SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., DEC. 26, 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 33 28 0.5 8 6 27 33 2 NW Coastal LA 33 31 0.4 7 3 17 29 3 SW Coastal LA 34 31 0.3 7 4 21 29 4 S Coastal LA 37 34 0.3 7 5 28 31 5 Southeast LA Co 37 30 0.4 8 6 25 33 6 W San Fernando Vly 36 35 0.3 6 2 17 32 7 E San Fernando Vly 32 30 0.4 8 4 21 28 8 W San Gabriel Vly 37 31 0.2 7 5 14 29 9 E San Gabriel Vly 34 31 0.3 6 2 17 29 10 Pomona Walnut Vly 31 27 0.4 10 4 27 25 11 S San Gabriel Vly 37 29 0.4 8 5 25 28 12 S Central LA Co 36 30 0.4 8 6 21 33 13 Santa Clarita Vly 39 37 0.2 6 4 12 34 15 San Gabriel Mts 36 34 0.3 10 3 17 31 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 44 40 0.2 4 3 11 37 Orange County: South Coast Air Basin 16 N Orange Co 36 30 0.3 9 5 21 28 17 Central Orange Co 32 28 0.4 7 5 12 28 18 N Coastal Orange Co 38 35 0.3 7 5 23 32 19 Saddleback Vly 36 34 0.2 9 6 16 33 20 Central Coastal 36 34 0.2 5 5 14 31 21 Capistrano Vly 37 34 0.2 5 4 10 31 Riverside County: South Coast Air Basin 22 Norco/Corona 30 28 0.4 12 8 20 44 23 Metro Riverside Co 31 28 0.6 13 9 20 50 24 Perris Vly 33 30 0.3 9 4 17 28 25 Lake Elsinore 38 34 0.2 3 3 8 31 26 Temecula Vly 36 33 0.2 7 1 12 31 27 Anza Vly 39 38 0.3 9 1 15 35 28 Hemet/San Jacinto 37 35 0.3 9 3 17 32 29 Banning 42 39 0.3 9 4 10 36 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 51 45 0.3 31 6 22 42 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 40 38 0.2 13 4 14 35 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 40 36 0.3 12 5 17 33 33 SW San Bernardino Vly 32 29 0.3 12 7 24 39 34 C San Bernardino Vly 32 30 0.2 10 5 25 28 35 E San Bernardino Vly 33 32 0.4 10 5 18 30 36 W San Bernardino Mtns 38 36 0.2 10 4 20 33 37 C San Bernardino Mtns 44 42 0.2 10 3 20 39 38 Big Bear Lake 38 37 0.2 12 6 22 34 San Bernardino County: Mojave Desert Air Basin 39 Phelan 40 40 0.2 6 4 20 37 40 Hesperia 38 36 0.2 4 4 20 33 41 Trona 41 37 0.2 7 3 16 34 42 Victorville 40 38 0.2 5 5 21 35 43 Yucca Vly 43 41 0.3 19 4 21 38 44 Barstow 44 41 0.2 7 4 27 38 45 Twentynine Palms 41 40 0.3 17 4 20 37 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., DEC. 26, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 37 Ozone Banning Pass Area AQI: 36 Ozone Big Bear Lake AQI: 34 Ozone Central Mojave Desert AQI: 38 Ozone Coachella Valley/Low Desert AQI: 42 Ozone Coastal Area AQI: 32 Ozone Hemet/Elsinore Area AQI: 32 Ozone Inland Orange County AQI: 33 PM2.5 Metropolitan Area AQI: 33 PM2.5 Northern Mojave Desert AQI: 38 Ozone Riverside Valley AQI: 50 PM2.5 San Bernardino Mountains AQI: 39 Ozone San Bernardino Valley AQI: 39 PM2.5 San Fernando/Santa Clarita Valleys AQI: 34 Ozone San Gabriel Mountains AQI: 31 Ozone San Gabriel Valley AQI: 29 Ozone Temecula/Anza Area AQI: 35 Ozone Victor Valley AQI: 37 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Rain in the South Coast Air Basin on Friday. Onshore light pressure gradients. Inversion Base: 4653 FT | Breaking Temperature: 62 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1981 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 26, 2025 IN THE SOUTH COAST AIR BASIN.