Chs. NR 1-99; Fish, Game and Enforcement, Forestry and Recreation
Chs. NR 200-299; Environmental Protection – Wisconsin Pollutant Discharge Elimination System
Chs. NR 300-399; Environmental Protection – Water Regulation
Chs. NR 400-499; Environmental Protection – Air Pollution Control
Chs. NR 500-599; Environmental Protection – Solid Waste Management
Chs. NR 600-699; Environmental Protection – Hazardous Waste Management