SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., MAY. 28, 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 42 41 0.4 15 5 21 38 2 NW Coastal LA 39 36 0.3 15 5 15 33 3 SW Coastal LA 35 33 0.2 19 5 11 31 4 S Coastal LA 44 42 0.2 28 5 18 39 5 Southeast LA Co 44 42 0.3 28 6 23 39 6 W San Fernando Vly 46 44 0.3 14 4 11 41 7 E San Fernando Vly 42 41 0.3 15 4 16 38 8 W San Gabriel Vly 44 43 0.2 18 5 10 40 9 E San Gabriel Vly 50 46 0.3 17 5 18 43 10 Pomona Walnut Vly 48 44 0.2 28 6 20 41 11 S San Gabriel Vly 46 44 0.3 27 6 23 41 12 S Central LA Co 42 40 0.3 21 6 17 37 13 Santa Clarita Vly 46 43 0.2 15 5 10 40 15 San Gabriel Mts 46 43 0.2 27 5 14 40 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 49 47 0.2 16 7 6 44 Orange County: South Coast Air Basin 16 N Orange Co 46 43 0.2 32 6 13 40 17 Central Orange Co 41 38 0.2 32 6 13 35 18 N Coastal Orange Co 42 40 0.2 27 4 16 37 19 Saddleback Vly 41 40 0.2 26 2 12 37 20 Central Coastal 40 39 0.2 23 3 10 36 21 Capistrano Vly 38 37 0.2 24 3 7 34 Riverside County: South Coast Air Basin 22 Norco/Corona 47 44 0.2 25 5 13 41 23 Metro Riverside Co 51 47 0.4 21 6 12 44 24 Perris Vly 41 40 0.2 21 4 11 37 25 Lake Elsinore 43 40 0.1 11 4 5 37 26 Temecula Vly 39 37 0.1 38 4 5 35 27 Anza Vly 47 44 0.2 56 5 5 51 28 Hemet/San Jacinto 44 41 0.2 32 4 10 38 29 Banning 47 44 0.2 23 3 4 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 55 51 0.2 69 12 5 58 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 50 47 0.1 42 10 5 53 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 49 44 0.3 33 6 11 41 33 SW San Bernardino Vly 48 44 0.2 29 6 17 41 34 C San Bernardino Vly 53 47 0.2 23 5 17 44 35 E San Bernardino Vly 52 46 0.3 23 4 12 43 36 W San Bernardino Mtns 52 47 0.2 27 5 14 44 37 C San Bernardino Mtns 55 47 0.2 23 4 15 44 38 Big Bear Lake 55 52 0.2 32 5 12 48 San Bernardino County: Mojave Desert Air Basin 39 Phelan 54 50 0.2 20 4 14 46 40 Hesperia 52 46 0.2 20 4 15 43 41 Trona 54 50 0.1 18 6 11 46 42 Victorville 56 49 0.2 20 5 15 45 43 Yucca Vly 53 52 0.2 44 7 10 48 44 Barstow 68 62 0.2 22 5 22 74 45 Twentynine Palms 51 49 0.2 44 8 9 45 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., MAY. 28, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 44 Ozone Banning Pass Area AQI: 41 Ozone Big Bear Lake AQI: 48 Ozone Central Mojave Desert AQI: 48 Ozone Coastal Area AQI: 39 Ozone Hemet/Elsinore Area AQI: 38 Ozone Inland Orange County AQI: 37 Ozone Metropolitan Area AQI: 40 Ozone Riverside Valley AQI: 44 Ozone San Bernardino Mountains AQI: 44 Ozone San Bernardino Valley AQI: 44 Ozone San Fernando/Santa Clarita Valleys AQI: 41 Ozone San Gabriel Mountains AQI: 40 Ozone San Gabriel Valley AQI: 43 Ozone Victor Valley AQI: 46 Ozone MODERATE in the following area(s): Coachella Valley/Low Desert AQI: 58 PM10 Northern Mojave Desert AQI: 74 Ozone Temecula/Anza Area AQI: 51 PM10 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ High temperatures will remain below average but trend a few degrees warmer than Wednesday. Gusty southwest to west winds will continue in the mountains and deserts. Inversion Base: 6034 FT | Breaking Temperature: 76 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 6366 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: 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 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 THURSDAY, MAY 28, 2026 IN THE SOUTH COAST AIR BASIN.