40 C.F.R. § 52.1471 — Classification of regions.
§ 52.1471 Classification of regions. The Nevada plan is evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Las Vegas Intrastate I III III I I Northwest Nevada Intrastate I III III III III Nevada Intrastate IA III III III III [80 FR 67663, Nov. 3, 2015]