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National Drinking Water Database

National Drinking Water Database - Chemical Contaminants


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Dibenz[a,h]anthracene a polycyclic aromatic hydrocarbon (PAH) released from the incomplete combustion of fossil fuels.

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Dibenz[a,h]anthracene Exposure by State

Water utilities in 3 states have reported detecting Dibenz[a,h]anthracene in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Dibenz[a,h]anthracene contaminationWater suppliers reporting Dibenz[a,h]anthracene above health-based limits
Rhode Island151,000151,000

The Most Polluted Communities

12 water utilities reported detecting Dibenz[a,h]anthracene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dibenz[a,h]anthracene level

RankSystem Population Served Positive test results of total reported tests Average Level
1Kimzey Regional Water District
Malvern, AR
7,4271 of 40.06 ppb
(0 to 0.25 ppb)
2Weiner Waterworks
Weiner, AR
9151 of 20.04 ppb
(0 to 0.08 ppb)
3Grady Waterworks
Grady, AR
3971 of 50.02 ppb
(0 to 0.09 ppb)
4Bristol County Water Authority
Warren, RI
51,0002 of 110.02 ppb
(0 to 0.14 ppb)
5Trumann Rural Water Assoc
Trumann, AR
2,6451 of 60.01 ppb
(0 to 0.08 ppb)
6Central Arkansas Water
Little Rock, AR
323,2121 of 60.01 ppb
(0 to 0.08 ppb)
7Huttig Waterworks
Huttig, AR
9001 of 12< 0.01 ppb
(0 to 0.08 ppb)
8Yorktown Water Association
Yorktown, AR
7,9561 of 18< 0.01 ppb
(0 to 0.1 ppb)
9Hughes Community Water Assoc
Hughes, AR
2,4831 of 5< 0.01 ppb
(0 to 0.03 ppb)
10Star City Water Company
Star City, AR
2,7901 of 15< 0.01 ppb
(0 to 0.08 ppb)

Health Based Limits for Dibenz[a,h]anthracene

EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.<0.01 ppb

Testing Summary for Dibenz[a,h]anthracene

Are tests routinely required for Dibenz[a,h]anthracene by federal law?No
Water suppliers reporting tests for Dibenz[a,h]anthracene (2004-2009):2,572 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.4 per year