alpha-hexachlorocyclohexane is a chemical contaminant that has a reference level of 0.006 µg/L.
| Riverhead Water District | .16 µg/L (on 11/19/2020) | NY |
|---|---|---|
| Paducah Waterworks | .067 µg/L (on 1/22/2018) | KY |
| City of Cleburne | .031 µg/L (on 1/29/2019) | TX |
| Parker WSD | .022 µg/L (on 4/16/2019) | CO |
| City of West Point | .022 µg/L (on 10/2/2018) | MS |
| Yorktown Consolidated Water Dist. #1 | .019 µg/L (on 6/13/2018) | NY |
| Rowan Water, Inc. | .0178 µg/L (on 11/7/2018) | KY |
| City of Sunnyvale | .016 µg/L (on 12/18/2018) | CA |
| Borden Tri-County Region | .016 µg/L (on 4/16/2019) | IN |
| Bellevue Waterworks | .016 µg/L (on 4/15/2020) | WI |
| Henry County Water & Sewer Authority | .015 µg/L (on 5/8/2019) | GA |
| City of Waxahachie | .015 µg/L (on 1/10/2019) | TX |
| JBLM Lewis | .015 µg/L (on 1/11/2021) | WA |
| City of Mabank | .014 µg/L (on 1/10/2019) | TX |
| City of Eustis | .013 µg/L (on 1/7/2019) | FL |
| Brockton Water Commission | .013 µg/L (on 9/12/2018) | MA |
| Palm Coast Utility | .012 µg/L (on 3/12/2019) | FL |
| Green Acres WA - South | .012 µg/L (on 7/17/2019) | MS |
| Cliffdale West | .011 µg/L (on 3/18/2019) | NC |
| LCF Water District | .011 µg/L (on 3/12/2019) | SC |
| El Paso County WCID #4 | .011 µg/L (on 6/11/2019) | TX |
| Quantico Marine Base - Mainside | .011 µg/L (on 7/25/2018) | VA |
| Allen County Water District | .0104 µg/L (on 10/31/2019) | KY |
| Vineland Water & Sewer Utility | .01 µg/L (on 6/18/2018) | NJ |
| Kearny Water Department | .01 µg/L (on 5/9/2019) | NJ |