| Administrative Waivers - Natural Resources Council | 1963-1977 |
| Administrative Waivers - Water, Air and Waste Management | 1978-1983 |
| Agency Letters to Editor | 1976 |
| Completed Investigations | 1964-1975 |
| Construction Grants Programs | 1973-1980 |
| Council Orders | 1953-1983 |
| County Conservation Boards, Comprehensive Outdoor Recreation Plans | 1975-1992 |
| Executive Correspondence | 1974-1988 |
| Federal/State Programs and Projects | 1972-1982 |
| Flood Plain Permits, Milldams | 1924-1986 |
| Flood Plain Photographs | Undated |
| Hazardous Material Planning | 1970-1978 |
| Hazardous Substance Incidents (Spill Files) | 1970-1975 |
| Hazardous Waste Management | 1975-1984 |
| Hearings | 1957-1983, Undated |
| Information and Educational Programs | 1961, 1975-1981, Undated |
| Landfills | 1973-1975 |
| Legislative Liaison | 1967-1984 |
| Legislative Proposals | 1977-1978 |
| Litigation, Water Quality | 1959-1980 |
| Milldams, Miscellaneous Lowhead Dam Files | 1925-1949 |
| Minutes - Air Quality Commission | |
| Minutes - Energy Policy Council | 1981-1986 |
| Minutes - Environmental Protection Commission | 1982 |
| Minutes - Environmental Quality Commission | 1981-1983 |
| Minutes - Environmental Quality Transition Team | 1982 |
| Minutes - IMPACT | 1985 |
| Minutes - Natural Resources Council | 1953-1983 |
| Minutes - Rules and Standards Committee | 1983-1986 |
| Minutes - Solid Waste Commission | 1975 |
| Minutes - Water, Air and Waste Management | 1983-1986 |
| Minutes - Water, Air and Waste Management, Closed Executive Session | 1981-1984 |
| Multiple Permit Applications | 1977-1984 |
| Priority List, Environmental Quality | 1957-1980 |
| Program Planning and Project Development | 1964-1985 |
| Radiation Planning | 1977-1984 |
| Speeches | 1974-1977 |
| State Implementation Plans, Plant and Regulatory Information | |
| Wastewater, Closed Facility Files | 1940-1980 |
| Wastewater, Closed Legal Files | 1954-1975 |
| Wastewater, Facility Files | 1973-1981 |
| Wastewater, Facility Plans | 1966-1979 |
| Wastewater, Preliminary Reports | 1968-1980 |
| Wastewater, Sewage (Closed) | 1966-1981 |
| Wastewater, Sewage Inventories | 1941-1956 |
| Water Supply, Closed Facility Files | Undated |
| Water Supply, Preliminary Reports | 1974-1980 |
| Water Supply, Railroad Files | 1940-1976 |
| Water Supply, School Files | 1940-1976 |
| Watershed Files | 1949-1986 |