SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., JUL. 31, 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 63 0.6 46 16 30 77 2 NW Coastal LA 53 47 0.4 42 14 14 60 3 SW Coastal LA 45 39 0.2 43 11 12 55 4 S Coastal LA 52 48 0.3 39 9 24 50 5 Southeast LA Co 61 57 0.5 42 13 26 58 6 W San Fernando Vly 82 75 0.3 39 11 17 115 7 E San Fernando Vly 81 74 0.5 45 15 24 112 8 W San Gabriel Vly 96 74 0.3 45 15 20 112 9 E San Gabriel Vly 121 93 0.4 43 16 23 169 10 Pomona Walnut Vly 95 84 0.4 43 16 24 147 11 S San Gabriel Vly 72 66 0.4 44 15 23 87 12 S Central LA Co 56 51 0.2 43 12 21 56 13 Santa Clarita Vly 98 82 0.3 41 14 19 140 15 San Gabriel Mts 94 81 0.4 44 13 27 136 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 79 73 0.3 39 12 30 108 Orange County: South Coast Air Basin 16 N Orange Co 65 61 0.2 39 13 15 71 17 Central Orange Co 55 51 0.3 24 12 10 56 18 N Coastal Orange Co 44 43 0.3 30 7 21 40 19 Saddleback Vly 64 55 0.2 39 7 18 51 20 Central Coastal 53 48 0.3 26 7 18 44 21 Capistrano Vly 57 51 0.3 33 7 19 47 Riverside County: South Coast Air Basin 22 Norco/Corona 91 75 0.4 54 13 21 115 23 Metro Riverside Co 106 88 0.5 61 15 24 156 24 Perris Vly 98 83 0.4 44 13 25 143 25 Lake Elsinore 81 76 0.3 25 11 20 118 26 Temecula Vly 61 57 0.3 42 10 18 58 27 Anza Vly 66 63 0.2 48 7 15 77 28 Hemet/San Jacinto 82 72 0.3 39 11 25 105 29 Banning 99 83 0.3 37 10 24 143 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 80 73 0.2 60 12 12 108 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 60 56 0.2 40 7 12 54 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 100 89 0.5 38 15 25 159 33 SW San Bernardino Vly 95 79 0.4 54 16 32 129 34 C San Bernardino Vly 130 100 0.5 45 13 40 187 35 E San Bernardino Vly 128 99 0.5 45 13 26 185 36 W San Bernardino Mtns 101 89 0.4 39 11 31 159 37 C San Bernardino Mtns 116 89 0.3 43 7 30 159 38 Big Bear Lake 87 78 0.3 41 8 27 126 San Bernardino County: Mojave Desert Air Basin 39 Phelan 89 80 0.3 38 8 31 133 40 Hesperia 80 76 0.3 33 8 32 118 41 Trona 61 59 0.2 30 7 19 64 42 Victorville 77 74 0.3 38 10 32 112 43 Yucca Vly 79 70 0.2 39 9 21 100 44 Barstow 72 69 0.3 42 10 41 97 45 Twentynine Palms 69 61 0.2 39 8 19 71 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., JUL. 31, 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: 60 PM2.5 Inland Orange County AQI: 56 PM2.5 Metropolitan Area AQI: 77 Ozone Northern Mojave Desert AQI: 97 Ozone Temecula/Anza Area AQI: 77 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Antelope Valley AQI: 108 Ozone Banning Pass Area AQI: 143 Ozone Big Bear Lake AQI: 126 Ozone Coachella Valley/Low Desert AQI: 108 Ozone Hemet/Elsinore Area AQI: 143 Ozone San Fernando/Santa Clarita Valleys AQI: 140 Ozone San Gabriel Mountains AQI: 136 Ozone Victor Valley AQI: 133 Ozone UNHEALTHY in the following area(s): Riverside Valley AQI: 156 Ozone San Bernardino Mountains AQI: 159 Ozone San Bernardino Valley AQI: 187 Ozone San Gabriel Valley AQI: 169 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ High pressure stregthens over SoCal over the next few days bringing 1-4 degrees of warming over Thursday. Winds will be mostly light and heat risk will be very high. Inversion Base: 486 FT | Breaking Temperature: 85 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2136 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 FRIDAY, JULY 31, 2026 IN THE SOUTH COAST AIR BASIN.