SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., OCT. 23, 2026 -------------------------------------------------------------------------------- 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 44 40 0.7 18 7 27 39 2 NW Coastal LA 43 41 0.4 17 7 22 39 3 SW Coastal LA 38 36 0.6 17 6 17 33 4 S Coastal LA 44 41 0.4 17 6 25 38 5 Southeast LA Co 43 39 0.6 18 8 27 44 6 W San Fernando Vly 46 41 0.6 15 7 20 39 7 E San Fernando Vly 50 43 0.5 18 7 23 40 8 W San Gabriel Vly 49 42 0.3 18 6 19 39 9 E San Gabriel Vly 54 46 0.4 16 4 18 43 10 Pomona Walnut Vly 52 43 0.4 32 7 30 40 11 S San Gabriel Vly 45 39 0.5 19 7 27 39 12 S Central LA Co 42 39 0.5 18 8 24 44 13 Santa Clarita Vly 47 42 0.3 16 5 17 39 15 San Gabriel Mts 47 42 0.4 31 5 26 39 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 46 42 0.3 15 5 30 39 Orange County: South Coast Air Basin 16 N Orange Co 46 40 0.2 22 8 20 44 17 Central Orange Co 42 37 0.5 18 8 25 44 18 N Coastal Orange Co 43 40 0.4 17 4 24 37 19 Saddleback Vly 46 43 0.2 21 4 22 40 20 Central Coastal 44 42 0.3 14 4 18 39 21 Capistrano Vly 45 43 0.2 15 4 15 40 Riverside County: South Coast Air Basin 22 Norco/Corona 47 44 0.5 28 8 22 44 23 Metro Riverside Co 51 45 0.9 28 9 22 50 24 Perris Vly 43 40 0.5 21 6 25 37 25 Lake Elsinore 45 42 0.2 16 7 12 39 26 Temecula Vly 42 40 0.2 21 3 12 37 27 Anza Vly 44 42 0.2 25 4 12 39 28 Hemet/San Jacinto 44 40 0.3 20 4 26 37 29 Banning 46 42 0.3 19 4 25 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 50 46 0.2 44 7 12 43 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 42 40 0.2 25 5 13 37 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 42 37 0.6 40 8 22 44 33 SW San Bernardino Vly 49 43 0.4 35 9 27 50 34 C San Bernardino Vly 47 40 0.4 25 7 28 39 35 E San Bernardino Vly 50 43 0.7 23 7 27 40 36 W San Bernardino Mtns 43 39 0.3 31 6 26 36 37 C San Bernardino Mtns 44 40 0.3 25 5 29 37 38 Big Bear Lake 46 44 0.3 21 6 27 41 San Bernardino County: Mojave Desert Air Basin 39 Phelan 47 46 0.3 19 4 28 43 40 Hesperia 46 42 0.3 17 5 30 39 41 Trona 41 39 0.2 12 3 11 36 42 Victorville 49 44 0.3 18 6 29 41 43 Yucca Vly 45 44 0.2 28 5 20 41 44 Barstow 45 44 0.3 12 5 37 41 45 Twentynine Palms 44 43 0.2 27 5 18 40 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., OCT. 23, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 39 Ozone Banning Pass Area AQI: 39 Ozone Big Bear Lake AQI: 41 Ozone Central Mojave Desert AQI: 41 Ozone Coachella Valley/Low Desert AQI: 43 Ozone Coastal Area AQI: 39 PM2.5 Hemet/Elsinore Area AQI: 39 PM2.5 Inland Orange County AQI: 44 PM2.5 Metropolitan Area AQI: 44 PM2.5 Northern Mojave Desert AQI: 41 Ozone Riverside Valley AQI: 50 PM2.5 San Bernardino Mountains AQI: 37 Ozone San Bernardino Valley AQI: 50 PM2.5 San Fernando/Santa Clarita Valleys AQI: 40 Ozone San Gabriel Mountains AQI: 39 Ozone San Gabriel Valley AQI: 43 Ozone Temecula/Anza Area AQI: 39 Ozone Victor Valley AQI: 43 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Ligth showers will continue through late Friday afternoon. High temperatures on Friday will be a few degrees warmer for the coast to the mountains. Inversion Base: 9636 FT | Breaking Temperature: 87 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 4762 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 FRIDAY, OCTOBER 23, 2026 IN THE SOUTH COAST AIR BASIN.