SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: WED., SEP. 02, 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 58 51 0.5 28 13 31 58 2 NW Coastal LA 48 44 0.4 26 10 26 53 3 SW Coastal LA 43 39 0.2 27 9 24 50 4 S Coastal LA 43 41 0.3 26 8 24 44 5 Southeast LA Co 51 46 0.5 28 10 33 53 6 W San Fernando Vly 59 53 0.3 25 9 18 50 7 E San Fernando Vly 58 54 0.4 28 11 26 55 8 W San Gabriel Vly 64 54 0.3 31 12 21 56 9 E San Gabriel Vly 69 58 0.5 37 12 29 61 10 Pomona Walnut Vly 63 53 0.4 40 13 35 58 11 S San Gabriel Vly 59 51 0.4 33 12 33 56 12 S Central LA Co 47 44 0.4 27 10 25 53 13 Santa Clarita Vly 77 65 0.3 25 9 20 84 15 San Gabriel Mts 66 58 0.4 37 10 27 61 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 69 61 0.4 21 10 16 71 Orange County: South Coast Air Basin 16 N Orange Co 52 46 0.2 37 11 20 55 17 Central Orange Co 46 40 0.3 20 10 16 53 18 N Coastal Orange Co 45 41 0.3 23 6 22 38 19 Saddleback Vly 50 45 0.2 37 6 20 42 20 Central Coastal 48 43 0.2 25 6 20 40 21 Capistrano Vly 48 44 0.3 29 6 20 41 Riverside County: South Coast Air Basin 22 Norco/Corona 62 55 0.4 53 13 22 58 23 Metro Riverside Co 70 58 0.5 60 15 23 62 24 Perris Vly 66 59 0.5 41 10 27 64 25 Lake Elsinore 58 55 0.3 26 8 20 51 26 Temecula Vly 49 46 0.3 36 7 19 43 27 Anza Vly 52 49 0.2 40 9 18 50 28 Hemet/San Jacinto 59 54 0.4 35 7 25 50 29 Banning 69 62 0.4 32 5 17 74 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 60 57 0.2 48 10 16 58 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 49 46 0.2 32 13 16 58 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 71 58 0.5 38 12 31 61 33 SW San Bernardino Vly 64 54 0.4 53 14 32 60 34 C San Bernardino Vly 74 62 0.5 39 12 35 74 35 E San Bernardino Vly 75 65 0.5 45 8 29 84 36 W San Bernardino Mtns 71 59 0.5 36 9 30 64 37 C San Bernardino Mtns 69 61 0.5 37 5 30 71 38 Big Bear Lake 64 59 0.4 35 7 26 64 San Bernardino County: Mojave Desert Air Basin 39 Phelan 66 60 0.4 29 5 20 67 40 Hesperia 60 55 0.4 26 7 26 51 41 Trona 56 51 0.2 25 8 20 47 42 Victorville 69 63 0.4 27 8 16 77 43 Yucca Vly 70 61 0.3 29 13 18 71 44 Barstow 67 60 0.3 24 9 23 67 45 Twentynine Palms 58 56 0.2 30 13 18 58 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON WED., SEP. 02, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 71 Ozone Banning Pass Area AQI: 74 Ozone Big Bear Lake AQI: 64 Ozone Central Mojave Desert AQI: 71 Ozone Coachella Valley/Low Desert AQI: 58 PM2.5 Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 64 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 67 Ozone Riverside Valley AQI: 62 PM2.5 San Bernardino Mountains AQI: 71 Ozone San Bernardino Valley AQI: 84 Ozone San Fernando/Santa Clarita Valleys AQI: 84 Ozone San Gabriel Mountains AQI: 61 Ozone San Gabriel Valley AQI: 61 Ozone Victor Valley AQI: 77 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cooler temperatures will persist on Wednesday with onshore flow and sunny skies. Night and morning clouds are expected in the western valleys and along the coast. Inversion Base: 1621 FT | Breaking Temperature: 78 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2448 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 Above 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 WEDNESDAY, SEPTEMBER 02, 2026 IN THE SOUTH COAST AIR BASIN.