SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., AUG. 13, 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 46 40 0.5 20 9 19 50 2 NW Coastal LA 39 34 0.3 20 7 14 39 3 SW Coastal LA 38 34 0.1 20 7 13 39 4 S Coastal LA 41 35 0.2 21 7 20 39 5 Southeast LA Co 46 38 0.4 22 8 19 44 6 W San Fernando Vly 49 42 0.3 20 8 13 44 7 E San Fernando Vly 51 45 0.4 21 9 16 50 8 W San Gabriel Vly 50 44 0.3 24 8 13 44 9 E San Gabriel Vly 60 48 0.3 26 9 18 50 10 Pomona Walnut Vly 63 51 0.3 34 9 17 50 11 S San Gabriel Vly 50 41 0.3 24 9 19 50 12 S Central LA Co 42 36 0.2 20 8 17 44 13 Santa Clarita Vly 60 49 0.2 22 10 14 53 15 San Gabriel Mts 54 47 0.3 34 8 16 44 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 58 52 0.2 26 10 11 53 Orange County: South Coast Air Basin 16 N Orange Co 51 41 0.1 27 8 13 44 17 Central Orange Co 46 38 0.3 21 8 12 44 18 N Coastal Orange Co 40 35 0.2 20 5 17 32 19 Saddleback Vly 44 40 0.2 27 5 13 37 20 Central Coastal 40 36 0.2 18 5 13 33 21 Capistrano Vly 40 36 0.2 23 5 11 33 Riverside County: South Coast Air Basin 22 Norco/Corona 56 47 0.4 35 9 13 50 23 Metro Riverside Co 65 54 0.8 37 10 12 53 24 Perris Vly 59 52 0.4 37 8 16 48 25 Lake Elsinore 48 43 0.2 15 6 11 40 26 Temecula Vly 43 39 0.2 32 8 11 44 27 Anza Vly 52 48 0.2 38 6 12 44 28 Hemet/San Jacinto 51 47 0.3 35 6 15 44 29 Banning 57 51 0.3 33 6 10 47 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 65 59 0.2 50 8 13 64 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 41 39 0.2 32 7 12 39 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 62 50 0.3 38 10 16 53 33 SW San Bernardino Vly 59 48 0.3 37 10 17 53 34 C San Bernardino Vly 62 54 0.3 43 10 21 50 35 E San Bernardino Vly 68 59 0.6 40 9 18 64 36 W San Bernardino Mtns 62 53 0.3 36 9 20 50 37 C San Bernardino Mtns 69 63 0.3 40 7 21 77 38 Big Bear Lake 60 54 0.3 37 5 22 50 San Bernardino County: Mojave Desert Air Basin 39 Phelan 58 53 0.2 29 6 21 49 40 Hesperia 64 56 0.2 28 8 23 54 41 Trona 55 52 0.1 24 7 46 48 42 Victorville 61 53 0.2 29 9 23 50 43 Yucca Vly 59 57 0.2 33 6 19 58 44 Barstow 59 55 0.2 23 8 36 51 45 Twentynine Palms 51 50 0.2 33 7 18 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., AUG. 13, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 47 Ozone Big Bear Lake AQI: 50 Ozone Coastal Area AQI: 39 PM2.5 Hemet/Elsinore Area AQI: 48 Ozone Inland Orange County AQI: 44 PM2.5 Metropolitan Area AQI: 50 PM2.5 San Gabriel Mountains AQI: 44 PM2.5 San Gabriel Valley AQI: 50 PM2.5 Temecula/Anza Area AQI: 44 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Central Mojave Desert AQI: 58 Ozone Coachella Valley/Low Desert AQI: 64 Ozone Northern Mojave Desert AQI: 51 Ozone Riverside Valley AQI: 53 PM2.5 San Bernardino Mountains AQI: 77 Ozone San Bernardino Valley AQI: 64 Ozone San Fernando/Santa Clarita Valleys AQI: 53 PM2.5 Victor Valley AQI: 54 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cooling temperatures on Thursday. Onshore pressure gradients. Inversion Base: 3010 FT | Breaking Temperature: 84 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 3183 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 THURSDAY, AUGUST 13, 2026 IN THE SOUTH COAST AIR BASIN.