Title 0400 - Environment and Conservation
- Subtitle 0400-01 - Office of the Commissioner (§§ 0400-01-01-.01 — 0400-01-40-.05)
- Subtitle 0400-02 - Division of State Parks and Division of Natural Areas (§§ 0400-02-01-.01 — 0400-02-13-.09)
- Subtitle 0400-03 - Division of Surface Mining (§§ 0400-03-01-.01 — 0400-03-12-.04)
- Subtitle 0400-04 - Repealed
- Subtitle 0400-05 - Division of Administration (§ 0400-05-01-.01)
- Subtitle 0400-06 - Division of Natural Areas (§§ 0400-06-01-.01 — 0400-06-02-.13)
- Subtitle 0400-07 - Division of Geology (§ 0400-07-01-.01)
- Subtitle 0400-08 - Division of Forestry
- Subtitle 0400-09 - Division of Archaeology (§§ 0400-09-01-.01 — 0400-09-01-.05)
- Subtitle 0400-10 - Solid Waste Management (Administrative) (§ 0400-10-01-.01)
- Subtitle 0400-11 - Division of Solid Waste Management (Solid Waste Program) (§§ 0400-11-01-.01 — 0400-11-02-.06)
- Subtitle 0400-12 - Division of Solid Waste Management (Hazardous Waste Program) (§§ 0400-12-01-.01 — 0400-12-02-.03)
- Subtitle 0400-15 - Division of Remediation (§§ 0400-15-01-.01 — 0400-15-03-.10)
- Subtitle 0400-18 - Division of Petroleum Underground Storage Tanks (§§ 0400-18-01-.01 — 0400-18-01-.17)
- Subtitle 0400-20 - Division of Radiological Health (§§ 0400-20-04-.01 — 0400-20-13-.08)
- Subtitle 0400-30 - Division of Air Pollution Control (§§ 0400-30-17-.01 — 0400-30-39-.03)
- Subtitle 0400-40 - Water Resources (WPC) (§§ 0400-40-01-.01 — 0400-40-18-.04)
- Subtitle 0400-42 - Water Pollution Control (Surface Mining) (§§ 0400-42-01-.01 — 0400-42-12-.04)
- Subtitle 0400-43 - Water Resources (Mineral Test Holes) (§§ 0400-43-01-.01 — 0400-43-01-.06)
- Subtitle 0400-44 - Division of Water Resources (§§ 0400-44-01-.01 — 0400-44-01-.14)
- Subtitle 0400-45 - Division of Water Resources (§§ 0400-45-01-.01 — 0400-45-10-.05)
- Subtitle 0400-46 - Water Resources (State Revolving Fund Program) (§§ 0400-46-01-.01 — 0400-46-06-.08)
- Subtitle 0400-48 - Water Resources (Groundwater Protection) (§§ 0400-48-01-.01 — 0400-48-01-.24)
- Subtitle 0400-49 - Water Resources (Water and Waste Water Operator Certification) (§§ 0400-49-01-.01 — 0400-49-01-.12)
- Subtitle 0400-51 - Terms (Transferred from 1040-01-01 ) (§ 0400-51-01-.01)
- Subtitle 0400-52 - Drilling, Re-Entering, Plugging and Abandoning Exploratory and Exploitation Oil and Gas Wells (Transferred from 1040-02 ) (§§ 0400-52-01-.01 — 0400-52-12-.02)
- Subtitle 0400-53 - Testing and Completing Wells for Production (Transferred from 1040-03 ) (§§ 0400-53-01-.01 — 0400-53-03-.02)
- Subtitle 0400-54 - Production (Transferred from 1040-04 ) (§§ 0400-54-01-.01 — 0400-54-09-.08)
- Subtitle 0400-55 - Unitization (Transferred from 1040-05-01 ) (§§ 0400-55-01-.01 — 0400-55-01-.03)
- Subtitle 0400-56 - Administrative Procedures (Transferred from 1040-06 ) (§§ 0400-56-01-.01 — 0400-56-01-.02)
- Subtitle 0400-57 - Forms (Transferred from 1040-07-01 ) (§ 0400-57-01-.01)
- Subtitle 0400-58 - NGPA Processing Transferred from 1040-08-01 ) (§§ 0400-58-01-.01 — 0400-58-01-.10)
- Subtitle 0400-60 - Office of Energy Programs (§§ 0400-60-01-.01 — 0400-60-05-.15)
- Subtitle 0400-70 - Waivers (§ 0400-70-01-.01)