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Regulations last checked for updates: May 23, 2025

Title 40 - Protection of Environment last revised: Apr 23, 2028
All TitlesTitle 40Chapter IPart 52Subpart M - Subpart M—Hawaii
  • § 52.620 - Identification of plan.
  • § 52.621 - Classification of regions.
  • § 52.622 - Original identification of plan.
  • § 52.623 - Approval status.
  • § 52.624 - General requirements.
  • § 52.625 - Legal authority.
  • § 52.626 - Compliance schedules.
  • §§ 52.627-52.631 - §[Reserved]
  • § 52.632 - Significant deterioration of air quality.
  • § 52.633 - Visibility protection.
  • § 52.634 - Particulate matter (PM-10) Group III SIP.
authority: 42 U.S.C. 7401
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