SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., JUL. 23, 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 56 0.6 36 14 30 60 2 NW Coastal LA 61 55 0.5 35 12 15 56 3 SW Coastal LA 48 40 0.2 35 10 16 53 4 S Coastal LA 53 43 0.7 35 9 28 50 5 Southeast LA Co 72 57 0.5 36 13 27 58 6 W San Fernando Vly 91 82 0.4 35 9 19 140 7 E San Fernando Vly 72 65 0.5 37 11 25 84 8 W San Gabriel Vly 96 76 0.4 37 12 21 118 9 E San Gabriel Vly 113 95 0.5 38 13 31 174 10 Pomona Walnut Vly 95 82 0.5 44 15 35 140 11 S San Gabriel Vly 89 71 0.4 37 15 26 101 12 S Central LA Co 64 51 0.4 35 11 22 55 13 Santa Clarita Vly 94 86 0.3 37 9 24 151 15 San Gabriel Mts 91 82 0.4 39 10 31 140 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 100 88 0.3 40 12 25 156 Orange County: South Coast Air Basin 16 N Orange Co 83 71 0.2 48 16 16 101 17 Central Orange Co 70 62 0.3 33 15 13 74 18 N Coastal Orange Co 52 46 0.6 36 7 24 43 19 Saddleback Vly 81 71 0.2 48 10 19 101 20 Central Coastal 64 56 0.3 39 7 19 54 21 Capistrano Vly 68 61 0.3 42 14 19 71 Riverside County: South Coast Air Basin 22 Norco/Corona 100 88 0.4 61 13 23 156 23 Metro Riverside Co 107 96 0.4 68 14 28 177 24 Perris Vly 99 88 0.4 49 13 31 156 25 Lake Elsinore 87 76 0.3 43 13 19 118 26 Temecula Vly 80 71 0.3 42 11 18 101 27 Anza Vly 70 64 0.2 43 7 15 80 28 Hemet/San Jacinto 92 83 0.3 42 10 31 143 29 Banning 108 93 0.3 38 8 27 169 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 86 73 0.2 46 9 12 108 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 58 55 0.2 37 7 14 51 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 104 95 0.5 39 16 35 174 33 SW San Bernardino Vly 100 90 0.5 61 15 34 161 34 C San Bernardino Vly 105 97 0.5 44 12 37 179 35 E San Bernardino Vly 115 105 0.4 46 11 33 200 36 W San Bernardino Mtns 97 92 0.4 39 11 37 166 37 C San Bernardino Mtns 110 105 0.4 42 7 39 200 38 Big Bear Lake 89 83 0.3 41 7 33 143 San Bernardino County: Mojave Desert Air Basin 39 Phelan 84 79 0.4 37 7 39 129 40 Hesperia 83 78 0.4 34 8 41 126 41 Trona 65 62 0.2 28 7 20 74 42 Victorville 85 79 0.3 36 9 42 129 43 Yucca Vly 76 70 0.2 38 7 21 100 44 Barstow 71 64 0.3 34 7 40 80 45 Twentynine Palms 61 55 0.2 38 7 20 51 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., JUL. 23, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Central Mojave Desert AQI: 100 Ozone Coastal Area AQI: 56 PM2.5 Northern Mojave Desert AQI: 80 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Big Bear Lake AQI: 143 Ozone Coachella Valley/Low Desert AQI: 108 Ozone Inland Orange County AQI: 101 Ozone Metropolitan Area AQI: 101 Ozone San Gabriel Mountains AQI: 140 Ozone Temecula/Anza Area AQI: 101 Ozone Victor Valley AQI: 129 Ozone UNHEALTHY in the following area(s): Antelope Valley AQI: 156 Ozone Banning Pass Area AQI: 169 Ozone Hemet/Elsinore Area AQI: 156 Ozone Riverside Valley AQI: 177 Ozone San Bernardino Mountains AQI: 200 Ozone San Bernardino Valley AQI: 200 Ozone San Fernando/Santa Clarita Valleys AQI: 151 Ozone San Gabriel Valley AQI: 174 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The National Weather Service (NWS) has issued Extreme Heat Warnings for the Inland Empire, Coachella Valley, and eastern Riverside County in effect through Monday evening. The NWS has also issued Heat Advisories for most of Orange and Los Angeles Counties, and the mountains of San Bernardino and Riverside Counties through Monday evening. Less coastal cloud coverage is expected than what has been seen recently. Isolated showers are possible for the mountains of San Bernardino and Riverside Counties on Thursday afternoon. Inversion Base: 1499 FT | Breaking Temperature: 92 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2082 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: MARGINAL-BURN Burning is prohibited in source/receptor area 30 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 THURSDAY, JULY 23, 2026 IN THE SOUTH COAST AIR BASIN.