SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., JUN. 21, 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 45 41 0.6 21 8 13 44 2 NW Coastal LA 38 35 0.2 22 5 9 32 3 SW Coastal LA 37 33 0.1 26 5 5 31 4 S Coastal LA 35 35 0.2 34 6 9 33 5 Southeast LA Co 43 38 0.4 34 8 12 44 6 W San Fernando Vly 51 46 0.2 23 7 7 43 7 E San Fernando Vly 55 50 0.4 23 9 11 50 8 W San Gabriel Vly 51 46 0.2 25 10 9 53 9 E San Gabriel Vly 63 55 0.3 27 10 10 53 10 Pomona Walnut Vly 64 56 0.3 38 9 13 54 11 S San Gabriel Vly 49 43 0.3 34 9 12 50 12 S Central LA Co 37 35 0.2 27 7 8 39 13 Santa Clarita Vly 65 57 0.2 25 9 10 58 15 San Gabriel Mts 62 56 0.3 37 10 10 54 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 64 61 0.2 33 10 10 71 Orange County: South Coast Air Basin 16 N Orange Co 46 41 0.1 38 7 7 39 17 Central Orange Co 40 37 0.3 38 7 5 39 18 N Coastal Orange Co 39 37 0.2 33 4 8 34 19 Saddleback Vly 48 45 0.2 34 3 6 42 20 Central Coastal 42 40 0.2 31 3 5 37 21 Capistrano Vly 39 37 0.2 31 3 4 34 Riverside County: South Coast Air Basin 22 Norco/Corona 56 49 0.3 35 8 8 45 23 Metro Riverside Co 66 56 0.4 34 10 7 54 24 Perris Vly 57 52 0.3 34 8 12 48 25 Lake Elsinore 45 42 0.2 23 5 4 39 26 Temecula Vly 38 36 0.2 40 7 5 39 27 Anza Vly 49 47 0.2 47 5 7 44 28 Hemet/San Jacinto 52 48 0.3 36 7 13 44 29 Banning 64 56 0.3 32 7 13 54 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 72 68 0.2 59 9 9 93 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 57 55 0.1 35 6 7 51 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 64 56 0.3 43 10 9 54 33 SW San Bernardino Vly 60 52 0.3 40 9 12 50 34 C San Bernardino Vly 70 61 0.3 36 9 15 71 35 E San Bernardino Vly 70 62 0.3 35 8 14 74 36 W San Bernardino Mtns 67 62 0.3 37 9 14 74 37 C San Bernardino Mtns 76 66 0.3 34 6 16 87 38 Big Bear Lake 64 61 0.3 33 5 16 71 San Bernardino County: Mojave Desert Air Basin 39 Phelan 70 65 0.3 30 7 16 84 40 Hesperia 67 63 0.3 26 7 18 77 41 Trona 63 58 0.1 26 6 19 61 42 Victorville 75 71 0.3 28 8 17 101 43 Yucca Vly 63 59 0.2 30 6 13 64 44 Barstow 69 66 0.2 26 7 26 87 45 Twentynine Palms 60 58 0.2 31 7 12 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., JUN. 21, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 37 Ozone Hemet/Elsinore Area AQI: 48 Ozone Inland Orange County AQI: 42 Ozone Metropolitan Area AQI: 44 PM2.5 Temecula/Anza Area AQI: 44 Ozone MODERATE in the following area(s): Antelope Valley AQI: 71 Ozone Banning Pass Area AQI: 54 Ozone Big Bear Lake AQI: 71 Ozone Central Mojave Desert AQI: 64 Ozone Coachella Valley/Low Desert AQI: 93 Ozone Northern Mojave Desert AQI: 87 Ozone Riverside Valley AQI: 54 Ozone San Bernardino Mountains AQI: 87 Ozone San Bernardino Valley AQI: 74 Ozone San Fernando/Santa Clarita Valleys AQI: 58 Ozone San Gabriel Mountains AQI: 54 Ozone San Gabriel Valley AQI: 54 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Victor Valley AQI: 101 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies are expected. Inversion Base: 2235 FT | Breaking Temperature: 80 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 3034 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 SUNDAY, JUNE 21, 2026 IN THE SOUTH COAST AIR BASIN.