SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., AUG. 27, 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 76 66 0.8 26 15 41 87 2 NW Coastal LA 65 55 0.4 28 12 14 56 3 SW Coastal LA 46 38 0.3 31 10 19 53 4 S Coastal LA 55 46 0.3 37 10 39 53 5 Southeast LA Co 71 58 0.5 39 12 34 61 6 W San Fernando Vly 80 73 0.4 30 12 23 108 7 E San Fernando Vly 76 70 0.6 31 14 30 100 8 W San Gabriel Vly 95 78 0.3 35 14 22 126 9 E San Gabriel Vly 111 91 0.5 40 13 33 164 10 Pomona Walnut Vly 97 78 0.5 42 13 42 126 11 S San Gabriel Vly 88 71 0.3 40 13 29 101 12 S Central LA Co 63 52 0.3 32 12 28 56 13 Santa Clarita Vly 92 81 0.3 34 12 23 136 15 San Gabriel Mts 87 77 0.4 40 12 30 122 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 75 65 0.3 45 12 30 84 Orange County: South Coast Air Basin 16 N Orange Co 76 59 0.2 42 11 18 64 17 Central Orange Co 61 50 0.4 41 11 15 55 18 N Coastal Orange Co 50 46 0.3 37 6 32 43 19 Saddleback Vly 56 56 0.2 42 6 24 54 20 Central Coastal 54 52 0.2 36 6 24 48 21 Capistrano Vly 55 52 0.3 34 7 23 48 Riverside County: South Coast Air Basin 22 Norco/Corona 82 73 0.4 46 13 28 108 23 Metro Riverside Co 92 80 0.7 50 15 35 133 24 Perris Vly 81 76 0.4 41 15 31 118 25 Lake Elsinore 71 65 0.3 33 11 24 84 26 Temecula Vly 59 55 0.3 33 9 21 51 27 Anza Vly 64 59 0.2 34 11 18 64 28 Hemet/San Jacinto 72 68 0.3 33 10 28 93 29 Banning 77 72 0.3 31 8 25 105 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 73 66 0.2 44 20 16 87 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 51 48 0.2 34 12 14 56 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 102 88 0.5 36 15 33 156 33 SW San Bernardino Vly 90 76 0.5 46 14 40 118 34 C San Bernardino Vly 93 85 0.4 31 13 48 150 35 E San Bernardino Vly 95 88 0.5 42 12 33 156 36 W San Bernardino Mtns 92 82 0.4 39 11 38 140 37 C San Bernardino Mtns 87 79 0.3 39 6 34 129 38 Big Bear Lake 86 77 0.3 35 10 29 122 San Bernardino County: Mojave Desert Air Basin 39 Phelan 70 66 0.3 42 7 34 87 40 Hesperia 72 66 0.3 42 9 34 87 41 Trona 56 51 0.2 31 6 11 47 42 Victorville 70 63 0.3 41 11 35 77 43 Yucca Vly 78 68 0.2 37 15 23 93 44 Barstow 66 63 0.3 36 11 42 77 45 Twentynine Palms 67 61 0.2 37 14 21 71 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., AUG. 27, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 84 Ozone Central Mojave Desert AQI: 93 Ozone Coachella Valley/Low Desert AQI: 87 Ozone Coastal Area AQI: 56 PM2.5 Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 87 Ozone Northern Mojave Desert AQI: 77 Ozone Temecula/Anza Area AQI: 64 Ozone Victor Valley AQI: 87 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Banning Pass Area AQI: 105 Ozone Big Bear Lake AQI: 122 Ozone Hemet/Elsinore Area AQI: 118 Ozone Riverside Valley AQI: 133 Ozone San Bernardino Mountains AQI: 140 Ozone San Fernando/Santa Clarita Valleys AQI: 136 Ozone San Gabriel Mountains AQI: 122 Ozone UNHEALTHY in the following area(s): San Bernardino Valley AQI: 156 Ozone San Gabriel Valley AQI: 164 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy skies with high temperatures are expected. Inversion Base: 1497 FT | Breaking Temperature: 96 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1941 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 THURSDAY, AUGUST 27, 2026 IN THE SOUTH COAST AIR BASIN.