SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., JUL. 27, 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 65 56 0.6 25 13 24 58 2 NW Coastal LA 55 46 0.3 26 12 13 56 3 SW Coastal LA 43 34 0.1 34 9 10 50 4 S Coastal LA 50 46 0.2 47 8 24 44 5 Southeast LA Co 57 53 0.4 48 11 21 55 6 W San Fernando Vly 70 62 0.3 26 11 16 74 7 E San Fernando Vly 77 69 0.5 26 15 21 97 8 W San Gabriel Vly 72 65 0.3 32 15 18 84 9 E San Gabriel Vly 91 81 0.4 33 13 21 136 10 Pomona Walnut Vly 81 74 0.4 48 13 24 112 11 S San Gabriel Vly 64 60 0.3 47 12 21 67 12 S Central LA Co 52 48 0.2 37 10 15 53 13 Santa Clarita Vly 83 70 0.3 28 11 23 100 15 San Gabriel Mts 78 71 0.4 35 13 24 101 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 69 64 0.3 32 12 20 80 Orange County: South Coast Air Basin 16 N Orange Co 61 58 0.2 54 11 15 61 17 Central Orange Co 49 47 0.3 54 10 9 53 18 N Coastal Orange Co 42 39 0.2 46 6 21 43 19 Saddleback Vly 51 44 0.2 49 5 18 45 20 Central Coastal 47 41 0.3 42 6 18 39 21 Capistrano Vly 52 45 0.3 33 7 19 42 Riverside County: South Coast Air Basin 22 Norco/Corona 73 63 0.4 51 11 19 77 23 Metro Riverside Co 80 71 0.5 53 13 17 101 24 Perris Vly 80 75 0.4 41 12 25 115 25 Lake Elsinore 69 62 0.3 26 10 20 74 26 Temecula Vly 55 50 0.3 37 9 18 50 27 Anza Vly 58 55 0.4 41 7 15 51 28 Hemet/San Jacinto 68 63 0.4 36 10 25 77 29 Banning 78 71 0.4 33 10 21 101 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 78 70 0.4 50 11 13 100 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 45 41 0.3 36 7 12 39 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 89 81 0.4 37 15 25 136 33 SW San Bernardino Vly 77 71 0.4 51 14 29 101 34 C San Bernardino Vly 87 78 0.4 41 13 33 126 35 E San Bernardino Vly 87 78 0.4 43 11 28 126 36 W San Bernardino Mtns 89 81 0.4 37 12 28 136 37 C San Bernardino Mtns 92 82 0.4 39 7 30 140 38 Big Bear Lake 71 66 0.4 36 6 27 87 San Bernardino County: Mojave Desert Air Basin 39 Phelan 82 69 0.3 32 8 24 97 40 Hesperia 74 69 0.4 30 8 27 97 41 Trona 52 50 0.2 26 6 24 46 42 Victorville 75 70 0.3 31 10 23 100 43 Yucca Vly 81 66 0.4 34 9 20 87 44 Barstow 67 63 0.3 26 8 36 77 45 Twentynine Palms 71 64 0.4 35 10 18 80 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., JUL. 27, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 80 Ozone Big Bear Lake AQI: 87 Ozone Central Mojave Desert AQI: 87 Ozone Coachella Valley/Low Desert AQI: 100 Ozone Coastal Area AQI: 56 PM2.5 Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 61 Ozone Northern Mojave Desert AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 100 Ozone Temecula/Anza Area AQI: 51 Ozone Victor Valley AQI: 100 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Banning Pass Area AQI: 101 Ozone Hemet/Elsinore Area AQI: 115 Ozone Riverside Valley AQI: 101 Ozone San Bernardino Mountains AQI: 140 Ozone San Bernardino Valley AQI: 136 Ozone San Gabriel Mountains AQI: 101 Ozone San Gabriel Valley AQI: 136 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cooling temperatures on Monday and decreasing clouds. Onshore pressure gradients. Inversion Base: 1531 FT | Breaking Temperature: 89 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2145 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 9, 10, 15, 23, 24, 29, 32, 33, 34, 35, 36, 37 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 MONDAY, JULY 27, 2026 IN THE SOUTH COAST AIR BASIN.