SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., AUG. 22, 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 67 58 0.5 31 12 28 61 2 NW Coastal LA 59 47 0.4 30 9 14 50 3 SW Coastal LA 51 39 0.2 32 11 19 55 4 S Coastal LA 54 47 0.2 38 10 23 53 5 Southeast LA Co 64 57 0.5 39 11 28 58 6 W San Fernando Vly 74 61 0.4 29 7 17 71 7 E San Fernando Vly 67 58 0.5 31 10 23 61 8 W San Gabriel Vly 75 66 0.4 33 10 20 87 9 E San Gabriel Vly 95 82 0.5 34 9 30 140 10 Pomona Walnut Vly 90 82 0.6 44 12 35 140 11 S San Gabriel Vly 74 64 0.5 39 11 28 80 12 S Central LA Co 58 50 0.4 34 10 17 53 13 Santa Clarita Vly 85 72 0.3 28 9 20 105 15 San Gabriel Mts 76 66 0.4 36 8 26 87 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 65 58 0.3 27 11 28 61 Orange County: South Coast Air Basin 16 N Orange Co 76 66 0.2 48 11 19 87 17 Central Orange Co 58 52 0.4 41 11 16 55 18 N Coastal Orange Co 50 44 0.3 38 7 21 41 19 Saddleback Vly 57 50 0.3 48 6 19 46 20 Central Coastal 56 50 0.3 37 7 17 46 21 Capistrano Vly 58 52 0.4 35 8 15 48 Riverside County: South Coast Air Basin 22 Norco/Corona 81 71 0.4 57 11 22 101 23 Metro Riverside Co 90 81 0.4 63 13 26 136 24 Perris Vly 77 71 0.4 46 11 28 101 25 Lake Elsinore 71 64 0.4 35 8 15 80 26 Temecula Vly 54 50 0.3 35 8 14 46 27 Anza Vly 52 50 0.3 36 6 13 46 28 Hemet/San Jacinto 66 62 0.4 38 8 26 74 29 Banning 77 69 0.4 35 7 21 97 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 63 0.2 44 11 12 77 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 55 51 0.2 34 8 13 47 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 92 85 0.5 39 11 28 150 33 SW San Bernardino Vly 86 78 0.5 57 12 33 126 34 C San Bernardino Vly 88 83 0.5 43 10 38 143 35 E San Bernardino Vly 94 89 0.4 47 8 30 159 36 W San Bernardino Mtns 83 78 0.4 38 7 32 126 37 C San Bernardino Mtns 89 85 0.4 41 5 32 150 38 Big Bear Lake 75 67 0.4 38 6 28 90 San Bernardino County: Mojave Desert Air Basin 39 Phelan 65 64 0.4 30 5 28 80 40 Hesperia 67 62 0.4 26 6 31 74 41 Trona 59 52 0.2 25 7 22 48 42 Victorville 63 59 0.4 28 8 28 64 43 Yucca Vly 64 58 0.3 35 9 20 61 44 Barstow 61 58 0.3 31 8 39 61 45 Twentynine Palms 58 53 0.2 35 9 19 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., AUG. 22, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Temecula/Anza Area AQI: 46 Ozone MODERATE in the following area(s): Antelope Valley AQI: 61 Ozone Banning Pass Area AQI: 97 Ozone Big Bear Lake AQI: 90 Ozone Central Mojave Desert AQI: 61 Ozone Coachella Valley/Low Desert AQI: 77 Ozone Coastal Area AQI: 55 PM2.5 Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 87 Ozone Northern Mojave Desert AQI: 61 Ozone San Gabriel Mountains AQI: 87 Ozone Victor Valley AQI: 80 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Hemet/Elsinore Area AQI: 101 Ozone Riverside Valley AQI: 136 Ozone San Bernardino Mountains AQI: 150 Ozone San Fernando/Santa Clarita Valleys AQI: 105 Ozone San Gabriel Valley AQI: 140 Ozone UNHEALTHY in the following area(s): San Bernardino Valley AQI: 159 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Moisture will decrease into the weekend with a slight chance of showers and thunderstorms. High temperatures for the weekend will be a few degrees above average near the coast to 4 to 8 degrees above average for inland areas. Inversion Base: 861 FT | Breaking Temperature: 90 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1680 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-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 SATURDAY, AUGUST 22, 2026 IN THE SOUTH COAST AIR BASIN.