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EWG's Tap Water Database — 2021 UPDATE

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Alpha-hexachlorocyclohexane

Status: No national drinking water standard exists

 

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.

2018-2021:

FOUND

16

states detected

43

utilities detected

1.2 million

people served

States reporting alpha-hexachlorocyclohexane in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Georgia3232,472
California1147,055
Florida4121,423
Kentucky6115,243
Massachusetts3111,392
New York5106,319
Texas794,466
New Jersey277,914
Colorado152,175
Washington120,888
South Carolina116,971
Indiana216,068
Mississippi315,619
North Carolina115,463
Wisconsin115,365
Virginia215,195
MORE
LESS

Filtering technologies that reduce alpha-hexachlorocyclohexane

Activated Carbon

Reverse Osmosis

Utilities with the highest amounts of alpha-hexachlorocyclohexane, 2018-2021

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
West Mccracken County Water DistrictWest Paducah, KY1 of 40.0168 ppb4,410
Paducah Water Works*Paducah, KY1 of 40.0168 ppb64,013
Green Acres W/a-southMarks, MS1 of 10.0120 ppb351
Golden Triangle W/a #2Mayhew, MS1 of 20.0110 ppb206
City of West Point*West Point, MS1 of 20.0110 ppb15,062
City of CleburneCleburne, TX1 of 40.00775 ppb30,573
Riverhead WD*Riverhead, NY1 of 230.00696 ppb35,000
Riverside Water DistrictHauppauge, NY1 of 230.00696 ppb2,050
El Paso County Water Control and Improvement District 4 FabensFabens, TX1 of 20.00550 ppb8,100
Rowan Water Inc*Morehead, KY1 of 40.00445 ppb18,765
Bellevue WaterworksGreen Bay, WI1 of 40.00400 ppb15,365
City of Mabank*Mabank, TX1 of 40.00350 ppb11,349
Country Club Water Supply CorporationMabank, TX1 of 40.00350 ppb924
Windsor Farms Water DistrictSomers, NY1 of 60.00317 ppb150
Yorktown Consoldated Water District #1*Yorktown Heights, NY1 of 60.00317 ppb68,719
Amawalk Heights Water DistrictSomers, NY1 of 60.00317 ppb400
LCF Water DistrictChesnee, SC1 of 40.00275 ppb16,971
Borden Tri-County Region*Borden, IN1 of 60.00267 ppb10,220
East Newark Water DepartmentEast Newark, NJ1 of 40.00250 ppb2,406
Kearny Water Department*Orange, NJ1 of 40.00250 ppb41,664
Palm Coast Utility*Palm Coast, FL1 of 60.00200 ppb80,325
City of Waxahachie*Waxahachie, TX1 of 80.00188 ppb36,422
Allen County Water District*Scottsville, KY1 of 60.00173 ppb14,999
Whitman Water System*Whitman, MA1 of 80.00163 ppb14,574
Brockton Water Commission*Brockton, MA1 of 80.00163 ppb93,810
City of EustisEustis, FL1 of 80.00163 ppb35,089
Quantico Marine Base-Mainside*Quantico, VA1 of 80.00138 ppb14,525
Quantico, Town OfQuantico, VA1 of 80.00138 ppb670
Henry County Water & Sewer Authority*Jackson, GA1 of 120.00125 ppb218,667
Parker WSD*Parker, CO1 of 180.00122 ppb52,175
JBLM LewisJoint Base Lewis-mccord, WA1 of 140.00107 ppb20,888
City of SunnyvaleSunnyvale, CA1 of 200.000800 ppb147,055
Vineland Water & Sewer UtilityVineland, NJ1 of 210.000476 ppb36,250
Cliffdale WestHampstead, NC1 of 560.000196 ppb15,463

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Alpha-hexachlorocyclohexane, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Paducah Water Works*Paducah, KY1 of 40.0168 ppb64,013
City of West Point*West Point, MS1 of 20.0110 ppb15,062
City of CleburneCleburne, TX1 of 40.00775 ppb30,573
Riverhead WD*Riverhead, NY1 of 230.00696 ppb35,000
Rowan Water Inc*Morehead, KY1 of 40.00445 ppb18,765
Bellevue WaterworksGreen Bay, WI1 of 40.00400 ppb15,365
City of Mabank*Mabank, TX1 of 40.00350 ppb11,349
Yorktown Consoldated Water District #1*Yorktown Heights, NY1 of 60.00317 ppb68,719
LCF Water DistrictChesnee, SC1 of 40.00275 ppb16,971
Borden Tri-County Region*Borden, IN1 of 60.00267 ppb10,220
Kearny Water Department*Orange, NJ1 of 40.00250 ppb41,664
Palm Coast Utility*Palm Coast, FL1 of 60.00200 ppb80,325
City of Waxahachie*Waxahachie, TX1 of 80.00188 ppb36,422
Allen County Water District*Scottsville, KY1 of 60.00173 ppb14,999
Brockton Water Commission*Brockton, MA1 of 80.00163 ppb93,810
Whitman Water System*Whitman, MA1 of 80.00163 ppb14,574
City of EustisEustis, FL1 of 80.00163 ppb35,089
Quantico Marine Base-Mainside*Quantico, VA1 of 80.00138 ppb14,525
Henry County Water & Sewer Authority*Jackson, GA1 of 120.00125 ppb218,667
Parker WSD*Parker, CO1 of 180.00122 ppb52,175
JBLM LewisJoint Base Lewis-mccord, WA1 of 140.00107 ppb20,888
City of SunnyvaleSunnyvale, CA1 of 200.000800 ppb147,055
Vineland Water & Sewer UtilityVineland, NJ1 of 210.000476 ppb36,250
Cliffdale WestHampstead, NC1 of 560.000196 ppb15,463

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Alpha-hexachlorocyclohexane, but it likely has the contaminant in its water supply.