Chapter NR 235 - Organic chemical manufacturing
- Subchapter I - General Provisions (§ NR 235.01 to NR 235.04)
- Subchapter II - Rayon Fibers (§ NR 235.10 to NR 235.15)
- Subchapter III - Other Fibers (§ NR 235.20 to NR 235.25)
- Subchapter IV - Thermoplastic Resins (§ NR 235.30 to NR 235.35)
- Subchapter V - Thermosetting Resins (§ NR 235.40 to NR 235.45)
- Subchapter VI - Commodity Organic Chemicals (§ NR 235.50 to NR 235.55)
- Subchapter VII - Bulk Organic Chemicals (§ NR 235.60 to NR 235.65)
- Subchapter VIII - Specialty Organic Chemicals (§ NR 235.70 to NR 235.75)
- Subchapter IX - Pipe Biological Treatment (§ NR 235.80 to NR 235.81)
- Subchapter X - Direct Discharge Point Sources That Do Not Use End-of-Pipe Biological Treatment (§ NR 235.90 to NR 235.91)
- Subchapter XI - Indirect Discharge Point Sources (§ NR 235.98 to NR 235.99)
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