| Environment/Superfund | Environment/Superfund | 99 |
| Clean Air and Water (quality) | Clean Air and Water (quality) | 57 |
| Small Business | Small Business | 17 |
| Labor Issues/Antitrust/Workplace | Labor Issues/Antitrust/Workplace | 16 |
| Energy/Nuclear | Energy/Nuclear | 15 |
| Manufacturing | Manufacturing | 12 |
| Trucking/Shipping | Trucking/Shipping | 12 |
| Chemicals/Chemical Industry | Chemicals/Chemical Industry | 11 |
| Torts | Torts | 11 |
| Waste (hazardous/solid/interstate/nuclear) | Waste (hazardous/solid/interstate/nuclear) | 11 |
| Taxation/Internal Revenue Code | Taxation/Internal Revenue Code | 11 |
| Food Industry (safety, labeling, etc.) | Food Industry (safety, labeling, etc.) | 10 |
| Consumer Issues/Safety/Products | Consumer Issues/Safety/Products | 10 |
| Medical/Disease Research/Clinical Labs | Medical/Disease Research/Clinical Labs | 8 |
| Health Issues | Health Issues | 8 |
| Medicare/Medicaid | Medicare/Medicaid | 7 |
| Science/Technology | Science/Technology | 6 |
| Trade (domestic/foreign) | Trade (domestic/foreign) | 5 |
| Defense | Defense | 3 |
| Utilities | Utilities | 2 |