{"data":{"id":"us/40-cfr-49.10735","jurisdiction":"us","citation":"40 CFR 49.10735","heading":"Classification of regions for episode plans.","body":"The air quality control region which encompasses the Siletz Reservation is classified as follows for purposes of episode plans:\nPollutant Classification\nCarbon monoxide III\nNitrogen dioxide III\nOzone III\nParticulate matter (PM10) III\nSulfur oxides III","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER B—GRANTS AND OTHER FEDERAL ASSISTANCE","PART 49—INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT","Subpart M—Implementation Plans for Tribes—Region X"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"e489f347003443a4ab0204410737b70753382bbbf0e4bf85802408250d85315c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-49.10734","next":"us/40-cfr-49.10736"},"notice":"GroundRules: Original legal text. Not legal advice."}