SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., APR. 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 56 52 0.5 12 5 21 48 2 NW Coastal LA 49 47 0.3 12 5 12 44 3 SW Coastal LA 47 45 0.3 14 7 9 42 4 S Coastal LA 56 53 0.3 17 8 16 49 5 Southeast LA Co 56 52 0.4 18 7 18 48 6 W San Fernando Vly 54 52 0.3 13 4 11 48 7 E San Fernando Vly 58 56 0.4 13 5 16 54 8 W San Gabriel Vly 60 55 0.3 15 5 13 51 9 E San Gabriel Vly 59 55 0.3 17 3 13 51 10 Pomona Walnut Vly 56 49 0.4 26 5 20 45 11 S San Gabriel Vly 58 54 0.4 19 6 16 50 12 S Central LA Co 55 51 0.4 15 10 16 53 13 Santa Clarita Vly 58 54 0.2 14 5 10 50 15 San Gabriel Mts 57 54 0.3 21 5 13 50 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 61 56 0.2 17 7 10 54 Orange County: South Coast Air Basin 16 N Orange Co 56 52 0.2 27 6 18 48 17 Central Orange Co 49 46 0.3 19 6 11 43 18 N Coastal Orange Co 53 51 0.3 17 5 14 47 19 Saddleback Vly 52 50 0.2 27 3 11 46 20 Central Coastal 52 50 0.2 15 4 10 46 21 Capistrano Vly 50 49 0.2 22 4 8 45 Riverside County: South Coast Air Basin 22 Norco/Corona 57 54 0.3 38 8 13 50 23 Metro Riverside Co 62 58 0.3 43 11 13 61 24 Perris Vly 55 52 0.3 24 6 11 48 25 Lake Elsinore 53 52 0.2 10 3 7 48 26 Temecula Vly 48 44 0.2 37 4 7 41 27 Anza Vly 54 51 0.2 47 4 7 47 28 Hemet/San Jacinto 54 50 0.2 37 4 10 46 29 Banning 56 52 0.2 34 4 9 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 61 60 0.2 68 10 7 67 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 56 54 0.2 40 6 8 50 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 57 52 0.3 25 7 9 48 33 SW San Bernardino Vly 56 52 0.3 38 8 18 48 34 C San Bernardino Vly 60 56 0.3 19 8 16 54 35 E San Bernardino Vly 61 57 0.3 28 6 12 58 36 W San Bernardino Mtns 60 55 0.2 21 6 12 51 37 C San Bernardino Mtns 55 53 0.2 23 5 11 49 38 Big Bear Lake 56 53 0.2 33 7 12 49 San Bernardino County: Mojave Desert Air Basin 39 Phelan 59 55 0.2 15 5 11 51 40 Hesperia 57 55 0.2 15 6 12 51 41 Trona 53 51 0.2 12 6 12 47 42 Victorville 59 58 0.2 13 6 12 61 43 Yucca Vly 59 58 0.2 45 7 11 61 44 Barstow 59 57 0.2 10 5 19 58 45 Twentynine Palms 59 56 0.2 42 7 10 54 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., APR. 27, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 48 Ozone Big Bear Lake AQI: 49 Ozone Coastal Area AQI: 49 Ozone Hemet/Elsinore Area AQI: 48 Ozone Inland Orange County AQI: 46 Ozone San Gabriel Mountains AQI: 50 Ozone Temecula/Anza Area AQI: 47 Ozone MODERATE in the following area(s): Antelope Valley AQI: 54 Ozone Central Mojave Desert AQI: 61 Ozone Coachella Valley/Low Desert AQI: 67 Ozone Metropolitan Area AQI: 53 PM2.5 Northern Mojave Desert AQI: 58 Ozone Riverside Valley AQI: 61 Ozone San Bernardino Mountains AQI: 51 Ozone San Bernardino Valley AQI: 58 Ozone San Fernando/Santa Clarita Valleys AQI: 54 Ozone San Gabriel Valley AQI: 51 Ozone Victor Valley AQI: 61 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Breezy west winds will continue in the mountains and deserts. High temperatures will remain below average but slightly warmer than Sunday. Inversion Base: 6901 FT | Breaking Temperature: 71 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 6701 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: 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, APRIL 27, 2026 IN THE SOUTH COAST AIR BASIN.