SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., AUG. 24, 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 71 62 0.6 33 13 34 74 2 NW Coastal LA 58 50 0.5 32 9 19 50 3 SW Coastal LA 51 44 0.1 33 12 13 56 4 S Coastal LA 51 44 0.3 35 10 25 53 5 Southeast LA Co 62 54 0.5 36 11 27 55 6 W San Fernando Vly 75 63 0.4 32 8 17 77 7 E San Fernando Vly 75 65 0.5 34 10 26 84 8 W San Gabriel Vly 84 73 0.4 37 10 19 108 9 E San Gabriel Vly 103 88 0.5 42 11 32 156 10 Pomona Walnut Vly 90 77 0.6 43 12 36 122 11 S San Gabriel Vly 73 63 0.4 39 12 20 77 12 S Central LA Co 55 49 0.3 34 10 20 53 13 Santa Clarita Vly 79 71 0.3 33 9 20 101 15 San Gabriel Mts 79 70 0.4 42 8 28 100 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 61 55 0.3 34 10 27 53 Orange County: South Coast Air Basin 16 N Orange Co 67 59 0.2 45 11 14 64 17 Central Orange Co 56 50 0.3 35 10 11 53 18 N Coastal Orange Co 50 43 0.3 35 7 21 40 19 Saddleback Vly 58 51 0.3 45 6 18 47 20 Central Coastal 54 49 0.3 36 7 18 45 21 Capistrano Vly 55 50 0.4 37 8 18 46 Riverside County: South Coast Air Basin 22 Norco/Corona 82 69 0.4 55 11 22 97 23 Metro Riverside Co 90 75 0.5 60 12 21 115 24 Perris Vly 78 67 0.4 48 11 29 90 25 Lake Elsinore 75 64 0.4 37 10 19 80 26 Temecula Vly 54 51 0.3 37 10 18 53 27 Anza Vly 58 53 0.3 38 5 18 49 28 Hemet/San Jacinto 69 61 0.4 42 10 29 71 29 Banning 74 62 0.4 38 7 27 74 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 58 0.2 44 9 18 61 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 49 45 0.2 35 6 15 42 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 92 79 0.5 34 11 31 129 33 SW San Bernardino Vly 85 73 0.5 54 12 33 108 34 C San Bernardino Vly 93 79 0.5 48 9 34 129 35 E San Bernardino Vly 90 75 0.5 51 8 31 115 36 W San Bernardino Mtns 88 77 0.4 37 7 32 122 37 C San Bernardino Mtns 80 73 0.4 44 5 33 108 38 Big Bear Lake 68 62 0.4 42 5 31 74 San Bernardino County: Mojave Desert Air Basin 39 Phelan 71 66 0.4 33 5 31 87 40 Hesperia 67 60 0.4 27 6 33 67 41 Trona 52 46 0.2 29 5 17 43 42 Victorville 66 59 0.4 30 8 32 64 43 Yucca Vly 63 55 0.3 37 7 23 51 44 Barstow 59 54 0.3 32 7 37 50 45 Twentynine Palms 54 50 0.2 36 7 21 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., AUG. 24, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Northern Mojave Desert AQI: 50 Ozone MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Banning Pass Area AQI: 74 Ozone Big Bear Lake AQI: 74 Ozone Central Mojave Desert AQI: 51 Ozone Coachella Valley/Low Desert AQI: 61 Ozone Coastal Area AQI: 56 PM2.5 Hemet/Elsinore Area AQI: 90 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 74 Ozone San Gabriel Mountains AQI: 100 Ozone Temecula/Anza Area AQI: 53 PM2.5 Victor Valley AQI: 87 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Riverside Valley AQI: 115 Ozone San Bernardino Mountains AQI: 122 Ozone San Bernardino Valley AQI: 129 Ozone San Fernando/Santa Clarita Valleys AQI: 101 Ozone UNHEALTHY in the following area(s): San Gabriel Valley AQI: 156 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Above average high and low temperatures will continue through next week.There is a slight chance of showers and thunderstorms for the mountains and lower deserts returning for Monday afternoon. Inversion Base: 1521 FT | Breaking Temperature: 93 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1909 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 MONDAY, AUGUST 24, 2026 IN THE SOUTH COAST AIR BASIN.