Alpha-hexachlorocyclohexane
Derry Water Department
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for alpha-hexachlorocyclohexane. Sample information shown below was taken by Manchester Water Works.
Alpha-HCH is a byproduct of the production of the insecticide lindane, which is no longer used in the U.S. The International Agency for Research on Cancer has classified all forms of this chemical as possibly carcinogenic to humans.
3
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for alpha-hexachlorocyclohexane. Sample information shown below was taken by Manchester Water Works.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-17 | U8A0012-01 | ND |
| 2018-08-06 | U8H0049-01 | ND |
| 2018-10-17 | U8J0021-01 | ND |