SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., DEC. 01, 2025 -------------------------------------------------------------------------------- SRA AREA 1-HR 8-HR 8-HR 24-HR 24-HR 1-HR MAX NUMBER OZONE OZONE CO PM10 PM2.5 NO2 AQI PPB PPB PPM UG/M3 UG/M3 PPB -------------------------------------------------------------------------------- Los Angeles County: South Coast Air Basin 1 Central LA Co 41 35 0.7 39 16 40 64 2 NW Coastal LA 45 39 0.8 35 19 29 69 3 SW Coastal LA 46 41 0.7 36 14 35 60 4 S Coastal LA 48 42 1.0 34 13 49 58 5 Southeast LA Co 43 37 1.6 37 20 42 71 6 W San Fernando Vly 45 41 0.8 30 13 22 58 7 E San Fernando Vly 43 37 0.8 37 13 37 58 8 W San Gabriel Vly 42 38 0.7 36 10 37 53 9 E San Gabriel Vly 43 39 0.3 22 6 25 36 10 Pomona Walnut Vly 40 34 0.9 31 17 36 66 11 S San Gabriel Vly 39 33 0.8 37 19 37 69 12 S Central LA Co 46 39 1.6 37 19 36 69 13 Santa Clarita Vly 44 42 0.3 29 8 21 44 15 San Gabriel Mts 43 40 0.5 34 6 32 37 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 46 39 0.4 20 10 22 53 Orange County: South Coast Air Basin 16 N Orange Co 42 39 0.6 33 20 30 71 17 Central Orange Co 41 38 1.0 31 17 38 66 18 N Coastal Orange Co 53 49 0.9 30 6 44 45 19 Saddleback Vly 56 52 0.4 33 12 33 56 20 Central Coastal 57 52 0.6 25 10 30 53 21 Capistrano Vly 56 52 0.4 22 9 22 50 Riverside County: South Coast Air Basin 22 Norco/Corona 46 39 0.7 40 20 32 71 23 Metro Riverside Co 47 38 0.7 45 18 30 68 24 Perris Vly 45 40 0.6 37 10 26 53 25 Lake Elsinore 48 43 0.5 20 7 17 40 26 Temecula Vly 46 40 0.4 23 4 17 37 27 Anza Vly 46 43 0.3 26 5 17 40 28 Hemet/San Jacinto 45 42 0.5 31 6 22 39 29 Banning 44 43 0.5 28 7 13 40 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- SRA AREA 1-HR 8-HR 8-HR 24-HR 24-HR 1-HR MAX NUMBER OZONE OZONE CO PM10 PM2.5 NO2 AQI PPB PPB PPM UG/M3 UG/M3 PPB -------------------------------------------------------------------------------- Riverside County: Salton Sea Air Basin 30 Coachella Vly 48 43 0.2 36 13 19 58 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 39 36 0.2 24 6 16 33 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 48 42 0.5 26 8 33 44 33 SW San Bernardino Vly 43 35 0.9 40 19 35 69 34 C San Bernardino Vly 44 37 0.7 36 7 31 39 35 E San Bernardino Vly 45 40 0.6 40 7 26 39 36 W San Bernardino Mtns 47 43 0.6 28 4 31 40 37 C San Bernardino Mtns 46 41 0.6 34 5 31 38 38 Big Bear Lake 47 45 0.6 31 15 25 62 San Bernardino County: Mojave Desert Air Basin 39 Phelan 49 46 0.5 22 4 31 43 40 Hesperia 44 38 0.6 22 7 32 39 41 Trona 41 36 0.3 14 4 16 33 42 Victorville 47 41 0.5 22 10 33 53 43 Yucca Vly 44 43 0.3 27 7 23 40 44 Barstow 45 37 0.4 17 4 36 34 45 Twentynine Palms 42 39 0.3 26 7 22 39 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., DEC. 01, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 40 Ozone Central Mojave Desert AQI: 40 Ozone Northern Mojave Desert AQI: 34 Ozone San Bernardino Mountains AQI: 40 Ozone San Gabriel Mountains AQI: 37 Ozone Temecula/Anza Area AQI: 40 Ozone MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Big Bear Lake AQI: 62 PM2.5 Coachella Valley/Low Desert AQI: 58 PM2.5 Coastal Area AQI: 69 PM2.5 Hemet/Elsinore Area AQI: 53 PM2.5 Inland Orange County AQI: 66 PM2.5 Metropolitan Area AQI: 71 PM2.5 Riverside Valley AQI: 71 PM2.5 San Bernardino Valley AQI: 69 PM2.5 San Fernando/Santa Clarita Valleys AQI: 58 PM2.5 San Gabriel Valley AQI: 69 PM2.5 Victor Valley AQI: 53 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Weak to locally moderate Santa Ana winds develop in the morning. Warmer and drier west of the mountains; cooler in the mountains and deserts. Morning low clouds and fog likely, clearing by midday. Inversion Base: 486 FT | Breaking Temperature: 58 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2891 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: BURN Area 53 - Mojave Desert Air Basin: BURN Area 55 - Salton Sea Air Basin: BURN Beach Fire Ring Wood Burning: Allowed in All Areas Residential Wood Burning: Allowed in All Areas Coachella Valley Rule 403.1 Wind Forecast: Winds Below 25 MPH ------------------------------------------------------------------------ ATTENTION ALL SCHOOLS AND INDUSTRIES THIS IS THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT NO AIR POLLUTION OR HEALTH ADVISIORY EPISODES ARE PREDICTED FOR MONDAY, DECEMBER 01, 2025 IN THE SOUTH COAST AIR BASIN.