<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="UTF-8" /><title></title><meta name="Generator" content="PowerTools for Open XML" /><style>span { white-space: pre-wrap; } p.sf78bcca7-5704-49d2-83b0-1d000d69b2daP0 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: justify; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } span.sf78bcca7-5704-49d2-83b0-1d000d69b2daC0 { background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000001 { background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sf78bcca7-5704-49d2-83b0-1d000d69b2da000003 { background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } p.sf78bcca7-5704-49d2-83b0-1d000d69b2daP0-000004 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: left; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } </style></head><body><div><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">    </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:02:02"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000000">74:36:02:02</span></a><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000001">.  Ambient air quality standards.</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> The ambient air quality standards listed in 40 C.F.R. §§ 50.1 </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">through</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> 50.</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">3</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">, (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">); 40 C.F.R. §</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.6 (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">); 40 C.F.R. § 50.8</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> (July 1, 2024);</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> 40 C.F.R. §</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.11 (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">); 40 C.F.R. §</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.13 (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">); 40 C.F.R. §</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.14 (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">); 40 C.F.R. §§</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.16 </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">and</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> 50.1</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">7</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">)</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">; </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">40 C.F.R. §§</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.1</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">9</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">and</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> 50.</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">20</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> (July 1, 20</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">24</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">)</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">;</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">and 89 Fed. Reg. 105,785,105,785 (December 27, 2024) (to be codified at 40 C.F.R. </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">§</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">50.</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">21), </span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">define the types and levels of air pollution above which the ambient air would limit the attainment of the goals specified in § </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:02:01"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002">74:36:02:01</span></a><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">. These standards apply to the entire state and no person may cause these standards to be exceeded. The standards include normal background levels of air pollutants.</span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2da000003"> </span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">    </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000001">Source:</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> SL 1975, ch 16, § 1; 2 SDR 40, effective December 7, 1975; transferred from § 34:10:02:02, 7 SDR 4, effective July 27, 1980; transferred from § 44:10:02:02, effective July 1, 1981; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 17 SDR 170, effective May 13, 1991; transferred from § 74:26:02:02, 19 SDR 157, effective April 22, 1993; 21 SDR 119, effective January 5, 1995; 25 SDR 123, effective April 4, 1999; 26 SDR 168, effective June 27, 2000; 31 SDR 101, effective January 2, 2005; 32 SDR 209, effective June 13, 2006; 36 SDR 207, effective June 28, 2010; 39 SDR 219, effective June 25, 2013; 42 SDR 52, effective October 13, 2015; 44 SDR 43, effective September 13, 2017; 46 SDR 64, effective November 25, 2019</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">; 52 SDR 27, effective September 17, 2025</span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">.</span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">    </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000001">General Authority:</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002">34A-1-6</span></a><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-15"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002">34A-1-15</span></a><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">.</span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">    </span><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000001">Law Implemented:</span><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-1"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002">34A-1-1</span></a><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-15"><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0-000002">34A-1-15</span></a><span class="sf78bcca7-5704-49d2-83b0-1d000d69b2daC0">.</span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2da000003"> </span></p><p dir="ltr" class="sf78bcca7-5704-49d2-83b0-1d000d69b2daP0-000004"><span xml:space="preserve" class="sf78bcca7-5704-49d2-83b0-1d000d69b2da000003"> </span></p></div></body></html>