U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 30, 2025

All TitlesTitle 40Chapter IPart 52Subpart QQ - Subpart QQ—South Dakota
§ 52.2170 - Identification of plan.
§ 52.2171 - Classification of regions.
§ 52.2172 - Approval status.
§ 52.2173 - Legal authority.
§§ 52.2174-52.2177 - §[Reserved]
§ 52.2178 - Significant deterioration of air quality.
§ 52.2179 - Visibility protection.
§ 52.2180 - Stack height regulations.
§ 52.2181 - [Reserved]
§ 52.2182 - PM10 Committal SIP.
§ 52.2183 - Variance provision.
§ 52.2184 - Operating permits for minor sources.
§ 52.2185 - Change to approved plan.
§ 52.2186 - Original identification of plan section.
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