SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., DEC. 29, 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 30 0.7 34 9 43 50 2 NW Coastal LA 40 34 0.5 29 7 31 39 3 SW Coastal LA 36 28 0.7 31 14 42 60 4 S Coastal LA 42 30 1.5 28 14 53 60 5 Southeast LA Co 40 29 1.7 31 12 47 56 6 W San Fernando Vly 40 37 0.5 25 3 21 34 7 E San Fernando Vly 35 31 0.6 33 6 39 37 8 W San Gabriel Vly 38 33 0.6 31 6 39 37 9 E San Gabriel Vly 38 36 0.4 12 1 25 33 10 Pomona Walnut Vly 38 34 0.7 19 5 42 40 11 S San Gabriel Vly 38 28 1.1 31 7 39 39 12 S Central LA Co 42 28 1.7 31 17 40 66 13 Santa Clarita Vly 42 40 0.2 24 5 15 37 15 San Gabriel Mts 38 36 0.4 30 4 33 33 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 40 38 0.3 16 9 25 50 Orange County: South Coast Air Basin 16 N Orange Co 43 34 0.7 22 7 31 39 17 Central Orange Co 38 31 0.7 18 7 35 39 18 N Coastal Orange Co 42 36 1.3 21 9 46 50 19 Saddleback Vly 44 40 0.4 21 5 31 37 20 Central Coastal 42 38 0.6 20 6 28 35 21 Capistrano Vly 41 37 0.4 22 4 20 34 Riverside County: South Coast Air Basin 22 Norco/Corona 41 37 0.4 23 4 26 34 23 Metro Riverside Co 43 39 0.6 25 4 20 36 24 Perris Vly 42 36 0.5 22 3 20 33 25 Lake Elsinore 45 38 0.3 23 0 14 35 26 Temecula Vly 43 40 0.3 22 2 14 37 27 Anza Vly 44 41 0.3 21 2 15 38 28 Hemet/San Jacinto 44 39 0.4 21 3 16 36 29 Banning 47 42 0.4 16 4 8 39 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 45 41 0.3 31 7 17 39 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 37 35 0.2 18 4 13 32 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 51 48 0.5 13 5 33 44 33 SW San Bernardino Vly 41 37 0.7 23 5 37 35 34 C San Bernardino Vly 41 37 0.5 22 2 22 34 35 E San Bernardino Vly 41 35 0.5 21 3 20 32 36 W San Bernardino Mtns 45 42 0.4 18 2 28 39 37 C San Bernardino Mtns 45 40 0.5 22 2 29 37 38 Big Bear Lake 46 43 0.5 19 6 27 40 San Bernardino County: Mojave Desert Air Basin 39 Phelan 43 41 0.4 20 4 33 38 40 Hesperia 40 35 0.4 22 5 33 32 41 Trona 38 34 0.2 10 2 10 31 42 Victorville 44 38 0.4 21 7 35 39 43 Yucca Vly 44 43 0.3 21 4 23 40 44 Barstow 42 38 0.3 18 4 44 42 45 Twentynine Palms 38 36 0.3 20 4 21 33 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., DEC. 29, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 50 PM2.5 Banning Pass Area AQI: 39 Ozone Big Bear Lake AQI: 40 Ozone Central Mojave Desert AQI: 40 Ozone Coachella Valley/Low Desert AQI: 39 PM2.5 Hemet/Elsinore Area AQI: 36 Ozone Inland Orange County AQI: 39 PM2.5 Northern Mojave Desert AQI: 42 NO2 Riverside Valley AQI: 36 Ozone San Bernardino Mountains AQI: 39 Ozone San Bernardino Valley AQI: 44 Ozone San Fernando/Santa Clarita Valleys AQI: 37 Ozone San Gabriel Mountains AQI: 33 Ozone San Gabriel Valley AQI: 40 NO2 Temecula/Anza Area AQI: 38 Ozone Victor Valley AQI: 39 PM2.5 MODERATE in the following area(s): Coastal Area AQI: 60 PM2.5 Metropolitan Area AQI: 66 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The weather will be warmer and dryer on Monday. A three-day Santa Ana wind event will start Sunday and peak on Monday. NWS has issued wind advisory. Visit https://www.weather.gov/sgx/ and https://www.weather.gov/lox/ for more details. Inversion Base: 486 FT | Breaking Temperature: 64 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2134 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 Above 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 29, 2025 IN THE SOUTH COAST AIR BASIN.