SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: TUE., DEC. 30, 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 35 27 0.6 26 8 45 44 2 NW Coastal LA 36 30 0.4 23 8 26 44 3 SW Coastal LA 36 28 0.6 25 15 29 62 4 S Coastal LA 39 25 1.0 23 17 55 66 5 Southeast LA Co 37 24 1.5 25 14 51 60 6 W San Fernando Vly 37 34 1.0 21 4 32 31 7 E San Fernando Vly 31 28 0.8 25 6 43 41 8 W San Gabriel Vly 38 33 0.7 25 6 43 41 9 E San Gabriel Vly 38 33 0.4 12 1 27 31 10 Pomona Walnut Vly 36 29 0.8 20 6 38 36 11 S San Gabriel Vly 34 24 0.9 25 8 44 44 12 S Central LA Co 37 23 1.5 25 20 48 71 13 Santa Clarita Vly 39 37 0.2 20 5 22 34 15 San Gabriel Mts 37 34 0.5 24 4 37 35 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 37 31 0.4 16 8 26 44 Orange County: South Coast Air Basin 16 N Orange Co 41 30 0.5 23 9 37 50 17 Central Orange Co 33 25 1.3 21 9 35 50 18 N Coastal Orange Co 38 29 1.0 21 13 48 58 19 Saddleback Vly 41 36 0.5 23 6 35 33 20 Central Coastal 37 32 0.7 18 9 33 50 21 Capistrano Vly 38 34 0.4 16 6 27 33 Riverside County: South Coast Air Basin 22 Norco/Corona 36 32 0.8 26 10 35 53 23 Metro Riverside Co 36 33 0.7 30 12 35 56 24 Perris Vly 38 33 0.6 22 6 29 33 25 Lake Elsinore 42 35 0.2 15 3 25 32 26 Temecula Vly 38 36 0.3 15 1 23 33 27 Anza Vly 41 39 0.3 15 2 22 36 28 Hemet/San Jacinto 41 38 0.6 20 3 24 35 29 Banning 43 41 0.6 19 3 15 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 31 8 22 44 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 36 33 0.2 17 3 19 31 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 49 43 0.7 12 6 37 40 33 SW San Bernardino Vly 37 32 0.9 26 9 38 50 34 C San Bernardino Vly 40 35 0.7 25 8 30 44 35 E San Bernardino Vly 37 32 0.7 23 6 30 33 36 W San Bernardino Mtns 43 39 0.6 16 5 33 36 37 C San Bernardino Mtns 41 36 0.7 24 7 32 39 38 Big Bear Lake 43 40 0.7 21 10 29 53 San Bernardino County: Mojave Desert Air Basin 39 Phelan 41 41 0.5 17 6 32 38 40 Hesperia 36 30 0.6 19 8 33 44 41 Trona 27 25 0.3 15 2 15 23 42 Victorville 36 31 0.5 18 9 34 50 43 Yucca Vly 44 43 0.4 21 4 26 40 44 Barstow 38 32 0.4 15 5 40 38 45 Twentynine Palms 37 34 0.3 20 5 25 31 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON TUE., DEC. 30, 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 Central Mojave Desert AQI: 40 Ozone Coachella Valley/Low Desert AQI: 44 PM2.5 Hemet/Elsinore Area AQI: 35 Ozone Inland Orange County AQI: 50 PM2.5 Northern Mojave Desert AQI: 38 NO2 San Bernardino Mountains AQI: 39 PM2.5 San Bernardino Valley AQI: 50 PM2.5 San Fernando/Santa Clarita Valleys AQI: 41 NO2 San Gabriel Mountains AQI: 35 NO2 San Gabriel Valley AQI: 44 PM2.5 Temecula/Anza Area AQI: 36 Ozone Victor Valley AQI: 50 PM2.5 MODERATE in the following area(s): Big Bear Lake AQI: 53 PM2.5 Coastal Area AQI: 66 PM2.5 Metropolitan Area AQI: 71 PM2.5 Riverside Valley AQI: 56 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Tuesday will be cloudy and not as windy compared to Monday, as a Pacific low pressure system moves ashore. Santa Ana winds will continue but not as strongly. Temperatures will warm 1-3 degrees over Monday. Inversion Base: 486 FT | Breaking Temperature: 68 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1880 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 TUESDAY, DECEMBER 30, 2025 IN THE SOUTH COAST AIR BASIN.