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