The Power of Information

National Drinking Water Database


Benzo[a]pyrene in Illinois


Benzo[a]pyrene is a polycyclic aromatic hydrocarbon that contaminates drinking water from leaching coal tar coatings on water distribution pipes and storage liners; it is also a product of combustion. [read more]

The Most Polluted Communities in Illinois

48 water utilities reported detecting Benzo[a]pyrene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Benzo[a]pyrene level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1IL American-Valley View
Creve Coeur, IL
8,8691 of 40.05 ppb
(0 to 0.2 ppb)
2Shabbona
Shabbona, IL
9501 of 60.04 ppb
(0 to 0.23 ppb)
3Mason City
Mason City, IL
2,5581 of 10.03 ppb
(0.03 ppb)
4Bradley Heights Subdivision
Rockford, IL
1921 of 20.02 ppb
(0 to 0.05 ppb)
5Hoffman Estates
Hoffman Estates, IL
52,5202 of 50.01 ppb
(0 to 0.03 ppb)
6Allendale
Allendale, IL
5281 of 50.01 ppb
(0 to 0.06 ppb)
7Broadview Academy
Elburn, IL
851 of 5< 0.01 ppb
(0 to 0.05 ppb)
8Aurora
Aurora, IL
171,0002 of 12< 0.01 ppb
(0 to 0.07 ppb)
9Ashmore
Ashmore, IL
8001 of 5< 0.01 ppb
(0 to 0.04 ppb)
10Braidwood
Braidwood, IL
6,6001 of 5< 0.01 ppb
(0 to 0.04 ppb)

Health Based Limits for Benzo[a]pyrene

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
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
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.<0.01 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.<0.01 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.0.2 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.0.5 ppb

Violation Summary for Benzo[a]pyrene in Illinois

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Illinois since 2004

Violation TypeNumber of Violations
Failure to monitor regularly28