Indiana Administrative Code Title 326 - AIR POLLUTION CONTROL DIVISION
Indiana’s Title 326 – Air Pollution Control Division of the Indiana Administrative Code covers comprehensive rules governing the prevention and control of air pollution in the state. Here's a clear breakdown based on the latest available information:
📌 Overview of Title 326
According to both the Indiana Administrative Code database and resources like Cornell Law, Title 326 is organized into 26 distinct articles addressing everything from general provisions to specialized emission controls
🔹 Article Structure
Article 1 – General Provisions
Article 2 – Permit Review Rules (Rules 2‑1 to 2‑14)
Article 3 – Monitoring Requirements (3‑1 to 3‑8)
Article 4 – Burning Regulations
Article 5 – Opacity Regulations
Article 6 – Particulate Rules, with 6.5 for the rest of the state and 6.8 specific to Lake County
Article 7 – Sulfur Dioxide Rules
Article 8 – Volatile Organic Compound Rules
Article 9 – Carbon Monoxide Emission Rules
Article 10 – Nitrogen Oxides Rules
Article 11 – Emission Limits by Operation Type
Article 12 – New Source Performance Standards
Article 13 – Motor Vehicle Emission & Fuel Standards
Article 14 – Emission Standards for Hazardous Air Pollutants
Article 15 – Lead Rules
Article 16 – State Environmental Policy
Article 17.1 – Public Records & Confidentiality
Article 18 – Asbestos Management
Article 19 – Mobile Source Rules
Article 20 – Hazardous Air Pollutants
Article 21 – Acid Deposition Control
Article 22 – Stratospheric Ozone Protection
Article 23 – Lead‑Based Paint Program
Article 24 – Cross‑State Air Pollution Rule (CSAPR)
Article 25 – Voluntary Performance‑Based Leadership
Article 26 – Regional Haze
🔎 Sample Content Highlights
Article 1: General Provisions covers definitions (e.g., “allowable emissions,” “particulate matter,” “BACT”), references to federal Clean Air and Code of Federal Regulations, an anti-severability clause, use of credible evidence for compliance, and ambient air quality standards
Article 2: Permit Review Rules includes rules like the permit‑by‑rule program (326 IAC 2‑10) and the major source hazardous air pollutant procedures (2‑4.1)
Article 12: New Source Performance Standards sets federal-equivalent emissions limits for newly constructed or modified sources
🔧 How the Rulemaking Process Works
Your IDEM Legal Counsel page explains that a preliminary adoption hearing occurred on June 11, 2025, with a public comment period from April 9 to May 9, 2025. Once finalized, rules follow a multilayer review: IDEM → Attorney General → Governor → Legislative Services for publication. Most rules take effect 30 days after filing, unless otherwise stated ).
🧭 If You’re Looking For…
Full text of specific rules (e.g., 326 IAC 1‑2 definitions or 2‑10 permit‑by‑rule): check IAR (Indiana Administrative Rules) or Justia/ Cornell links.
Recent or proposed changes: the IDEM legal counsel page includes DIN numbers and hearing dates
Compliance guidance or permitting contacts: IDEM’s Air Quality division provides forms, staff contacts, and resources via their site .
✅ Next Steps
To review a particular Article or Rule, I can fetch the full text or summarize.
To track upcoming changes, I can check for recent Indiana Register postings or federal adoption status.
To assist with compliance, I can locate forms, application procedures, or contact IDEM personnel.
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