SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., SEP. 03, 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 51 45 0.8 32 12 18 56 2 NW Coastal LA 42 39 0.3 29 8 11 44 3 SW Coastal LA 40 37 0.2 29 8 10 44 4 S Coastal LA 40 38 0.3 26 8 14 44 5 Southeast LA Co 44 41 0.6 29 9 18 50 6 W San Fernando Vly 57 51 0.3 27 9 13 50 7 E San Fernando Vly 55 51 0.6 31 11 16 55 8 W San Gabriel Vly 58 50 0.4 32 11 14 55 9 E San Gabriel Vly 60 52 0.3 33 12 19 56 10 Pomona Walnut Vly 58 51 0.4 37 11 20 55 11 S San Gabriel Vly 49 45 0.3 31 10 18 53 12 S Central LA Co 41 40 0.3 29 8 12 44 13 Santa Clarita Vly 67 58 0.3 29 10 14 61 15 San Gabriel Mts 60 54 0.4 37 11 16 55 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 65 60 0.3 30 11 13 67 Orange County: South Coast Air Basin 16 N Orange Co 44 41 0.1 28 8 10 44 17 Central Orange Co 38 36 0.3 14 7 7 39 18 N Coastal Orange Co 39 37 0.2 19 6 13 34 19 Saddleback Vly 41 39 0.2 28 5 14 36 20 Central Coastal 39 37 0.3 20 5 14 34 21 Capistrano Vly 38 37 0.3 24 5 15 34 Riverside County: South Coast Air Basin 22 Norco/Corona 53 49 0.4 40 8 15 45 23 Metro Riverside Co 60 54 0.7 44 11 14 55 24 Perris Vly 52 48 0.4 41 8 21 44 25 Lake Elsinore 50 45 0.3 21 7 16 42 26 Temecula Vly 47 42 0.3 32 5 14 39 27 Anza Vly 50 47 0.2 37 5 13 44 28 Hemet/San Jacinto 51 47 0.3 36 5 21 44 29 Banning 55 52 0.3 33 5 17 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 56 0.2 47 5 13 54 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 51 49 0.2 28 5 10 45 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 62 55 0.4 40 10 15 53 33 SW San Bernardino Vly 56 50 0.4 42 10 20 53 34 C San Bernardino Vly 66 58 0.3 44 9 28 61 35 E San Bernardino Vly 64 58 0.5 42 7 24 61 36 W San Bernardino Mtns 64 57 0.3 38 9 19 58 37 C San Bernardino Mtns 70 61 0.3 41 5 25 71 38 Big Bear Lake 55 52 0.3 37 5 23 48 San Bernardino County: Mojave Desert Air Basin 39 Phelan 64 60 0.3 31 5 14 67 40 Hesperia 59 55 0.3 28 6 20 51 41 Trona 50 47 0.2 31 7 17 44 42 Victorville 65 62 0.3 29 7 12 74 43 Yucca Vly 58 53 0.2 28 5 15 49 44 Barstow 67 61 0.2 26 7 24 71 45 Twentynine Palms 54 52 0.2 28 5 14 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., SEP. 03, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 48 Ozone Big Bear Lake AQI: 48 Ozone Central Mojave Desert AQI: 49 Ozone Coastal Area AQI: 44 PM2.5 Hemet/Elsinore Area AQI: 44 PM2.5 Inland Orange County AQI: 39 PM2.5 Temecula/Anza Area AQI: 44 Ozone MODERATE in the following area(s): Antelope Valley AQI: 67 Ozone Coachella Valley/Low Desert AQI: 54 Ozone Metropolitan Area AQI: 56 PM2.5 Northern Mojave Desert AQI: 71 Ozone Riverside Valley AQI: 55 PM2.5 San Bernardino Mountains AQI: 71 Ozone San Bernardino Valley AQI: 61 Ozone San Fernando/Santa Clarita Valleys AQI: 61 Ozone San Gabriel Mountains AQI: 55 PM2.5 San Gabriel Valley AQI: 56 PM2.5 Victor Valley AQI: 74 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Temperatures and winds will be similar to the previous few days, with temperatures at or a few degrees below average. Winds are expected to be mild. Inversion Base: 486 FT | Breaking Temperature: 68 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2581 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 THURSDAY, SEPTEMBER 03, 2026 IN THE SOUTH COAST AIR BASIN.