SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., SEP. 05, 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 57 54 0.7 31 11 23 55 2 NW Coastal LA 50 46 0.5 30 9 15 50 3 SW Coastal LA 47 44 0.3 35 8 18 44 4 S Coastal LA 43 42 0.4 47 8 22 44 5 Southeast LA Co 53 51 0.8 48 9 25 50 6 W San Fernando Vly 55 53 0.4 27 7 15 49 7 E San Fernando Vly 56 54 0.6 30 9 19 50 8 W San Gabriel Vly 66 60 0.4 34 10 16 67 9 E San Gabriel Vly 68 65 0.5 30 9 26 84 10 Pomona Walnut Vly 69 64 0.5 48 9 24 80 11 S San Gabriel Vly 59 56 0.5 46 10 25 54 12 S Central LA Co 50 49 0.8 39 9 21 50 13 Santa Clarita Vly 64 63 0.3 26 8 16 77 15 San Gabriel Mts 61 61 0.4 35 8 23 71 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 60 64 0.3 21 10 14 80 Orange County: South Coast Air Basin 16 N Orange Co 54 51 0.2 53 9 14 50 17 Central Orange Co 49 48 0.5 53 9 17 50 18 N Coastal Orange Co 45 45 0.4 46 6 20 43 19 Saddleback Vly 50 53 0.3 49 5 18 49 20 Central Coastal 48 50 0.3 42 5 15 46 21 Capistrano Vly 47 48 0.4 35 5 13 44 Riverside County: South Coast Air Basin 22 Norco/Corona 61 61 0.5 53 8 21 71 23 Metro Riverside Co 67 66 0.6 55 10 22 87 24 Perris Vly 55 59 0.5 42 7 23 64 25 Lake Elsinore 50 55 0.4 31 6 11 51 26 Temecula Vly 48 50 0.3 32 5 13 46 27 Anza Vly 46 48 0.3 34 7 15 44 28 Hemet/San Jacinto 49 54 0.4 37 5 21 50 29 Banning 53 58 0.4 33 4 16 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 51 54 0.3 38 8 17 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 44 44 0.2 28 11 15 55 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 65 63 0.5 39 9 25 77 33 SW San Bernardino Vly 64 62 0.5 53 9 28 74 34 C San Bernardino Vly 66 68 0.6 43 8 30 93 35 E San Bernardino Vly 65 69 0.5 43 7 24 97 36 W San Bernardino Mtns 63 63 0.4 36 7 29 77 37 C San Bernardino Mtns 69 70 0.4 40 5 30 100 38 Big Bear Lake 51 55 0.4 37 7 29 51 San Bernardino County: Mojave Desert Air Basin 39 Phelan 54 59 0.4 26 6 30 64 40 Hesperia 58 63 0.4 23 6 32 77 41 Trona 52 57 0.2 27 6 25 58 42 Victorville 64 70 0.4 28 7 32 100 43 Yucca Vly 55 57 0.3 30 10 25 58 44 Barstow 62 66 0.3 37 9 46 87 45 Twentynine Palms 47 50 0.3 29 10 23 53 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., SEP. 05, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 50 PM2.5 Inland Orange County AQI: 50 PM2.5 Temecula/Anza Area AQI: 46 Ozone MODERATE in the following area(s): Antelope Valley AQI: 80 Ozone Banning Pass Area AQI: 61 Ozone Big Bear Lake AQI: 51 Ozone Central Mojave Desert AQI: 58 Ozone Coachella Valley/Low Desert AQI: 55 PM2.5 Hemet/Elsinore Area AQI: 64 Ozone Metropolitan Area AQI: 55 PM2.5 Northern Mojave Desert AQI: 87 Ozone Riverside Valley AQI: 87 Ozone San Bernardino Mountains AQI: 100 Ozone San Bernardino Valley AQI: 97 Ozone San Fernando/Santa Clarita Valleys AQI: 77 Ozone San Gabriel Mountains AQI: 71 Ozone San Gabriel Valley AQI: 84 Ozone Victor Valley AQI: 100 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Saturday will be warmer than Friday with partly cloudy to mostly sunny skies throughout the region. Onshore flow will persist. Inversion Base: 486 FT | Breaking Temperature: 73 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2329 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, SEPTEMBER 05, 2026 IN THE SOUTH COAST AIR BASIN.