Alpha-hexachlorocyclohexane
Yorktown Consoldated Water District #1
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.
6
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 | 0.00380 ppb | 5 | 1 | ND - 0.0190 ppb |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-06-05 | 7054370005SEA2 | ND |
| 2018-06-13 | 7055154002SEA1 | 0.0190 ppb |
| 2018-09-06 | 7064095006SEA3 | ND |
| 2018-09-07 | 7064095005SEA3 | ND |
| 2018-12-27 | 7075153001SEA4 | ND |
| 2019-01-17 | 7077084001SEA4 | ND |