Valley Air District will perform scheduled system maintenance beginning at 6 PM on 6/29/2026. Some services may be temporarily unavailable for several hours.

Best Available Control Technology (BACT)

  • Recently Finalized BACT Guidelines
    • BACT Guideline 3.3.19 Stationary Fossil Fuel/Digester Gas-Fired Distributed Power Generation Equipment with Reciprocating Internal Combustion Engine (< 3 MW) - effective 3/4/26, final document here
    • BACT Guideline 5.6.2 Animal Feed Supplement Manufacturing - Palm Oil & Calcium Oxide Process - effective 3/12/26, final document here
    • BACT Guideline 4.7.2 Offset Lithographic Printing - Non-Heatset Press - effective 3/27/26, final document here
    • BACT Guideline 7.1.1 Thermally Enhanced Oil Recovery – Steam Enhanced Crude Oil Production Wells - effective 4/7/26, final document here
    • BACT Guideline 5.7.3 Turkey House - effective 5/7/26, final document here
    • BACT Guideline 5.7.2 Poultry - Layer House - effective 6/10/26, final document here
    • BACT Guideline 1.6.13 Dehydrator - Fruit and Vegetable (excluding onions), Continuous Belt - effective 6/29/26, final document here
  • Recent BACT Determination
    • BACT Guideline 1.1.1: Natural Gas or Propane-fired Boilers/Steam Generators (< 5 MMBtu/hr and ≤ 20 MMBtu/hr), final document here
    • BACT Guideline 1.1.2: Natural Gas or Propane-fired Boilers/Steam Generators (> 20 MMBtu/hr), final document here
    • BACT Guideline 1.4.9: Dairy Digester Gas Backup Limited Use Flares, final document here
    • BACT Guideline 1.4.10: Dairy Digester Gas Flares, final document here
    • BACT Guideline 3.1.1: Diesel-Fired Emergency IC Engines > 50 bhp Powering Electrical Generators, final document here
  • Best Available Control Technology (BACT) Policy
  • Send Comments/Suggestions to District's BACT Coordinator

For assistance or if you have any questions, please feel free to contact us.

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