SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., SEP. 07, 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 64 48 0.7 28 9 30 50 2 NW Coastal LA 54 44 0.3 27 8 11 44 3 SW Coastal LA 47 38 0.2 27 7 9 39 4 S Coastal LA 55 41 0.2 27 7 22 39 5 Southeast LA Co 64 46 0.5 28 10 25 53 6 W San Fernando Vly 57 50 0.3 25 5 20 46 7 E San Fernando Vly 60 50 0.5 28 6 24 46 8 W San Gabriel Vly 69 53 0.4 29 7 18 49 9 E San Gabriel Vly 83 65 0.6 31 8 25 84 10 Pomona Walnut Vly 81 62 0.5 38 10 31 74 11 S San Gabriel Vly 66 49 0.3 30 11 23 55 12 S Central LA Co 63 46 0.2 27 8 15 44 13 Santa Clarita Vly 60 52 0.3 26 6 18 48 15 San Gabriel Mts 63 53 0.4 34 6 25 49 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 56 49 0.3 24 9 29 50 Orange County: South Coast Air Basin 16 N Orange Co 68 51 0.2 36 10 16 53 17 Central Orange Co 56 42 0.5 25 9 21 50 18 N Coastal Orange Co 53 40 0.3 25 6 21 37 19 Saddleback Vly 58 49 0.2 36 3 21 45 20 Central Coastal 55 44 0.2 24 6 19 41 21 Capistrano Vly 56 46 0.3 24 7 19 43 Riverside County: South Coast Air Basin 22 Norco/Corona 71 59 0.4 48 9 24 64 23 Metro Riverside Co 77 63 0.5 53 10 31 77 24 Perris Vly 69 59 0.4 39 9 29 64 25 Lake Elsinore 71 57 0.3 24 7 19 58 26 Temecula Vly 51 45 0.3 27 5 16 42 27 Anza Vly 54 51 0.2 29 5 14 47 28 Hemet/San Jacinto 64 56 0.3 35 6 25 54 29 Banning 67 60 0.3 32 5 19 67 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 57 52 0.2 43 8 10 48 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 38 36 0.2 29 3 11 33 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 76 61 0.5 38 9 24 71 33 SW San Bernardino Vly 75 60 0.5 48 10 28 67 34 C San Bernardino Vly 80 67 0.4 44 8 30 90 35 E San Bernardino Vly 77 66 0.5 41 7 29 87 36 W San Bernardino Mtns 70 60 0.4 35 6 28 67 37 C San Bernardino Mtns 73 66 0.4 40 4 29 87 38 Big Bear Lake 55 49 0.4 36 4 27 45 San Bernardino County: Mojave Desert Air Basin 39 Phelan 51 47 0.4 26 5 28 44 40 Hesperia 65 55 0.4 21 5 30 51 41 Trona 51 45 0.2 19 3 11 42 42 Victorville 72 59 0.3 23 7 29 64 43 Yucca Vly 52 47 0.3 31 5 20 44 44 Barstow 56 54 0.3 20 6 43 50 45 Twentynine Palms 43 42 0.2 31 4 18 39 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., SEP. 07, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 50 PM2.5 Big Bear Lake AQI: 45 Ozone Central Mojave Desert AQI: 44 Ozone Coachella Valley/Low Desert AQI: 48 Ozone Coastal Area AQI: 44 PM2.5 Inland Orange County AQI: 50 PM2.5 Northern Mojave Desert AQI: 50 Ozone San Fernando/Santa Clarita Valleys AQI: 48 Ozone San Gabriel Mountains AQI: 49 Ozone Temecula/Anza Area AQI: 47 Ozone MODERATE in the following area(s): Banning Pass Area AQI: 67 Ozone Hemet/Elsinore Area AQI: 64 Ozone Metropolitan Area AQI: 53 PM2.5 Riverside Valley AQI: 77 Ozone San Bernardino Mountains AQI: 87 Ozone San Bernardino Valley AQI: 90 Ozone San Gabriel Valley AQI: 84 Ozone Victor Valley AQI: 64 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Rain will mostly cease on Monday and temperatures will warm to around seasonal norms as the clouds from Tropical Cyclone Marie dissipate. Winds will be moderate on shore. Inversion Base: 486 FT | Breaking Temperature: 83 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1148 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 MONDAY, SEPTEMBER 07, 2026 IN THE SOUTH COAST AIR BASIN.