SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., DEC. 05, 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 34 28 0.6 24 14 43 60 2 NW Coastal LA 36 31 0.6 23 12 32 56 3 SW Coastal LA 43 33 0.9 23 14 39 60 4 S Coastal LA 36 29 1.1 23 16 47 64 5 Southeast LA Co 32 27 2.0 24 17 44 66 6 W San Fernando Vly 40 36 1.0 22 12 37 56 7 E San Fernando Vly 36 30 0.9 25 11 39 55 8 W San Gabriel Vly 36 32 0.7 26 12 36 56 9 E San Gabriel Vly 40 35 0.5 10 7 42 40 10 Pomona Walnut Vly 41 32 0.9 26 11 39 55 11 S San Gabriel Vly 34 28 0.8 24 14 43 60 12 S Central LA Co 37 30 2.0 24 19 40 69 13 Santa Clarita Vly 45 40 0.3 26 8 22 44 15 San Gabriel Mts 40 36 0.6 30 8 36 44 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 37 32 0.6 33 8 30 44 Orange County: South Coast Air Basin 16 N Orange Co 33 28 0.8 30 15 36 62 17 Central Orange Co 30 26 1.0 23 14 40 60 18 N Coastal Orange Co 37 31 1.0 22 13 44 58 19 Saddleback Vly 40 35 0.5 30 14 38 60 20 Central Coastal 35 32 0.6 19 15 36 62 21 Capistrano Vly 38 34 0.5 16 16 31 64 Riverside County: South Coast Air Basin 22 Norco/Corona 43 36 1.0 40 17 38 66 23 Metro Riverside Co 42 34 1.0 46 16 39 64 24 Perris Vly 40 35 0.9 23 9 36 50 25 Lake Elsinore 44 38 0.5 14 6 30 35 26 Temecula Vly 43 39 0.4 20 3 29 36 27 Anza Vly 44 41 0.4 23 3 29 38 28 Hemet/San Jacinto 43 39 0.8 18 3 37 36 29 Banning 43 41 0.8 17 4 39 38 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 43 42 0.3 36 9 30 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 39 35 0.3 23 4 23 32 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 46 39 0.6 23 8 40 44 33 SW San Bernardino Vly 41 32 1.0 40 14 41 60 34 C San Bernardino Vly 38 33 1.1 21 9 42 50 35 E San Bernardino Vly 39 35 1.0 22 7 37 39 36 W San Bernardino Mtns 41 37 0.8 24 5 38 36 37 C San Bernardino Mtns 39 35 1.0 26 8 35 44 38 Big Bear Lake 38 37 0.9 22 8 36 44 San Bernardino County: Mojave Desert Air Basin 39 Phelan 44 43 0.7 27 7 34 40 40 Hesperia 36 33 0.8 28 8 35 44 41 Trona 26 24 0.4 21 3 17 22 42 Victorville 39 36 0.7 28 8 35 44 43 Yucca Vly 40 39 0.5 26 6 32 36 44 Barstow 36 30 0.6 24 6 39 37 45 Twentynine Palms 38 36 0.4 25 5 29 33 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., DEC. 05, 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: 38 Ozone Big Bear Lake AQI: 44 PM2.5 Central Mojave Desert AQI: 36 Ozone Coachella Valley/Low Desert AQI: 50 PM2.5 Hemet/Elsinore Area AQI: 50 PM2.5 Northern Mojave Desert AQI: 37 NO2 San Bernardino Mountains AQI: 44 PM2.5 San Gabriel Mountains AQI: 44 PM2.5 Temecula/Anza Area AQI: 38 Ozone Victor Valley AQI: 44 PM2.5 MODERATE in the following area(s): Coastal Area AQI: 64 PM2.5 Inland Orange County AQI: 64 PM2.5 Metropolitan Area AQI: 69 PM2.5 Riverside Valley AQI: 66 PM2.5 San Bernardino Valley AQI: 60 PM2.5 San Fernando/Santa Clarita Valleys AQI: 56 PM2.5 San Gabriel Valley AQI: 60 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Offshore pressure gradients and Santa Ana winds on Friday. Inversion Base: 486 FT | Breaking Temperature: 62 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1682 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 FRIDAY, DECEMBER 05, 2025 IN THE SOUTH COAST AIR BASIN.