SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., SEP. 10, 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 69 60 0.7 33 12 29 67 2 NW Coastal LA 57 50 0.4 32 10 18 53 3 SW Coastal LA 40 35 0.2 35 10 12 53 4 S Coastal LA 46 42 0.3 44 9 26 50 5 Southeast LA Co 59 51 0.5 45 10 27 53 6 W San Fernando Vly 68 62 0.3 30 9 20 74 7 E San Fernando Vly 75 65 0.5 33 12 24 84 8 W San Gabriel Vly 74 63 0.4 38 12 19 77 9 E San Gabriel Vly 78 68 0.5 40 10 30 93 10 Pomona Walnut Vly 75 63 0.4 49 11 32 77 11 S San Gabriel Vly 72 61 0.4 46 11 27 71 12 S Central LA Co 54 47 0.2 39 10 17 53 13 Santa Clarita Vly 70 66 0.3 30 10 24 87 15 San Gabriel Mts 76 69 0.4 40 11 31 97 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 68 64 0.3 27 11 26 80 Orange County: South Coast Air Basin 16 N Orange Co 64 56 0.2 53 9 14 54 17 Central Orange Co 50 45 0.3 48 10 23 53 18 N Coastal Orange Co 46 43 0.3 43 7 25 40 19 Saddleback Vly 53 48 0.2 53 5 23 49 20 Central Coastal 49 46 0.3 41 6 21 43 21 Capistrano Vly 50 46 0.3 37 7 19 43 Riverside County: South Coast Air Basin 22 Norco/Corona 71 61 0.4 61 9 24 71 23 Metro Riverside Co 78 66 0.5 68 12 24 87 24 Perris Vly 70 65 0.4 45 10 28 84 25 Lake Elsinore 63 58 0.3 35 7 19 61 26 Temecula Vly 53 50 0.2 36 8 17 46 27 Anza Vly 59 55 0.2 37 7 14 51 28 Hemet/San Jacinto 67 62 0.3 39 9 27 74 29 Banning 77 67 0.3 36 7 22 90 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 77 68 0.2 44 7 11 93 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 43 40 0.2 34 5 12 37 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 75 66 0.4 34 12 33 87 33 SW San Bernardino Vly 73 63 0.4 61 11 34 77 34 C San Bernardino Vly 79 69 0.4 42 11 37 97 35 E San Bernardino Vly 75 68 0.4 44 10 31 93 36 W San Bernardino Mtns 77 68 0.4 35 11 40 93 37 C San Bernardino Mtns 80 70 0.4 39 7 43 100 38 Big Bear Lake 68 61 0.4 38 5 31 71 San Bernardino County: Mojave Desert Air Basin 39 Phelan 66 61 0.3 30 8 46 71 40 Hesperia 67 61 0.4 24 9 48 71 41 Trona 52 49 0.2 26 5 12 45 42 Victorville 73 65 0.3 29 10 51 84 43 Yucca Vly 61 53 0.3 38 5 18 49 44 Barstow 60 56 0.3 36 8 34 54 45 Twentynine Palms 64 55 0.2 37 5 17 51 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., SEP. 10, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 80 Ozone Banning Pass Area AQI: 90 Ozone Big Bear Lake AQI: 71 Ozone Central Mojave Desert AQI: 51 Ozone Coachella Valley/Low Desert AQI: 93 Ozone Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 84 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 67 Ozone Northern Mojave Desert AQI: 54 Ozone Riverside Valley AQI: 87 Ozone San Bernardino Mountains AQI: 100 Ozone San Bernardino Valley AQI: 97 Ozone San Fernando/Santa Clarita Valleys AQI: 87 Ozone San Gabriel Mountains AQI: 97 Ozone San Gabriel Valley AQI: 93 Ozone Temecula/Anza Area AQI: 51 Ozone Victor Valley AQI: 84 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Temperatures will gradually cool starting Thursday, but SoCal will still be more than 10 degrees above normal. Skies will start off as partly cloudy before becoming mostly sunny. Winds could gust up to 25 mph in the Inland Empire and lower deserts in the afternoon and evening. Inversion Base: 847 FT | Breaking Temperature: 88 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2015 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-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, SEPTEMBER 10, 2026 IN THE SOUTH COAST AIR BASIN.