SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: TUE., SEP. 01, 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 61 53 0.6 23 12 29 56 2 NW Coastal LA 51 44 0.3 22 10 17 53 3 SW Coastal LA 46 41 0.3 23 10 13 53 4 S Coastal LA 49 45 0.2 25 9 23 50 5 Southeast LA Co 53 48 0.5 28 10 27 53 6 W San Fernando Vly 57 49 0.3 21 10 17 53 7 E San Fernando Vly 60 53 0.4 24 11 22 55 8 W San Gabriel Vly 65 55 0.3 29 11 16 55 9 E San Gabriel Vly 68 59 0.5 37 11 31 64 10 Pomona Walnut Vly 66 58 0.5 39 12 28 61 11 S San Gabriel Vly 59 52 0.4 32 12 27 56 12 S Central LA Co 52 46 0.4 24 10 22 53 13 Santa Clarita Vly 71 63 0.3 21 10 18 77 15 San Gabriel Mts 64 57 0.4 37 9 27 58 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 56 53 0.3 18 11 15 55 Orange County: South Coast Air Basin 16 N Orange Co 56 52 0.2 37 10 21 53 17 Central Orange Co 46 43 0.4 26 10 15 53 18 N Coastal Orange Co 47 44 0.3 26 9 21 50 19 Saddleback Vly 51 48 0.2 37 10 19 53 20 Central Coastal 49 47 0.3 26 9 17 50 21 Capistrano Vly 50 48 0.3 30 9 16 50 Riverside County: South Coast Air Basin 22 Norco/Corona 63 56 0.4 49 12 22 56 23 Metro Riverside Co 69 60 0.6 54 14 22 67 24 Perris Vly 60 56 0.4 41 10 25 54 25 Lake Elsinore 55 53 0.3 27 9 16 50 26 Temecula Vly 48 45 0.3 38 7 15 42 27 Anza Vly 47 46 0.2 44 4 14 43 28 Hemet/San Jacinto 55 51 0.3 37 5 23 47 29 Banning 65 57 0.3 34 4 15 58 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 59 54 0.2 54 5 12 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 39 37 0.2 35 4 13 34 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 64 56 0.6 37 12 34 56 33 SW San Bernardino Vly 65 57 0.5 49 13 32 58 34 C San Bernardino Vly 69 60 0.4 42 11 35 67 35 E San Bernardino Vly 72 63 0.5 44 8 27 77 36 W San Bernardino Mtns 65 58 0.4 37 8 30 61 37 C San Bernardino Mtns 69 58 0.4 40 5 29 61 38 Big Bear Lake 65 59 0.3 37 4 25 64 San Bernardino County: Mojave Desert Air Basin 39 Phelan 66 62 0.3 30 5 21 74 40 Hesperia 61 56 0.3 30 7 26 54 41 Trona 57 54 0.2 49 6 53 50 42 Victorville 58 55 0.3 30 9 18 51 43 Yucca Vly 71 59 0.2 35 4 18 64 44 Barstow 59 55 0.3 33 9 33 51 45 Twentynine Palms 54 50 0.2 35 4 18 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON TUE., SEP. 01, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coachella Valley/Low Desert AQI: 50 Ozone Temecula/Anza Area AQI: 43 Ozone MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Banning Pass Area AQI: 58 Ozone Big Bear Lake AQI: 64 Ozone Central Mojave Desert AQI: 64 Ozone Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 54 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 56 PM2.5 Northern Mojave Desert AQI: 51 Ozone Riverside Valley AQI: 67 Ozone San Bernardino Mountains AQI: 61 Ozone San Bernardino Valley AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 77 Ozone San Gabriel Mountains AQI: 58 Ozone San Gabriel Valley AQI: 64 Ozone Victor Valley AQI: 74 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The cooling trend will continue, with temperatures lower than average throughout the region. Light onshore flow is expected. Inversion Base: 2294 FT | Breaking Temperature: 83 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2434 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 01, 2026 IN THE SOUTH COAST AIR BASIN.