SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., AUG. 23, 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 57 0.5 36 12 29 58 2 NW Coastal LA 54 48 0.4 35 13 11 58 3 SW Coastal LA 43 39 0.1 38 12 10 56 4 S Coastal LA 47 41 0.3 44 11 18 55 5 Southeast LA Co 62 54 0.4 45 11 24 55 6 W San Fernando Vly 72 60 0.5 34 8 17 67 7 E San Fernando Vly 67 56 0.5 36 10 23 54 8 W San Gabriel Vly 82 68 0.5 37 10 18 93 9 E San Gabriel Vly 101 88 0.4 31 10 21 156 10 Pomona Walnut Vly 91 84 0.6 47 12 26 147 11 S San Gabriel Vly 75 63 0.4 43 12 22 77 12 S Central LA Co 56 48 0.3 40 10 12 53 13 Santa Clarita Vly 80 68 0.3 34 9 15 93 15 San Gabriel Mts 74 65 0.5 35 8 20 84 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 57 52 0.4 33 11 13 55 Orange County: South Coast Air Basin 16 N Orange Co 68 60 0.2 51 11 11 67 17 Central Orange Co 52 47 0.3 47 10 16 53 18 N Coastal Orange Co 48 42 0.3 43 7 17 40 19 Saddleback Vly 66 57 0.3 51 6 18 58 20 Central Coastal 59 51 0.3 41 7 14 47 21 Capistrano Vly 59 52 0.4 37 8 13 48 Riverside County: South Coast Air Basin 22 Norco/Corona 76 68 0.4 59 11 21 93 23 Metro Riverside Co 81 75 0.4 65 14 23 115 24 Perris Vly 65 62 0.4 45 11 25 74 25 Lake Elsinore 69 61 0.4 35 8 11 71 26 Temecula Vly 55 48 0.4 35 9 12 50 27 Anza Vly 47 45 0.3 37 5 13 42 28 Hemet/San Jacinto 58 55 0.4 41 9 25 51 29 Banning 71 63 0.4 38 7 23 77 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 58 54 0.2 44 9 14 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 49 47 0.2 35 7 13 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 83 78 0.6 34 11 21 126 33 SW San Bernardino Vly 82 75 0.5 59 13 26 115 34 C San Bernardino Vly 91 87 0.5 47 10 31 154 35 E San Bernardino Vly 82 80 0.5 46 8 27 133 36 W San Bernardino Mtns 79 72 0.5 36 7 26 105 37 C San Bernardino Mtns 76 70 0.5 44 5 28 100 38 Big Bear Lake 68 62 0.5 41 5 27 74 San Bernardino County: Mojave Desert Air Basin 39 Phelan 68 61 0.4 30 5 24 71 40 Hesperia 65 56 0.5 27 7 28 54 41 Trona 55 48 0.2 31 6 30 44 42 Victorville 62 55 0.4 30 8 26 51 43 Yucca Vly 56 52 0.3 37 7 21 48 44 Barstow 59 54 0.3 32 9 38 50 45 Twentynine Palms 50 47 0.3 36 8 19 44 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., AUG. 23, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Central Mojave Desert AQI: 48 Ozone Coachella Valley/Low Desert AQI: 50 PM2.5 Northern Mojave Desert AQI: 50 PM2.5 Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Banning Pass Area AQI: 77 Ozone Big Bear Lake AQI: 74 Ozone Coastal Area AQI: 58 PM2.5 Hemet/Elsinore Area AQI: 74 Ozone Inland Orange County AQI: 58 Ozone Metropolitan Area AQI: 67 Ozone San Fernando/Santa Clarita Valleys AQI: 93 Ozone San Gabriel Mountains AQI: 84 Ozone Victor Valley AQI: 71 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Riverside Valley AQI: 115 Ozone San Bernardino Mountains AQI: 105 Ozone UNHEALTHY in the following area(s): San Bernardino Valley AQI: 154 Ozone San Gabriel Valley AQI: 156 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Moisture will decrease this weekend. Above average high and low temperatures will continue. A couple of record high minimum temperatures were set yesterday. Inversion Base: 808 FT | Breaking Temperature: 89 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1765 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 SUNDAY, AUGUST 23, 2026 IN THE SOUTH COAST AIR BASIN.