SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., AUG. 16, 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 57 49 0.7 24 8 19 45 2 NW Coastal LA 42 45 0.4 25 7 5 42 3 SW Coastal LA 39 42 0.1 31 6 9 39 4 S Coastal LA 47 42 0.2 41 6 15 39 5 Southeast LA Co 55 48 0.5 42 8 15 44 6 W San Fernando Vly 55 54 0.3 25 7 12 50 7 E San Fernando Vly 58 58 0.5 25 8 14 61 8 W San Gabriel Vly 68 61 0.3 30 8 7 71 9 E San Gabriel Vly 75 70 0.4 34 7 13 100 10 Pomona Walnut Vly 75 61 0.4 45 9 22 71 11 S San Gabriel Vly 63 53 0.4 43 9 15 50 12 S Central LA Co 52 44 0.3 33 7 7 41 13 Santa Clarita Vly 67 63 0.2 26 8 13 77 15 San Gabriel Mts 63 62 0.4 37 7 17 74 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 65 61 0.3 29 9 11 71 Orange County: South Coast Air Basin 16 N Orange Co 61 55 0.2 47 9 10 51 17 Central Orange Co 49 49 0.4 47 9 11 50 18 N Coastal Orange Co 46 42 0.3 41 5 14 39 19 Saddleback Vly 55 52 0.2 46 4 12 48 20 Central Coastal 50 48 0.3 39 4 10 44 21 Capistrano Vly 51 52 0.3 34 6 9 48 Riverside County: South Coast Air Basin 22 Norco/Corona 66 65 0.4 50 9 13 84 23 Metro Riverside Co 73 69 0.6 53 11 14 97 24 Perris Vly 72 68 0.4 39 10 18 93 25 Lake Elsinore 62 66 0.3 31 9 8 87 26 Temecula Vly 47 54 0.3 37 8 8 50 27 Anza Vly 48 53 0.2 41 6 9 49 28 Hemet/San Jacinto 59 62 0.3 34 9 20 74 29 Banning 67 65 0.3 31 7 19 84 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 62 0.2 48 7 9 74 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 40 38 0.2 36 4 8 35 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 72 69 0.4 39 11 17 97 33 SW San Bernardino Vly 70 65 0.4 50 11 23 84 34 C San Bernardino Vly 77 73 0.4 37 10 29 108 35 E San Bernardino Vly 78 77 0.5 40 9 22 122 36 W San Bernardino Mtns 67 65 0.4 37 8 25 84 37 C San Bernardino Mtns 72 70 0.3 36 6 27 100 38 Big Bear Lake 55 55 0.3 34 4 25 51 San Bernardino County: Mojave Desert Air Basin 39 Phelan 55 52 0.3 32 6 29 48 40 Hesperia 57 60 0.3 29 7 31 67 41 Trona 49 49 0.2 25 5 18 45 42 Victorville 59 55 0.3 31 8 32 51 43 Yucca Vly 55 54 0.2 36 6 19 50 44 Barstow 55 57 0.2 34 8 44 58 45 Twentynine Palms 47 46 0.2 36 5 17 43 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., AUG. 16, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Central Mojave Desert AQI: 50 Ozone Coastal Area AQI: 44 Ozone Inland Orange County AQI: 50 PM2.5 Temecula/Anza Area AQI: 50 Ozone MODERATE in the following area(s): Antelope Valley AQI: 71 Ozone Banning Pass Area AQI: 84 Ozone Big Bear Lake AQI: 51 Ozone Coachella Valley/Low Desert AQI: 74 Ozone Hemet/Elsinore Area AQI: 93 Ozone Metropolitan Area AQI: 51 Ozone Northern Mojave Desert AQI: 58 Ozone Riverside Valley AQI: 97 Ozone San Bernardino Mountains AQI: 100 Ozone San Fernando/Santa Clarita Valleys AQI: 77 Ozone San Gabriel Mountains AQI: 74 Ozone San Gabriel Valley AQI: 100 Ozone Victor Valley AQI: 67 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Valley AQI: 122 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Night and morning low clouds are expected on Sunday for the coasts and valleys, but less than was seen in recent days. Weakening onshore flow and a gradual warming trend are forecast to continue. Inversion Base: 1650 FT | Breaking Temperature: 88 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1955 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 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 SUNDAY, AUGUST 16, 2026 IN THE SOUTH COAST AIR BASIN.