SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., JUN. 20, 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 44 40 0.6 20 9 20 50 2 NW Coastal LA 37 35 0.3 21 6 10 33 3 SW Coastal LA 35 34 0.2 24 5 11 31 4 S Coastal LA 39 35 0.2 28 6 10 33 5 Southeast LA Co 43 39 0.4 29 8 19 44 6 W San Fernando Vly 49 45 0.3 22 7 11 42 7 E San Fernando Vly 51 47 0.4 22 9 15 50 8 W San Gabriel Vly 51 46 0.2 25 10 11 53 9 E San Gabriel Vly 60 52 0.3 29 9 12 50 10 Pomona Walnut Vly 59 53 0.3 37 9 20 50 11 S San Gabriel Vly 47 42 0.3 31 9 19 50 12 S Central LA Co 37 35 0.2 25 7 13 39 13 Santa Clarita Vly 59 52 0.2 23 10 15 53 15 San Gabriel Mts 58 52 0.3 36 9 14 50 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 61 57 0.2 28 10 7 58 Orange County: South Coast Air Basin 16 N Orange Co 49 43 0.1 34 8 10 44 17 Central Orange Co 43 38 0.1 31 8 7 44 18 N Coastal Orange Co 41 37 0.2 28 5 9 34 19 Saddleback Vly 49 45 0.1 33 4 10 42 20 Central Coastal 44 40 0.2 28 4 9 37 21 Capistrano Vly 41 38 0.2 30 4 10 35 Riverside County: South Coast Air Basin 22 Norco/Corona 52 47 0.3 38 9 12 50 23 Metro Riverside Co 57 51 0.4 39 10 13 53 24 Perris Vly 56 52 0.3 33 9 19 50 25 Lake Elsinore 52 47 0.2 25 7 10 44 26 Temecula Vly 42 38 0.2 37 8 9 44 27 Anza Vly 51 48 0.2 42 6 9 44 28 Hemet/San Jacinto 54 51 0.3 32 9 18 50 29 Banning 63 58 0.2 30 8 13 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 51 11 9 93 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 64 60 0.2 33 8 8 67 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 62 56 0.3 41 10 11 54 33 SW San Bernardino Vly 56 51 0.3 40 10 17 53 34 C San Bernardino Vly 65 59 0.3 35 9 25 64 35 E San Bernardino Vly 63 59 0.3 34 8 22 64 36 W San Bernardino Mtns 66 60 0.3 36 9 17 67 37 C San Bernardino Mtns 70 61 0.3 34 6 23 71 38 Big Bear Lake 61 59 0.3 32 5 20 64 San Bernardino County: Mojave Desert Air Basin 39 Phelan 69 64 0.2 29 6 15 80 40 Hesperia 62 59 0.3 25 7 20 64 41 Trona 59 55 0.2 28 5 18 51 42 Victorville 66 63 0.2 27 9 15 77 43 Yucca Vly 61 58 0.2 30 6 13 61 44 Barstow 70 64 0.2 29 7 21 80 45 Twentynine Palms 61 59 0.2 30 8 12 64 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., JUN. 20, 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: 50 PM2.5 Inland Orange County AQI: 44 PM2.5 Metropolitan Area AQI: 50 PM2.5 San Gabriel Mountains AQI: 50 PM2.5 Temecula/Anza Area AQI: 44 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 58 Ozone Banning Pass Area AQI: 61 Ozone Big Bear Lake AQI: 64 Ozone Central Mojave Desert AQI: 64 Ozone Coachella Valley/Low Desert AQI: 93 Ozone Northern Mojave Desert AQI: 80 Ozone Riverside Valley AQI: 53 PM2.5 San Bernardino Mountains AQI: 71 Ozone San Bernardino Valley AQI: 64 Ozone San Fernando/Santa Clarita Valleys AQI: 53 PM2.5 San Gabriel Valley AQI: 53 PM2.5 Victor Valley AQI: 80 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy skies with cooler temperatures are expected. Inversion Base: 2293 FT | Breaking Temperature: 79 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2751 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 SATURDAY, JUNE 20, 2026 IN THE SOUTH COAST AIR BASIN.