SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., OCT. 03, 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 45 41 0.7 32 7 22 39 2 NW Coastal LA 43 39 0.3 29 8 14 44 3 SW Coastal LA 38 36 0.3 30 8 12 44 4 S Coastal LA 40 38 0.3 28 8 25 44 5 Southeast LA Co 43 40 0.5 30 8 27 44 6 W San Fernando Vly 50 46 0.3 27 8 13 44 7 E San Fernando Vly 51 46 0.5 31 8 17 44 8 W San Gabriel Vly 46 43 0.3 31 8 12 44 9 E San Gabriel Vly 59 49 0.3 30 9 18 50 10 Pomona Walnut Vly 58 48 0.3 30 9 20 50 11 S San Gabriel Vly 45 41 0.4 31 8 27 44 12 S Central LA Co 42 40 0.4 30 8 17 44 13 Santa Clarita Vly 58 51 0.2 25 8 16 47 15 San Gabriel Mts 53 48 0.3 30 8 15 44 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 54 50 0.2 18 7 9 46 Orange County: South Coast Air Basin 16 N Orange Co 45 41 0.2 25 8 12 44 17 Central Orange Co 38 36 0.3 17 8 14 44 18 N Coastal Orange Co 40 39 0.3 21 7 21 39 19 Saddleback Vly 45 43 0.2 25 6 13 40 20 Central Coastal 43 41 0.2 19 6 12 38 21 Capistrano Vly 44 41 0.2 29 5 8 38 Riverside County: South Coast Air Basin 22 Norco/Corona 53 48 0.4 34 9 12 50 23 Metro Riverside Co 58 51 0.9 37 11 14 55 24 Perris Vly 47 44 0.4 35 7 16 41 25 Lake Elsinore 45 41 0.2 17 5 6 38 26 Temecula Vly 44 41 0.2 43 4 7 40 27 Anza Vly 47 44 0.2 52 4 8 48 28 Hemet/San Jacinto 50 46 0.3 34 5 15 43 29 Banning 58 50 0.2 30 6 12 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 58 53 0.2 70 4 10 58 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 46 44 0.2 36 4 8 41 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 56 48 0.3 31 10 11 53 33 SW San Bernardino Vly 56 48 0.3 34 10 17 53 34 C San Bernardino Vly 58 50 0.3 39 10 18 53 35 E San Bernardino Vly 60 53 0.6 37 8 17 49 36 W San Bernardino Mtns 57 49 0.3 31 10 17 53 37 C San Bernardino Mtns 60 56 0.3 37 7 19 54 38 Big Bear Lake 61 55 0.2 34 5 18 51 San Bernardino County: Mojave Desert Air Basin 39 Phelan 54 50 0.2 25 6 18 46 40 Hesperia 56 51 0.2 24 8 21 47 41 Trona 49 44 0.2 31 4 14 41 42 Victorville 55 51 0.2 25 8 20 47 43 Yucca Vly 60 55 0.2 28 4 15 51 44 Barstow 55 51 0.2 31 6 30 47 45 Twentynine Palms 55 51 0.2 30 4 14 47 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., OCT. 03, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 46 Ozone Banning Pass Area AQI: 46 Ozone Coastal Area AQI: 44 PM2.5 Hemet/Elsinore Area AQI: 43 Ozone Inland Orange County AQI: 44 PM2.5 Metropolitan Area AQI: 44 PM2.5 Northern Mojave Desert AQI: 47 Ozone San Fernando/Santa Clarita Valleys AQI: 47 Ozone San Gabriel Mountains AQI: 44 PM2.5 San Gabriel Valley AQI: 50 PM2.5 Temecula/Anza Area AQI: 48 PM10 Victor Valley AQI: 47 Ozone MODERATE in the following area(s): Big Bear Lake AQI: 51 Ozone Central Mojave Desert AQI: 51 Ozone Coachella Valley/Low Desert AQI: 58 PM10 Riverside Valley AQI: 55 PM2.5 San Bernardino Mountains AQI: 54 Ozone San Bernardino Valley AQI: 53 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Gusty winds in the mountains and deserts. Increasing ventilation and onshore pressure gradients. Inversion Base: 2347 FT | Breaking Temperature: 73 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2730 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 FRIDAY, OCTOBER 03, 2025 IN THE SOUTH COAST AIR BASIN.