SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., NOV. 27, 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 27 0.8 40 16 45 64 2 NW Coastal LA 39 32 0.7 36 16 39 64 3 SW Coastal LA 39 30 1.0 38 19 36 69 4 S Coastal LA 36 26 1.4 43 23 58 77 5 Southeast LA Co 35 23 2.0 43 21 56 73 6 W San Fernando Vly 44 37 1.2 31 13 42 58 7 E San Fernando Vly 42 34 1.0 38 12 43 56 8 W San Gabriel Vly 41 33 0.9 37 12 44 56 9 E San Gabriel Vly 42 36 0.7 19 10 44 53 10 Pomona Walnut Vly 41 30 1.0 39 17 46 66 11 S San Gabriel Vly 34 22 1.1 42 17 56 66 12 S Central LA Co 37 25 2.0 40 23 51 77 13 Santa Clarita Vly 45 39 0.3 30 8 23 44 15 San Gabriel Mts 43 38 0.7 35 8 41 44 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 43 34 0.6 22 11 30 55 Orange County: South Coast Air Basin 16 N Orange Co 32 24 1.1 45 22 43 75 17 Central Orange Co 35 28 1.4 45 23 51 77 18 N Coastal Orange Co 41 33 1.3 40 27 54 84 19 Saddleback Vly 45 39 0.6 37 10 45 53 20 Central Coastal 42 36 0.8 32 18 40 68 21 Capistrano Vly 42 37 0.6 22 14 32 60 Riverside County: South Coast Air Basin 22 Norco/Corona 41 33 1.0 36 20 45 71 23 Metro Riverside Co 41 32 1.0 37 20 43 71 24 Perris Vly 41 34 0.9 38 10 36 53 25 Lake Elsinore 45 39 0.6 15 7 26 39 26 Temecula Vly 45 38 0.5 27 4 26 35 27 Anza Vly 46 42 0.4 31 5 28 39 28 Hemet/San Jacinto 46 41 0.8 35 5 34 38 29 Banning 46 44 0.8 32 4 35 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 44 42 0.3 38 18 30 68 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 37 32 0.3 27 8 25 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 38 31 0.7 30 14 49 60 33 SW San Bernardino Vly 39 29 1.1 39 21 47 73 34 C San Bernardino Vly 40 33 1.1 45 10 41 53 35 E San Bernardino Vly 41 35 1.0 41 10 38 53 36 W San Bernardino Mtns 42 36 0.9 30 8 41 44 37 C San Bernardino Mtns 43 39 1.0 41 7 35 39 38 Big Bear Lake 48 45 0.9 37 12 34 56 San Bernardino County: Mojave Desert Air Basin 39 Phelan 50 47 0.8 23 8 35 44 40 Hesperia 37 31 0.8 22 10 35 53 41 Trona 29 25 0.4 16 4 19 23 42 Victorville 39 33 0.8 25 13 34 58 43 Yucca Vly 46 44 0.5 29 9 32 50 44 Barstow 39 27 0.6 31 7 40 39 45 Twentynine Palms 40 36 0.4 29 9 30 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., NOV. 27, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 41 Ozone Central Mojave Desert AQI: 50 PM2.5 Northern Mojave Desert AQI: 39 PM2.5 San Bernardino Mountains AQI: 44 PM2.5 San Gabriel Mountains AQI: 44 PM2.5 Temecula/Anza Area AQI: 39 Ozone MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Big Bear Lake AQI: 56 PM2.5 Coachella Valley/Low Desert AQI: 68 PM2.5 Coastal Area AQI: 84 PM2.5 Hemet/Elsinore Area AQI: 53 PM2.5 Inland Orange County AQI: 77 PM2.5 Metropolitan Area AQI: 77 PM2.5 Riverside Valley AQI: 71 PM2.5 San Bernardino Valley AQI: 73 PM2.5 San Fernando/Santa Clarita Valleys AQI: 58 PM2.5 San Gabriel Valley AQI: 66 PM2.5 Victor Valley AQI: 58 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Slight cooling with highs a few degrees lower than Wednesday. Light offshore winds continue but weaker than Wednesday. Mid and high clouds increase. Dry weather expected. Inversion Base: 486 FT | Breaking Temperature: 76 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1550 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 THURSDAY, NOVEMBER 27, 2025 IN THE SOUTH COAST AIR BASIN.