SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., OCT. 31, 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 49 45 0.6 18 6 25 42 2 NW Coastal LA 42 39 0.3 17 5 18 36 3 SW Coastal LA 42 39 0.3 18 6 20 36 4 S Coastal LA 49 46 0.4 20 7 23 43 5 Southeast LA Co 44 41 0.6 21 7 23 39 6 W San Fernando Vly 43 41 0.5 15 5 13 38 7 E San Fernando Vly 51 47 0.5 18 5 21 44 8 W San Gabriel Vly 48 46 0.3 18 5 18 43 9 E San Gabriel Vly 46 43 0.3 15 4 21 40 10 Pomona Walnut Vly 47 42 0.4 30 6 26 39 11 S San Gabriel Vly 43 40 0.5 21 6 23 37 12 S Central LA Co 42 39 0.6 19 7 22 39 13 Santa Clarita Vly 45 41 0.2 14 5 13 38 15 San Gabriel Mts 45 42 0.4 29 5 22 39 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 45 43 0.3 11 5 21 40 Orange County: South Coast Air Basin 16 N Orange Co 39 37 0.4 22 7 19 39 17 Central Orange Co 50 47 0.6 22 6 25 44 18 N Coastal Orange Co 47 44 0.4 20 4 23 41 19 Saddleback Vly 43 41 0.2 21 3 22 38 20 Central Coastal 45 42 0.3 16 3 18 39 21 Capistrano Vly 45 43 0.2 12 3 15 40 Riverside County: South Coast Air Basin 22 Norco/Corona 46 43 0.5 24 6 23 40 23 Metro Riverside Co 49 45 0.8 22 7 21 42 24 Perris Vly 39 38 0.5 19 6 22 35 25 Lake Elsinore 39 37 0.2 15 8 12 44 26 Temecula Vly 40 38 0.2 15 4 13 35 27 Anza Vly 42 38 0.2 18 3 15 35 28 Hemet/San Jacinto 44 41 0.4 18 5 21 38 29 Banning 46 42 0.4 17 4 16 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 48 46 0.1 44 5 17 43 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 39 38 0.2 23 4 14 35 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 43 39 0.6 38 8 26 44 33 SW San Bernardino Vly 46 42 0.5 32 8 25 44 34 C San Bernardino Vly 43 39 0.5 22 6 26 36 35 E San Bernardino Vly 45 42 0.7 21 6 24 39 36 W San Bernardino Mtns 44 40 0.4 29 6 26 37 37 C San Bernardino Mtns 48 44 0.5 24 5 27 41 38 Big Bear Lake 40 39 0.4 21 5 24 36 San Bernardino County: Mojave Desert Air Basin 39 Phelan 47 45 0.4 19 3 27 42 40 Hesperia 48 45 0.4 18 4 28 42 41 Trona 48 46 0.2 13 5 9 43 42 Victorville 46 43 0.4 19 4 28 40 43 Yucca Vly 42 41 0.2 28 3 21 38 44 Barstow 47 40 0.3 14 6 32 37 45 Twentynine Palms 40 38 0.2 27 3 19 35 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., OCT. 31, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 40 Ozone Banning Pass Area AQI: 39 Ozone Big Bear Lake AQI: 36 Ozone Central Mojave Desert AQI: 38 Ozone Coachella Valley/Low Desert AQI: 43 Ozone Coastal Area AQI: 43 Ozone Hemet/Elsinore Area AQI: 44 PM2.5 Inland Orange County AQI: 44 Ozone Metropolitan Area AQI: 42 Ozone Northern Mojave Desert AQI: 43 Ozone Riverside Valley AQI: 42 Ozone San Bernardino Mountains AQI: 41 Ozone San Bernardino Valley AQI: 44 PM2.5 San Fernando/Santa Clarita Valleys AQI: 44 Ozone San Gabriel Mountains AQI: 39 Ozone San Gabriel Valley AQI: 43 Ozone Temecula/Anza Area AQI: 35 Ozone Victor Valley AQI: 42 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Showers are likely on Saturday, and temperatures will drop another 1-3 degrees below Friday. Skies will be partly cloudy most of the day and onshore (west/ southwest) winds could gust up to 25 mph in the Inland Empire and low deserts. Inversion Base: 5325 FT | Breaking Temperature: 80 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1979 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 SATURDAY, OCTOBER 31, 2026 IN THE SOUTH COAST AIR BASIN.