Related by context. Frequent words. (Click for all words.) 48 IDEM 46 Paducah 45 Rocky Flats 45 hexavalent chromium 44 groundwater contamination 44 air pollution 44 NIOSH 43 Owensboro 43 Chemical Safety 43 PFOA 43 DEQ 43 Louisville 43 chemical 42 Doe Run 42 sulfur dioxide 42 Erlanger 42 pollution 42 DuPont 42 EPA 42 Bardstown 42 TCEQ 41 Superfund site 41 pollutants 41 Motiva 41 contaminated groundwater 41 Environmental Protection Agency 41 coal ash 41 Clean Air 41 sulfur dioxide emissions 41 MSHA 41 toxic chemicals 41 hazardous chemicals 40 ADEM 40 diesel exhaust 40 Clairton 40 Environmental Quality 40 Kanawha Valley 40 OSHA 40 gases 39 AK Steel 39 Kanawha County 39 Clarksville 39 Kentucky 39 DHEC 39 Morgantown 39 Air Pollution Control 39 mountaintop removal mining 39 Piketon 39 Kentuckians 39 Kanawha 39 toxic fumes 39 Sago Mine 38 Jeffersonville 38 Pikeville 38 toxics 38 Roane County 38 ozone pollution 38 odors 38 Gov. Joe Manchin 38 hazardous materials 38 Manchin 38 hydrogen sulfide 38 Beshear 38 Anniston 37 chemicals 37 Hopkinsville 37 benzene 37 toxic waste 37 NIPSCO 37 Upshur County 37 styrene 37 nitrogen oxide emissions 37 Picher 37 toxins 37 particulates 37 Minnesota Pollution Control 37 asbestos 37 TVA 37 West Virginia 37 KDHE 37 volatile organic compounds 37 Evansville 37 Mayor Jerry Abramson 37 lung disease 37 particulate matter 37 Greater Cincinnati 37 particle pollution 37 Weirton 37 Gov. Steve Beshear 37 nitrogen oxide 37 hazardous material 37 Madisonville 37 Massey Energy 37 chromium 37 Dow Chemical Co. 37 smokestacks 37 Harrodsburg 37 secondhand smoke 37 mountaintop removal 37 MeadWestvaco 37 Hazelwood