ND |
| 2014-05-27 | H14050436-002A | ND |
| 2014-05-27 | H14050436-001A | ND |
| 2015-05-21 | H15050321-003A | ND |
| 2015-05-21 | H15050321-002A | ND |
| 2015-05-21 | H15050321-001A | ND |
| 2016-05-10 | H16050166-002A | ND |
| 2016-05-10 | H16050166-001A | ND |
| 2017-05-25 | H17050520-002A | ND |
| 2017-05-25 | H17050520-001A | ND |
| 2018-05-29 | H18050689-002A | ND |
| 2018-05-29 | H18050689-001A | ND |
| 2018-05-30 | H18050718-001A | ND |
| 2019-07-12 | H19070266-001A | ND |
| 2019-07-12 | H19070266-002A | ND |