SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., OCT. 22, 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 42 40 0.7 18 6 19 37 2 NW Coastal LA 45 41 0.3 16 5 13 38 3 SW Coastal LA 39 36 0.2 17 6 16 33 4 S Coastal LA 43 42 0.4 15 7 19 39 5 Southeast LA Co 41 39 0.5 17 7 21 39 6 W San Fernando Vly 43 41 0.3 14 6 11 38 7 E San Fernando Vly 46 43 0.5 17 6 15 40 8 W San Gabriel Vly 43 41 0.2 17 6 11 38 9 E San Gabriel Vly 46 42 0.3 12 4 28 39 10 Pomona Walnut Vly 47 41 0.3 28 6 18 38 11 S San Gabriel Vly 43 40 0.3 17 6 19 37 12 S Central LA Co 41 38 0.2 17 8 21 44 13 Santa Clarita Vly 43 39 0.2 14 4 11 36 15 San Gabriel Mts 44 40 0.2 27 5 20 37 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 43 41 0.2 15 6 20 38 Orange County: South Coast Air Basin 16 N Orange Co 42 40 0.2 18 6 16 37 17 Central Orange Co 38 37 0.3 11 6 14 34 18 N Coastal Orange Co 42 41 0.4 13 5 17 38 19 Saddleback Vly 43 41 0.2 17 4 13 38 20 Central Coastal 41 40 0.2 10 4 12 37 21 Capistrano Vly 39 38 0.2 13 4 9 35 Riverside County: South Coast Air Basin 22 Norco/Corona 44 41 0.4 24 8 15 44 23 Metro Riverside Co 45 42 0.8 25 10 14 53 24 Perris Vly 41 38 0.4 27 4 13 35 25 Lake Elsinore 43 40 0.2 12 4 7 37 26 Temecula Vly 39 37 0.2 19 3 8 34 27 Anza Vly 41 39 0.2 24 4 10 36 28 Hemet/San Jacinto 39 37 0.2 27 3 12 34 29 Banning 39 37 0.2 26 3 7 34 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 0.1 36 8 12 44 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 44 41 0.1 22 6 10 38 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 38 35 0.4 37 8 17 44 33 SW San Bernardino Vly 44 39 0.3 32 8 21 44 34 C San Bernardino Vly 41 38 0.2 34 5 25 35 35 E San Bernardino Vly 43 38 0.6 30 4 15 35 36 W San Bernardino Mtns 42 39 0.2 28 5 19 36 37 C San Bernardino Mtns 45 43 0.2 31 2 17 40 38 Big Bear Lake 45 43 0.2 29 5 17 40 San Bernardino County: Mojave Desert Air Basin 39 Phelan 46 44 0.2 14 5 15 41 40 Hesperia 45 42 0.2 11 4 16 39 41 Trona 44 40 0.1 10 3 15 37 42 Victorville 45 42 0.2 14 5 12 39 43 Yucca Vly 43 42 0.2 29 6 15 39 44 Barstow 45 41 0.2 20 5 25 38 45 Twentynine Palms 42 41 0.1 27 6 14 38 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., OCT. 22, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 38 Ozone Banning Pass Area AQI: 34 Ozone Big Bear Lake AQI: 40 Ozone Central Mojave Desert AQI: 39 Ozone Coachella Valley/Low Desert AQI: 44 PM2.5 Coastal Area AQI: 39 PM2.5 Hemet/Elsinore Area AQI: 37 Ozone Inland Orange County AQI: 38 Ozone Metropolitan Area AQI: 44 PM2.5 Northern Mojave Desert AQI: 38 Ozone San Bernardino Mountains AQI: 40 Ozone San Bernardino Valley AQI: 44 PM2.5 San Fernando/Santa Clarita Valleys AQI: 40 Ozone San Gabriel Mountains AQI: 37 Ozone San Gabriel Valley AQI: 39 Ozone Temecula/Anza Area AQI: 36 Ozone Victor Valley AQI: 41 Ozone MODERATE in the following area(s): Riverside Valley AQI: 53 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Low pressure system will continue the cooling trend through Thursday. It is also expected to produce showers and a slight chance of thunderstorms for late today through Thursday. The greater coverage is expected for Orange and southwestern San Bernardino Counties from the coast to the mountains. Inversion Base: 11443 FT | Breaking Temperature: 91 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 625 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 THURSDAY, OCTOBER 22, 2026 IN THE SOUTH COAST AIR BASIN.