SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., OCT. 04, 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 69 63 0.5 32 10 36 77 2 NW Coastal LA 68 59 0.6 30 10 30 64 3 SW Coastal LA 53 46 0.4 31 14 19 60 4 S Coastal LA 72 65 0.6 31 12 37 84 5 Southeast LA Co 73 67 0.8 32 10 33 90 6 W San Fernando Vly 68 60 0.6 29 7 21 67 7 E San Fernando Vly 62 58 0.6 33 7 31 61 8 W San Gabriel Vly 77 71 0.5 33 7 28 101 9 E San Gabriel Vly 79 75 0.5 26 2 23 115 10 Pomona Walnut Vly 82 71 0.6 37 8 34 101 11 S San Gabriel Vly 72 67 0.6 32 8 33 90 12 S Central LA Co 75 69 0.8 32 11 20 97 13 Santa Clarita Vly 72 63 0.4 32 6 16 77 15 San Gabriel Mts 70 65 0.5 34 6 27 84 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 59 57 0.4 36 9 30 58 Orange County: South Coast Air Basin 16 N Orange Co 81 70 0.4 40 10 21 100 17 Central Orange Co 77 67 0.7 31 11 33 90 18 N Coastal Orange Co 80 69 0.6 30 12 35 97 19 Saddleback Vly 79 73 0.5 40 6 31 108 20 Central Coastal 84 70 0.5 29 12 27 100 21 Capistrano Vly 81 70 0.4 36 13 22 100 Riverside County: South Coast Air Basin 22 Norco/Corona 76 71 0.6 50 9 34 101 23 Metro Riverside Co 83 76 0.8 55 11 35 118 24 Perris Vly 61 55 0.6 41 5 31 51 25 Lake Elsinore 67 61 0.3 28 6 19 71 26 Temecula Vly 57 55 0.3 50 3 18 51 27 Anza Vly 55 53 0.2 60 3 16 53 28 Hemet/San Jacinto 58 56 0.4 40 3 30 54 29 Banning 61 57 0.4 33 3 26 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 64 60 0.2 79 5 15 67 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 49 47 0.2 37 4 15 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 74 71 0.5 35 9 22 101 33 SW San Bernardino Vly 80 72 0.6 50 11 34 105 34 C San Bernardino Vly 83 75 0.5 46 7 33 115 35 E San Bernardino Vly 65 63 0.7 44 4 32 77 36 W San Bernardino Mtns 72 67 0.5 33 7 31 90 37 C San Bernardino Mtns 62 58 0.5 42 5 36 61 38 Big Bear Lake 59 57 0.5 38 4 33 58 San Bernardino County: Mojave Desert Air Basin 39 Phelan 63 59 0.4 26 7 35 64 40 Hesperia 59 56 0.4 19 6 38 54 41 Trona 52 47 0.3 26 4 26 44 42 Victorville 59 56 0.4 23 7 37 54 43 Yucca Vly 53 51 0.3 24 4 27 47 44 Barstow 59 54 0.3 17 5 56 53 45 Twentynine Palms 49 48 0.3 27 4 24 44 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., OCT. 04, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Central Mojave Desert AQI: 47 Ozone MODERATE in the following area(s): Antelope Valley AQI: 58 Ozone Banning Pass Area AQI: 58 Ozone Big Bear Lake AQI: 58 Ozone Coachella Valley/Low Desert AQI: 67 Ozone Coastal Area AQI: 100 Ozone Hemet/Elsinore Area AQI: 71 Ozone Metropolitan Area AQI: 100 Ozone Northern Mojave Desert AQI: 53 NO2 San Bernardino Mountains AQI: 90 Ozone San Fernando/Santa Clarita Valleys AQI: 77 Ozone San Gabriel Mountains AQI: 84 Ozone Temecula/Anza Area AQI: 53 PM10 Victor Valley AQI: 64 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Inland Orange County AQI: 108 Ozone Riverside Valley AQI: 118 Ozone San Bernardino Valley AQI: 115 Ozone San Gabriel Valley AQI: 115 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The National Weather Service (NWS) has issued Extreme Heat Warnings that remain in effect through 8 PM Thursday (October 8) for Orange County and portions of San Bernardino, Riverside, and Los Angeles Counties including the coasts, valleys, and the Inland Empire. Gusty Santa Ana winds are expected on Sunday. Elevated to brief critical fire weather is forecast. Inversion Base: 486 FT | Breaking Temperature: 90 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1557 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 8, 9, 10, 19, 22, 23, 32, 33, 34 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 SUNDAY, OCTOBER 04, 2026 IN THE SOUTH COAST AIR BASIN.