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Heptachlor epoxide

Status: National drinking water standard exists

 

Heptachlor epoxide is a breakdown product of heptachlor, a highly toxic and carcinogenic pesticide banned in the U.S. since the 1980s.

2015:

FOUND
FOUND ABOVE HEALTH GUIDELINES

6

states detected

38

utilities detected

844,000

people served

5

states over health guideline

32

utilities over health guideline

85,393

people served over health guideline

Health concerns for heptachlor epoxide

Cancer

Hormone disruption

Harm to the liver

State and national drinking water standards and health guidelines

Health Guideline 0.006 ppb

The health guideline of 0.006 ppb for heptachlor epoxide was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 0.2 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting heptachlor epoxide in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
Hawaii004757,536
New York134,000134,000
Florida626,442726,712
North Carolina2222,6522323,431
Texas11,86911,869
Maryland24302430
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Utilities with the highest amounts of heptachlor epoxide, 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Aloha Gardens UtilitiesNew Port Richey, FL2 of 20.135 ppb8,136
Ashebrook ParkGastonia, NC4 of 40.108 ppb239
Oak Hill EstatesPomfret, MD1 of 10.1000 ppb180
Westwood S/dHoliday, FL3 of 30.0897 ppb344
Oak Run EstatesOcala, FL1 of 10.0710 ppb11,788
Amber AcresKnightdale, NC1 of 10.0530 ppb239
Winningfield S/dDallas, NC1 of 10.0490 ppb28
Cedar Village IIChapel Hill, NC2 of 20.0480 ppb28
Rolling Acres S/dRaleigh, NC3 of 30.0427 ppb58
Royal Acres S/dRaleigh, NC2 of 40.0400 ppb63
Emerald Village S/dRaleigh, NC1 of 10.0360 ppb121
Orangewood Water System*Holiday, FL3 of 30.0350 ppb5,937
Eden Mobile Home ParkFruitland, MD1 of 30.0333 ppb250
Dalewood-monteray Water SystemGastonia, NC1 of 20.0305 ppb142
Edgewood Mobile Home ParkOcala, FL1 of 20.0290 ppb42
Helms Water SystemStanley, NC2 of 20.0285 ppb94
Quail Ridge S/d*Gastonia, NC1 of 10.0280 ppb142
Country Acres/southgateGastonia, NC2 of 20.0270 ppb668
Camelot S/dGarner, NC3 of 70.0258 ppb604
Port Washington WD38 Sqndy Hollow Rd, NY5 of 80.0251 ppb34,000
Mountainbrook S/dGastonia, NC1 of 10.0230 ppb152
Mcconnell S/dDallas, NC1 of 10.0220 ppb124
Snow Creek Heights Water SystemHickory, NC2 of 30.0197 ppb130
River Meadows S/dLincolnton, NC1 of 30.0193 ppb119
Braxton Hills/simmons HeightsFayetteville, NC1 of 20.0189 ppb523
Berkshire DownsRaleigh, NC2 of 50.0159 ppb267
City of TroupTroup, TX1 of 20.0150 ppb1,869
Middlesex Water SystemMiddlesex, NC1 of 30.0127 ppb850
Brookwood Comm. Water System*Fayetteville, NC2 of 70.0107 ppb15,665
Blue Skies EstatesOcala, FL1 of 20.00950 ppb195

* 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 Heptachlor epoxide, but it likely has the contaminant in its water supply.

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LESS
UtilityLocationTestsAverage levelPeople served
Oak Run EstatesOcala, FL1 of 10.0710 ppb11,788
Port Washington WD38 Sqndy Hollow Rd, NY5 of 80.0251 ppb34,000
Brookwood Comm. Water System*Fayetteville, NC2 of 70.0107 ppb15,665
Honolulu-Windward-Pearl Harbor*Honolulu, HI3 of 260.00123 ppb676,358

* 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 Heptachlor epoxide, but it likely has the contaminant in its water supply.