SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., AUG. 28, 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 83 66 0.7 28 15 32 87 2 NW Coastal LA 61 54 0.3 28 14 16 60 3 SW Coastal LA 47 41 0.2 31 12 11 56 4 S Coastal LA 67 55 0.3 39 10 37 53 5 Southeast LA Co 78 64 0.5 41 13 28 80 6 W San Fernando Vly 72 62 0.4 26 10 20 74 7 E San Fernando Vly 82 68 0.5 29 13 26 93 8 W San Gabriel Vly 96 72 0.4 32 13 21 105 9 E San Gabriel Vly 113 93 0.5 32 12 28 169 10 Pomona Walnut Vly 89 80 0.4 43 15 33 133 11 S San Gabriel Vly 93 74 0.3 40 14 26 112 12 S Central LA Co 69 57 0.2 34 12 19 58 13 Santa Clarita Vly 84 67 0.3 27 10 20 90 15 San Gabriel Mts 81 67 0.4 34 10 30 90 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 63 56 0.3 27 11 31 55 Orange County: South Coast Air Basin 16 N Orange Co 78 68 0.1 44 13 17 93 17 Central Orange Co 61 54 0.4 44 12 13 56 18 N Coastal Orange Co 58 50 0.3 39 7 30 46 19 Saddleback Vly 58 54 0.2 44 7 22 50 20 Central Coastal 54 52 0.3 35 8 22 48 21 Capistrano Vly 53 53 0.3 35 8 21 49 Riverside County: South Coast Air Basin 22 Norco/Corona 73 68 0.3 49 12 25 93 23 Metro Riverside Co 85 79 0.4 53 14 30 129 24 Perris Vly 71 72 0.4 42 13 29 105 25 Lake Elsinore 67 58 0.3 26 9 22 61 26 Temecula Vly 57 56 0.3 47 9 20 54 27 Anza Vly 54 56 0.2 56 7 17 54 28 Hemet/San Jacinto 68 68 0.3 37 11 26 93 29 Banning 72 72 0.3 32 10 18 105 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 68 64 0.2 73 9 15 80 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 45 44 0.2 41 6 14 41 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 94 87 0.5 36 15 34 154 33 SW San Bernardino Vly 85 78 0.4 49 15 35 126 34 C San Bernardino Vly 98 90 0.4 44 12 39 161 35 E San Bernardino Vly 91 87 0.4 43 12 31 154 36 W San Bernardino Mtns 85 80 0.4 36 10 35 133 37 C San Bernardino Mtns 88 80 0.4 42 6 33 133 38 Big Bear Lake 80 73 0.4 37 7 28 108 San Bernardino County: Mojave Desert Air Basin 39 Phelan 66 63 0.4 30 7 30 77 40 Hesperia 67 65 0.4 29 8 32 84 41 Trona 51 49 0.2 21 6 11 45 42 Victorville 66 63 0.3 30 9 29 77 43 Yucca Vly 66 62 0.2 34 8 22 74 44 Barstow 67 61 0.3 32 7 42 71 45 Twentynine Palms 64 58 0.2 36 8 21 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., AUG. 28, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Central Mojave Desert AQI: 74 Ozone Coachella Valley/Low Desert AQI: 80 Ozone Coastal Area AQI: 60 PM2.5 Inland Orange County AQI: 56 PM2.5 Metropolitan Area AQI: 93 Ozone Northern Mojave Desert AQI: 71 Ozone San Fernando/Santa Clarita Valleys AQI: 93 Ozone San Gabriel Mountains AQI: 90 Ozone Temecula/Anza Area AQI: 54 Ozone Victor Valley AQI: 84 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Banning Pass Area AQI: 105 Ozone Big Bear Lake AQI: 108 Ozone Hemet/Elsinore Area AQI: 105 Ozone Riverside Valley AQI: 129 Ozone San Bernardino Mountains AQI: 133 Ozone UNHEALTHY in the following area(s): San Bernardino Valley AQI: 161 Ozone San Gabriel Valley AQI: 169 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy to sunny skies, with high temperatures, are expected across the region. Inversion Base: 486 FT | Breaking Temperature: 90 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1607 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 FRIDAY, AUGUST 28, 2026 IN THE SOUTH COAST AIR BASIN.