SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: WED., AUG. 19, 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 72 66 0.6 31 15 32 87 2 NW Coastal LA 61 53 0.4 31 10 14 53 3 SW Coastal LA 51 40 0.1 30 11 19 55 4 S Coastal LA 54 50 0.3 29 10 27 53 5 Southeast LA Co 73 63 0.5 31 14 28 77 6 W San Fernando Vly 90 80 0.4 31 10 20 133 7 E San Fernando Vly 82 75 0.5 33 14 27 115 8 W San Gabriel Vly 88 79 0.4 36 15 24 129 9 E San Gabriel Vly 108 90 0.4 40 12 29 161 10 Pomona Walnut Vly 103 85 0.6 42 15 36 150 11 S San Gabriel Vly 83 72 0.5 35 16 25 105 12 S Central LA Co 64 56 0.4 30 12 21 56 13 Santa Clarita Vly 97 87 0.3 34 10 26 154 15 San Gabriel Mts 87 78 0.4 40 11 30 126 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 75 71 0.3 40 12 30 101 Orange County: South Coast Air Basin 16 N Orange Co 83 69 0.2 41 13 15 97 17 Central Orange Co 62 53 0.3 23 12 11 56 18 N Coastal Orange Co 49 43 0.3 27 6 23 40 19 Saddleback Vly 64 55 0.2 41 6 20 51 20 Central Coastal 56 48 0.3 31 6 20 44 21 Capistrano Vly 58 51 0.3 35 9 21 50 Riverside County: South Coast Air Basin 22 Norco/Corona 90 77 0.4 57 12 23 122 23 Metro Riverside Co 101 85 0.4 64 14 27 150 24 Perris Vly 83 77 0.4 44 12 30 122 25 Lake Elsinore 72 66 0.4 34 9 22 87 26 Temecula Vly 58 52 0.3 43 9 20 50 27 Anza Vly 57 52 0.3 48 6 17 48 28 Hemet/San Jacinto 70 65 0.4 39 9 29 84 29 Banning 86 74 0.4 31 7 24 112 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 63 58 0.2 58 9 14 61 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 41 39 0.2 38 6 14 36 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 94 79 0.5 39 13 34 129 33 SW San Bernardino Vly 95 78 0.5 56 14 36 126 34 C San Bernardino Vly 103 87 0.5 30 11 42 154 35 E San Bernardino Vly 106 90 0.4 43 10 31 161 36 W San Bernardino Mtns 90 78 0.4 38 8 35 126 37 C San Bernardino Mtns 102 88 0.4 32 6 34 156 38 Big Bear Lake 78 69 0.4 33 6 30 97 San Bernardino County: Mojave Desert Air Basin 39 Phelan 72 66 0.4 36 6 29 87 40 Hesperia 80 67 0.4 30 7 32 90 41 Trona 58 53 0.2 27 6 23 49 42 Victorville 78 65 0.4 33 9 28 84 43 Yucca Vly 64 59 0.3 36 6 20 64 44 Barstow 63 62 0.3 32 9 36 74 45 Twentynine Palms 53 50 0.2 37 6 19 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON WED., AUG. 19, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Big Bear Lake AQI: 97 Ozone Central Mojave Desert AQI: 64 Ozone Coachella Valley/Low Desert AQI: 61 Ozone Coastal Area AQI: 55 PM2.5 Inland Orange County AQI: 56 PM2.5 Metropolitan Area AQI: 97 Ozone Northern Mojave Desert AQI: 74 Ozone Victor Valley AQI: 90 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Antelope Valley AQI: 101 Ozone Banning Pass Area AQI: 112 Ozone Hemet/Elsinore Area AQI: 122 Ozone Riverside Valley AQI: 150 Ozone San Gabriel Mountains AQI: 126 Ozone UNHEALTHY in the following area(s): San Bernardino Mountains AQI: 156 Ozone San Bernardino Valley AQI: 161 Ozone San Fernando/Santa Clarita Valleys AQI: 154 Ozone San Gabriel Valley AQI: 161 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ High temperatures will be around 5 degrees above average for inland areas for Wednesday. Night and morning coastal low clouds will continue into next week. Inversion Base: 1532 FT | Breaking Temperature: 91 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1849 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-BURN Area 53 - Mojave Desert Air Basin: Area 55 - Salton Sea Air Basin: 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 WEDNESDAY, AUGUST 19, 2026 IN THE SOUTH COAST AIR BASIN.