SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., OCT. 09, 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 59 49 1.0 33 10 23 53 2 NW Coastal LA 57 48 0.4 32 8 21 44 3 SW Coastal LA 50 42 0.2 31 8 14 44 4 S Coastal LA 50 46 0.3 29 9 26 50 5 Southeast LA Co 55 49 0.7 31 11 24 55 6 W San Fernando Vly 62 51 0.5 33 7 16 47 7 E San Fernando Vly 70 56 0.7 35 8 22 54 8 W San Gabriel Vly 60 51 0.4 38 7 19 47 9 E San Gabriel Vly 60 55 0.7 39 9 21 51 10 Pomona Walnut Vly 61 54 0.5 39 11 33 55 11 S San Gabriel Vly 56 50 0.5 35 10 24 53 12 S Central LA Co 55 48 0.6 31 12 23 56 13 Santa Clarita Vly 76 60 0.4 37 10 22 67 15 San Gabriel Mts 63 53 0.5 44 6 33 49 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 68 61 0.3 48 10 38 71 Orange County: South Coast Air Basin 16 N Orange Co 53 49 0.3 32 11 20 55 17 Central Orange Co 46 43 0.4 20 11 20 55 18 N Coastal Orange Co 50 47 0.4 24 8 24 44 19 Saddleback Vly 62 56 0.3 32 12 23 56 20 Central Coastal 56 51 0.3 23 9 21 50 21 Capistrano Vly 56 50 0.3 24 8 22 46 Riverside County: South Coast Air Basin 22 Norco/Corona 68 59 0.4 43 12 25 64 23 Metro Riverside Co 70 60 0.5 48 14 28 67 24 Perris Vly 65 56 0.4 32 11 36 55 25 Lake Elsinore 54 49 0.3 24 11 22 55 26 Temecula Vly 50 46 0.3 26 7 20 43 27 Anza Vly 43 40 0.3 29 5 21 37 28 Hemet/San Jacinto 56 51 0.3 29 5 38 47 29 Banning 56 52 0.3 30 6 42 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 56 53 0.2 32 7 21 49 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 47 43 0.2 26 5 16 40 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 63 54 0.4 38 10 29 53 33 SW San Bernardino Vly 63 55 0.5 43 13 39 58 34 C San Bernardino Vly 69 57 0.4 23 10 47 58 35 E San Bernardino Vly 72 60 0.4 32 7 39 67 36 W San Bernardino Mtns 59 51 0.4 38 7 34 47 37 C San Bernardino Mtns 68 57 0.3 34 5 37 58 38 Big Bear Lake 56 50 0.3 32 5 38 46 San Bernardino County: Mojave Desert Air Basin 39 Phelan 50 47 0.3 40 5 26 44 40 Hesperia 52 48 0.3 35 6 31 44 41 Trona 60 53 0.2 22 5 9 49 42 Victorville 52 47 0.3 38 8 20 44 43 Yucca Vly 56 51 0.2 31 5 29 47 44 Barstow 56 49 0.3 34 9 51 50 45 Twentynine Palms 48 44 0.2 30 5 26 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., OCT. 09, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 48 Ozone Big Bear Lake AQI: 46 Ozone Central Mojave Desert AQI: 47 Ozone Coachella Valley/Low Desert AQI: 49 Ozone Coastal Area AQI: 50 PM2.5 Northern Mojave Desert AQI: 50 PM2.5 San Gabriel Mountains AQI: 49 Ozone Temecula/Anza Area AQI: 43 Ozone Victor Valley AQI: 44 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 71 Ozone Hemet/Elsinore Area AQI: 55 PM2.5 Inland Orange County AQI: 56 PM2.5 Metropolitan Area AQI: 56 PM2.5 Riverside Valley AQI: 67 Ozone San Bernardino Mountains AQI: 58 Ozone San Bernardino Valley AQI: 67 Ozone San Fernando/Santa Clarita Valleys AQI: 67 Ozone San Gabriel Valley AQI: 55 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Thursday will be humid and unsettled as tropical moisture from Hurricane Priscilla brings showers and possible thunderstorms, mainly over the mountains and deserts. Temperatures will be slightly cooler by day and 15 to 20 degrees above average at night. Inversion Base: 1519 FT | Breaking Temperature: 80 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2299 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, OCTOBER 09, 2025 IN THE SOUTH COAST AIR BASIN.