SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., AUG. 31, 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 56 49 0.7 25 13 20 58 2 NW Coastal LA 46 42 0.3 26 12 15 56 3 SW Coastal LA 42 39 0.2 27 12 11 56 4 S Coastal LA 44 40 0.2 30 10 17 53 5 Southeast LA Co 51 44 0.5 33 11 20 55 6 W San Fernando Vly 54 47 0.4 26 10 13 53 7 E San Fernando Vly 54 47 0.5 27 11 17 55 8 W San Gabriel Vly 62 54 0.3 33 12 15 56 9 E San Gabriel Vly 62 57 0.5 41 11 21 58 10 Pomona Walnut Vly 67 61 0.4 41 13 25 71 11 S San Gabriel Vly 58 50 0.4 36 13 20 58 12 S Central LA Co 48 42 0.3 28 11 16 55 13 Santa Clarita Vly 68 56 0.3 26 10 16 54 15 San Gabriel Mts 60 53 0.5 41 10 18 53 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 53 51 0.3 28 12 12 56 Orange County: South Coast Air Basin 16 N Orange Co 54 48 0.2 37 11 14 55 17 Central Orange Co 45 40 0.3 32 10 11 53 18 N Coastal Orange Co 46 42 0.2 30 7 15 39 19 Saddleback Vly 49 47 0.1 37 5 14 44 20 Central Coastal 47 45 0.2 30 7 14 42 21 Capistrano Vly 46 44 0.2 32 8 14 44 Riverside County: South Coast Air Basin 22 Norco/Corona 58 54 0.4 43 10 17 53 23 Metro Riverside Co 66 60 0.6 46 13 15 67 24 Perris Vly 55 54 0.4 38 10 22 53 25 Lake Elsinore 48 47 0.3 28 9 14 50 26 Temecula Vly 42 39 0.2 38 9 13 50 27 Anza Vly 46 42 0.2 42 5 13 39 28 Hemet/San Jacinto 50 47 0.3 35 7 21 44 29 Banning 57 50 0.3 33 5 17 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 56 52 0.2 50 7 13 48 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 43 41 0.2 37 5 13 38 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 63 58 0.5 37 14 19 61 33 SW San Bernardino Vly 62 57 0.4 43 13 26 58 34 C San Bernardino Vly 65 60 0.4 39 11 33 67 35 E San Bernardino Vly 68 63 0.5 39 8 25 77 36 W San Bernardino Mtns 64 58 0.4 38 10 25 61 37 C San Bernardino Mtns 67 59 0.4 38 6 26 64 38 Big Bear Lake 61 53 0.3 36 5 24 49 San Bernardino County: Mojave Desert Air Basin 39 Phelan 65 60 0.4 34 5 19 67 40 Hesperia 54 50 0.3 33 8 23 46 41 Trona 54 49 0.2 41 5 52 49 42 Victorville 56 52 0.3 33 9 18 50 43 Yucca Vly 60 52 0.2 35 5 20 48 44 Barstow 53 50 0.3 31 8 38 46 45 Twentynine Palms 45 42 0.2 36 5 19 39 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., AUG. 31, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 46 Ozone Big Bear Lake AQI: 49 Ozone Central Mojave Desert AQI: 48 Ozone Coachella Valley/Low Desert AQI: 48 Ozone Northern Mojave Desert AQI: 49 NO2 Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 56 PM2.5 Coastal Area AQI: 56 PM2.5 Hemet/Elsinore Area AQI: 53 PM2.5 Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 58 PM2.5 Riverside Valley AQI: 67 Ozone San Bernardino Mountains AQI: 64 Ozone San Bernardino Valley AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 55 PM2.5 San Gabriel Mountains AQI: 53 PM2.5 San Gabriel Valley AQI: 71 Ozone Victor Valley AQI: 67 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy skies with cooler temperatures are expected. Inversion Base: 2263 FT | Breaking Temperature: 88 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2688 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 MONDAY, AUGUST 31, 2026 IN THE SOUTH COAST AIR BASIN.