SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., DEC. 14, 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 38 29 0.6 42 25 35 81 2 NW Coastal LA 45 34 0.9 37 21 30 73 3 SW Coastal LA 40 32 0.9 39 17 37 66 4 S Coastal LA 42 33 0.8 38 19 28 69 5 Southeast LA Co 42 32 1.8 41 33 37 96 6 W San Fernando Vly 46 37 1.5 33 16 36 64 7 E San Fernando Vly 44 34 1.2 41 18 36 68 8 W San Gabriel Vly 48 40 1.0 40 18 37 68 9 E San Gabriel Vly 50 41 0.7 21 17 31 66 10 Pomona Walnut Vly 48 35 1.0 38 35 42 99 11 S San Gabriel Vly 40 30 1.2 41 35 37 99 12 S Central LA Co 39 32 1.8 40 28 28 86 13 Santa Clarita Vly 45 35 0.3 34 10 23 53 15 San Gabriel Mts 47 39 0.8 39 11 34 55 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 36 30 0.6 31 8 31 44 Orange County: South Coast Air Basin 16 N Orange Co 49 36 0.7 44 34 33 97 17 Central Orange Co 51 36 1.2 37 33 43 96 18 N Coastal Orange Co 40 32 0.9 35 5 33 32 19 Saddleback Vly 49 42 0.6 44 20 38 71 20 Central Coastal 40 34 0.7 32 21 27 73 21 Capistrano Vly 42 36 0.6 29 20 22 71 Riverside County: South Coast Air Basin 22 Norco/Corona 52 41 1.3 57 36 40 102 23 Metro Riverside Co 50 38 1.4 63 36 40 102 24 Perris Vly 47 38 0.8 44 24 35 79 25 Lake Elsinore 50 43 0.6 29 24 20 79 26 Temecula Vly 46 40 0.5 27 7 19 39 27 Anza Vly 42 38 0.4 25 2 21 35 28 Hemet/San Jacinto 44 39 0.8 30 3 32 36 29 Banning 43 40 0.7 26 2 29 37 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 46 39 0.2 37 6 24 36 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 34 29 0.3 23 2 17 27 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 63 49 0.9 21 18 38 68 33 SW San Bernardino Vly 51 37 1.3 55 36 45 102 34 C San Bernardino Vly 42 35 1.1 34 14 50 60 35 E San Bernardino Vly 43 37 0.9 46 10 36 53 36 W San Bernardino Mtns 52 43 0.9 29 8 41 44 37 C San Bernardino Mtns 44 34 0.9 34 10 39 53 38 Big Bear Lake 47 44 0.9 31 9 34 50 San Bernardino County: Mojave Desert Air Basin 39 Phelan 43 40 0.8 32 6 36 37 40 Hesperia 32 26 0.8 35 8 38 44 41 Trona 33 20 0.4 21 2 10 19 42 Victorville 35 29 0.7 34 11 36 55 43 Yucca Vly 43 39 0.4 27 2 28 36 44 Barstow 31 20 0.6 27 3 43 41 45 Twentynine Palms 36 32 0.4 27 2 25 30 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., DEC. 14, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 44 PM2.5 Banning Pass Area AQI: 37 Ozone Big Bear Lake AQI: 50 PM2.5 Central Mojave Desert AQI: 36 Ozone Coachella Valley/Low Desert AQI: 36 Ozone Northern Mojave Desert AQI: 41 NO2 Temecula/Anza Area AQI: 39 PM2.5 MODERATE in the following area(s): Coastal Area AQI: 73 PM2.5 Hemet/Elsinore Area AQI: 79 PM2.5 Inland Orange County AQI: 96 PM2.5 Metropolitan Area AQI: 97 PM2.5 San Bernardino Mountains AQI: 53 PM2.5 San Fernando/Santa Clarita Valleys AQI: 68 PM2.5 San Gabriel Mountains AQI: 55 PM2.5 San Gabriel Valley AQI: 99 PM2.5 Victor Valley AQI: 55 PM2.5 UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Riverside Valley AQI: 102 PM2.5 San Bernardino Valley AQI: 102 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Light winds and onshore flow on Sunday. Inversion Base: 486 FT | Breaking Temperature: 70 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1584 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-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: Prohibited in South Coast Air Basin Below 3000 ft 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 SUNDAY, DECEMBER 14, 2025 IN THE SOUTH COAST AIR BASIN.