SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: WED., JUN. 17, 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 48 45 0.4 25 12 20 56 2 NW Coastal LA 43 40 0.2 23 9 11 50 3 SW Coastal LA 38 35 0.2 23 8 8 44 4 S Coastal LA 42 38 0.2 21 7 19 39 5 Southeast LA Co 46 41 0.3 24 10 16 53 6 W San Fernando Vly 62 55 0.3 23 10 10 53 7 E San Fernando Vly 56 52 0.3 26 12 16 56 8 W San Gabriel Vly 56 53 0.2 28 13 15 58 9 E San Gabriel Vly 65 60 0.4 30 12 17 67 10 Pomona Walnut Vly 61 56 0.3 33 14 15 60 11 S San Gabriel Vly 52 47 0.3 26 11 12 55 12 S Central LA Co 43 38 0.2 23 10 9 53 13 Santa Clarita Vly 79 67 0.2 25 13 14 90 15 San Gabriel Mts 69 63 0.4 33 13 16 77 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 80 71 0.2 29 11 13 101 Orange County: South Coast Air Basin 16 N Orange Co 49 44 0.1 26 11 8 55 17 Central Orange Co 43 39 0.2 13 10 7 53 18 N Coastal Orange Co 41 38 0.2 18 7 16 39 19 Saddleback Vly 46 42 0.1 26 15 11 62 20 Central Coastal 42 39 0.2 21 7 11 39 21 Capistrano Vly 41 36 0.2 25 10 11 53 Riverside County: South Coast Air Basin 22 Norco/Corona 57 51 0.3 37 16 11 64 23 Metro Riverside Co 65 58 0.3 40 16 11 64 24 Perris Vly 65 60 0.3 36 19 18 69 25 Lake Elsinore 59 51 0.2 34 29 11 88 26 Temecula Vly 47 42 0.2 33 14 11 60 27 Anza Vly 55 49 0.2 41 12 11 56 28 Hemet/San Jacinto 61 56 0.3 43 17 18 66 29 Banning 70 64 0.2 45 11 16 80 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 71 67 0.2 51 23 12 90 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 56 52 0.2 28 14 10 60 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 65 61 0.3 36 15 17 71 33 SW San Bernardino Vly 59 54 0.3 38 17 20 66 34 C San Bernardino Vly 68 63 0.3 33 12 23 77 35 E San Bernardino Vly 73 68 0.3 41 11 20 93 36 W San Bernardino Mtns 69 66 0.3 33 11 19 87 37 C San Bernardino Mtns 77 73 0.3 36 7 21 108 38 Big Bear Lake 66 60 0.3 40 7 20 67 San Bernardino County: Mojave Desert Air Basin 39 Phelan 79 72 0.3 29 7 14 105 40 Hesperia 63 61 0.3 27 8 19 71 41 Trona 59 56 0.2 23 8 17 54 42 Victorville 73 68 0.2 28 10 13 93 43 Yucca Vly 64 59 0.2 35 11 17 64 44 Barstow 77 68 0.2 27 8 32 93 45 Twentynine Palms 63 58 0.2 31 13 16 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON WED., JUN. 17, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 50 PM2.5 MODERATE in the following area(s): Banning Pass Area AQI: 80 Ozone Big Bear Lake AQI: 67 Ozone Central Mojave Desert AQI: 64 Ozone Coachella Valley/Low Desert AQI: 90 Ozone Hemet/Elsinore Area AQI: 88 PM2.5 Inland Orange County AQI: 62 PM2.5 Metropolitan Area AQI: 56 PM2.5 Northern Mojave Desert AQI: 93 Ozone Riverside Valley AQI: 64 PM2.5 San Bernardino Valley AQI: 93 Ozone San Fernando/Santa Clarita Valleys AQI: 90 Ozone San Gabriel Mountains AQI: 77 Ozone San Gabriel Valley AQI: 67 Ozone Temecula/Anza Area AQI: 60 PM2.5 UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Antelope Valley AQI: 101 Ozone San Bernardino Mountains AQI: 108 Ozone Victor Valley AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies with patchy morning fog along the coast are expected. Inversion Base: 2245 FT | Breaking Temperature: 81 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2516 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 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 WEDNESDAY, JUNE 17, 2026 IN THE SOUTH COAST AIR BASIN.