SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., AUG. 15, 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 54 46 0.9 23 8 15 44 2 NW Coastal LA 38 38 0.3 23 7 11 39 3 SW Coastal LA 37 37 0.2 22 6 7 34 4 S Coastal LA 46 37 0.3 22 6 13 34 5 Southeast LA Co 53 44 0.6 23 8 16 44 6 W San Fernando Vly 51 51 0.3 23 8 12 47 7 E San Fernando Vly 50 43 0.6 24 8 14 44 8 W San Gabriel Vly 60 50 0.4 27 8 12 46 9 E San Gabriel Vly 78 66 0.4 31 9 14 87 10 Pomona Walnut Vly 72 58 0.4 37 10 18 61 11 S San Gabriel Vly 59 48 0.4 27 8 16 44 12 S Central LA Co 48 42 0.2 22 7 9 39 13 Santa Clarita Vly 65 59 0.3 24 10 14 64 15 San Gabriel Mts 61 56 0.3 35 8 17 54 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 60 57 0.2 26 10 17 58 Orange County: South Coast Air Basin 16 N Orange Co 60 51 0.2 33 8 10 47 17 Central Orange Co 49 45 0.3 18 8 10 44 18 N Coastal Orange Co 44 40 0.3 21 5 12 37 19 Saddleback Vly 49 46 0.2 33 4 11 43 20 Central Coastal 44 42 0.2 23 4 10 39 21 Capistrano Vly 44 43 0.3 27 4 9 40 Riverside County: South Coast Air Basin 22 Norco/Corona 60 58 0.3 46 10 13 61 23 Metro Riverside Co 65 63 0.4 52 12 12 77 24 Perris Vly 69 65 0.3 36 10 19 84 25 Lake Elsinore 53 51 0.3 25 8 9 47 26 Temecula Vly 38 42 0.2 33 7 9 39 27 Anza Vly 45 44 0.2 38 5 10 41 28 Hemet/San Jacinto 54 54 0.3 35 7 21 50 29 Banning 67 59 0.2 33 7 18 64 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 55 0.2 45 12 11 56 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 44 38 0.2 33 8 10 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 77 67 0.4 39 11 16 90 33 SW San Bernardino Vly 66 60 0.4 46 11 19 67 34 C San Bernardino Vly 75 71 0.3 39 10 23 101 35 E San Bernardino Vly 74 71 0.3 37 10 23 101 36 W San Bernardino Mtns 72 66 0.3 36 9 29 87 37 C San Bernardino Mtns 79 76 0.3 37 7 34 118 38 Big Bear Lake 60 60 0.3 35 5 26 67 San Bernardino County: Mojave Desert Air Basin 39 Phelan 59 55 0.3 29 6 38 51 40 Hesperia 62 61 0.3 27 7 41 71 41 Trona 49 50 0.2 29 5 16 46 42 Victorville 63 54 0.3 28 8 44 50 43 Yucca Vly 61 56 0.2 36 9 19 54 44 Barstow 61 59 0.2 31 9 40 64 45 Twentynine Palms 53 49 0.2 35 9 17 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., AUG. 15, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 39 PM2.5 Inland Orange County AQI: 44 PM2.5 Metropolitan Area AQI: 47 Ozone Temecula/Anza Area AQI: 41 Ozone MODERATE in the following area(s): Antelope Valley AQI: 58 Ozone Banning Pass Area AQI: 64 Ozone Big Bear Lake AQI: 67 Ozone Central Mojave Desert AQI: 54 Ozone Coachella Valley/Low Desert AQI: 56 PM2.5 Hemet/Elsinore Area AQI: 84 Ozone Northern Mojave Desert AQI: 64 Ozone Riverside Valley AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 64 Ozone San Gabriel Mountains AQI: 54 Ozone San Gabriel Valley AQI: 87 Ozone Victor Valley AQI: 71 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 118 Ozone San Bernardino Valley AQI: 101 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Night and morning low clouds are expected for portions of the valleys Saturday with weakening onshore flow and a gradual warming trend. Clouds may develop near the mountains on Saturday afternoon. Inversion Base: 2382 FT | Breaking Temperature: 86 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2840 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 34, 35, 37 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 15, 2026 IN THE SOUTH COAST AIR BASIN.