Alpha-hexachlorocyclohexane
City of Mountlake Terrace
NOTE: City of Mountlake Terrace purchases water from Alderwood Water District which is required to test for alpha-hexachlorocyclohexane. Sample information shown below was taken by Alderwood Water District.
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.
4
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 | N/A | 0 | 0 | N/A |
| 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 | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
All test results
NOTE: City of Mountlake Terrace purchases water from Alderwood Water District which is required to test for alpha-hexachlorocyclohexane. Sample information shown below was taken by Alderwood Water District.
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-06 | 18-04154-8572 | ND |
| 2018-05-08 | 18-16312-33499 | ND |
| 2018-08-08 | 18-29762-60144 | ND |
| 2018-11-07 | 18-42196-85856 | ND |