SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: WED., AUG. 12, 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 48 41 0.6 23 10 15 53 2 NW Coastal LA 38 34 0.2 23 8 11 44 3 SW Coastal LA 37 33 0.2 22 7 12 39 4 S Coastal LA 41 37 0.2 20 8 16 44 5 Southeast LA Co 45 40 0.4 22 10 13 53 6 W San Fernando Vly 49 45 0.3 23 9 11 50 7 E San Fernando Vly 49 44 0.5 25 10 14 53 8 W San Gabriel Vly 52 47 0.4 27 11 12 55 9 E San Gabriel Vly 63 55 0.5 27 10 19 53 10 Pomona Walnut Vly 61 53 0.4 35 11 20 55 11 S San Gabriel Vly 48 44 0.3 24 11 11 55 12 S Central LA Co 42 37 0.2 22 9 9 50 13 Santa Clarita Vly 63 59 0.2 27 10 14 64 15 San Gabriel Mts 57 52 0.4 34 11 17 55 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 59 53 0.2 35 10 17 53 Orange County: South Coast Air Basin 16 N Orange Co 50 44 0.1 30 10 7 53 17 Central Orange Co 47 40 0.3 15 10 6 53 18 N Coastal Orange Co 43 38 0.3 18 6 13 35 19 Saddleback Vly 49 43 0.3 30 6 10 40 20 Central Coastal 46 40 0.3 21 6 10 37 21 Capistrano Vly 46 41 0.3 25 6 10 38 Riverside County: South Coast Air Basin 22 Norco/Corona 62 53 0.3 44 10 13 53 23 Metro Riverside Co 68 56 0.4 50 12 12 56 24 Perris Vly 71 63 0.3 39 10 18 77 25 Lake Elsinore 62 54 0.3 23 7 10 50 26 Temecula Vly 48 45 0.2 33 9 10 50 27 Anza Vly 54 50 0.2 38 8 10 46 28 Hemet/San Jacinto 63 57 0.2 38 8 19 58 29 Banning 75 66 0.2 36 8 18 87 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 62 0.2 47 11 11 74 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 48 46 0.2 32 8 9 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 66 57 0.5 38 13 15 58 33 SW San Bernardino Vly 62 53 0.4 44 12 21 56 34 C San Bernardino Vly 72 62 0.3 44 10 26 74 35 E San Bernardino Vly 77 66 0.3 42 10 21 87 36 W San Bernardino Mtns 70 60 0.3 37 12 24 67 37 C San Bernardino Mtns 76 71 0.2 42 7 26 101 38 Big Bear Lake 65 61 0.2 39 6 23 71 San Bernardino County: Mojave Desert Air Basin 39 Phelan 65 59 0.3 32 9 28 64 40 Hesperia 66 58 0.2 31 9 30 61 41 Trona 54 52 0.2 32 8 55 52 42 Victorville 71 62 0.2 31 10 31 74 43 Yucca Vly 67 63 0.2 35 9 18 77 44 Barstow 65 62 0.2 26 9 35 74 45 Twentynine Palms 64 60 0.2 33 10 16 67 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON WED., AUG. 12, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 44 PM2.5 Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Banning Pass Area AQI: 87 Ozone Big Bear Lake AQI: 71 Ozone Central Mojave Desert AQI: 77 Ozone Coachella Valley/Low Desert AQI: 74 Ozone Hemet/Elsinore Area AQI: 77 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 53 PM2.5 Northern Mojave Desert AQI: 74 Ozone Riverside Valley AQI: 56 PM2.5 San Bernardino Valley AQI: 87 Ozone San Fernando/Santa Clarita Valleys AQI: 64 Ozone San Gabriel Mountains AQI: 55 PM2.5 San Gabriel Valley AQI: 55 PM2.5 Victor Valley AQI: 74 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 101 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Decreasing temperatures on Wednesday. Potential monsson thunderstorms. Onshore pressure gradients with potential gusty winds in the Coachella Valley and deserts. Inversion Base: 2320 FT | Breaking Temperature: 85 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2544 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 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 Above 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 WEDNESDAY, AUGUST 12, 2026 IN THE SOUTH COAST AIR BASIN.