SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: TUE., SEP. 08, 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 70 58 0.6 31 11 40 61 2 NW Coastal LA 58 48 0.5 28 9 13 50 3 SW Coastal LA 43 36 0.2 29 8 9 44 4 S Coastal LA 56 44 0.3 33 8 36 44 5 Southeast LA Co 68 52 0.5 34 10 31 53 6 W San Fernando Vly 60 53 0.4 26 6 22 49 7 E San Fernando Vly 63 56 0.5 31 7 29 54 8 W San Gabriel Vly 72 62 0.4 32 10 20 74 9 E San Gabriel Vly 83 68 0.5 32 9 33 93 10 Pomona Walnut Vly 85 68 0.6 38 11 43 93 11 S San Gabriel Vly 74 58 0.3 35 12 23 61 12 S Central LA Co 65 50 0.2 31 9 17 50 13 Santa Clarita Vly 66 58 0.3 28 6 26 61 15 San Gabriel Mts 67 59 0.4 32 7 31 64 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 56 54 0.4 29 10 31 53 Orange County: South Coast Air Basin 16 N Orange Co 77 60 0.2 40 10 13 67 17 Central Orange Co 62 48 0.4 35 10 26 53 18 N Coastal Orange Co 52 42 0.3 32 6 32 39 19 Saddleback Vly 59 51 0.3 40 4 28 47 20 Central Coastal 55 45 0.3 30 5 25 42 21 Capistrano Vly 58 48 0.4 28 7 22 44 Riverside County: South Coast Air Basin 22 Norco/Corona 70 60 0.5 48 9 32 67 23 Metro Riverside Co 80 66 0.6 52 11 42 87 24 Perris Vly 80 65 0.5 37 8 39 84 25 Lake Elsinore 73 62 0.4 27 7 22 74 26 Temecula Vly 56 47 0.4 27 7 19 44 27 Anza Vly 64 60 0.3 27 6 16 67 28 Hemet/San Jacinto 68 59 0.5 32 7 36 64 29 Banning 69 61 0.4 28 4 32 71 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 63 58 0.3 44 7 12 61 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 43 40 0.3 28 4 12 37 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 82 67 0.5 35 12 34 90 33 SW San Bernardino Vly 77 64 0.5 48 11 39 80 34 C San Bernardino Vly 86 66 0.5 38 9 40 87 35 E San Bernardino Vly 81 68 0.6 38 7 40 93 36 W San Bernardino Mtns 86 70 0.5 32 8 36 100 37 C San Bernardino Mtns 86 69 0.5 35 5 38 97 38 Big Bear Lake 52 48 0.5 32 4 36 44 San Bernardino County: Mojave Desert Air Basin 39 Phelan 62 58 0.4 26 6 33 61 40 Hesperia 59 57 0.5 19 6 36 58 41 Trona 48 42 0.3 15 4 9 39 42 Victorville 56 54 0.4 26 8 34 50 43 Yucca Vly 46 43 0.3 33 4 22 40 44 Barstow 53 49 0.4 31 6 45 45 45 Twentynine Palms 45 43 0.3 33 4 19 40 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON TUE., SEP. 08, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Big Bear Lake AQI: 44 Ozone Central Mojave Desert AQI: 40 Ozone Coastal Area AQI: 50 PM2.5 Northern Mojave Desert AQI: 45 Ozone MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Banning Pass Area AQI: 71 Ozone Coachella Valley/Low Desert AQI: 61 Ozone Hemet/Elsinore Area AQI: 84 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 67 Ozone Riverside Valley AQI: 87 Ozone San Bernardino Mountains AQI: 100 Ozone San Bernardino Valley AQI: 93 Ozone San Fernando/Santa Clarita Valleys AQI: 61 Ozone San Gabriel Mountains AQI: 64 Ozone San Gabriel Valley AQI: 93 Ozone Temecula/Anza Area AQI: 67 Ozone Victor Valley AQI: 61 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ As high pressure rebuilds over SoCal, temperatures will warm 1-3 degrees over Monday. Skies will start out partly cloudy and become mostly sunny. Due to lingering moisture, humidity will remain high. Winds will be light to moderate. Inversion Base: 486 FT | Breaking Temperature: 86 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1324 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 TUESDAY, SEPTEMBER 08, 2026 IN THE SOUTH COAST AIR BASIN.