SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., JUN. 18, 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 0.4 22 10 19 53 2 NW Coastal LA 39 37 0.2 23 6 10 34 3 SW Coastal LA 38 36 0.1 22 6 8 33 4 S Coastal LA 40 35 0.2 22 7 18 39 5 Southeast LA Co 42 37 0.3 23 9 15 50 6 W San Fernando Vly 50 45 0.2 23 8 9 44 7 E San Fernando Vly 52 46 0.3 24 11 14 55 8 W San Gabriel Vly 46 43 0.2 25 13 9 58 9 E San Gabriel Vly 56 50 0.4 25 11 18 55 10 Pomona Walnut Vly 55 51 0.3 32 10 17 53 11 S San Gabriel Vly 46 41 0.3 24 10 13 53 12 S Central LA Co 40 35 0.1 22 8 10 44 13 Santa Clarita Vly 67 56 0.2 25 11 11 55 15 San Gabriel Mts 59 53 0.4 32 12 14 56 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 73 66 0.2 30 11 11 87 Orange County: South Coast Air Basin 16 N Orange Co 44 40 0.1 26 9 7 50 17 Central Orange Co 41 37 0.2 21 9 7 50 18 N Coastal Orange Co 42 37 0.2 21 6 14 34 19 Saddleback Vly 46 43 0.1 26 6 8 40 20 Central Coastal 40 39 0.2 21 6 8 36 21 Capistrano Vly 38 36 0.2 33 8 6 44 Riverside County: South Coast Air Basin 22 Norco/Corona 52 48 0.2 32 9 9 50 23 Metro Riverside Co 58 53 0.3 33 12 8 56 24 Perris Vly 62 55 0.3 31 11 13 55 25 Lake Elsinore 60 46 0.2 19 11 4 55 26 Temecula Vly 41 39 0.2 50 6 5 46 27 Anza Vly 48 45 0.2 60 6 6 53 28 Hemet/San Jacinto 53 49 0.2 41 8 12 45 29 Banning 60 57 0.2 31 9 7 58 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 70 64 0.2 82 16 8 80 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 56 54 0.2 40 9 7 50 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 60 55 0.3 36 12 12 56 33 SW San Bernardino Vly 54 49 0.3 35 10 16 53 34 C San Bernardino Vly 66 59 0.2 33 11 19 64 35 E San Bernardino Vly 72 63 0.3 32 13 15 77 36 W San Bernardino Mtns 67 61 0.3 33 13 18 71 37 C San Bernardino Mtns 79 72 0.2 33 8 20 105 38 Big Bear Lake 70 65 0.2 32 6 17 84 San Bernardino County: Mojave Desert Air Basin 39 Phelan 70 65 0.2 29 9 21 84 40 Hesperia 69 63 0.2 28 10 22 77 41 Trona 58 55 0.1 29 8 27 51 42 Victorville 72 66 0.2 29 10 23 87 43 Yucca Vly 64 61 0.2 31 9 14 71 44 Barstow 73 68 0.2 29 9 31 93 45 Twentynine Palms 61 59 0.2 32 11 13 64 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., JUN. 18, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 39 PM2.5 Inland Orange County AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 87 Ozone Banning Pass Area AQI: 58 Ozone Big Bear Lake AQI: 84 Ozone Central Mojave Desert AQI: 71 Ozone Coachella Valley/Low Desert AQI: 80 Ozone Hemet/Elsinore Area AQI: 55 PM2.5 Metropolitan Area AQI: 53 PM2.5 Northern Mojave Desert AQI: 93 Ozone Riverside Valley AQI: 56 PM2.5 San Bernardino Valley AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 55 PM2.5 San Gabriel Mountains AQI: 56 PM2.5 San Gabriel Valley AQI: 58 PM2.5 Temecula/Anza Area AQI: 53 PM10 Victor Valley AQI: 87 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cooler temperatures are expected, with mostly sunny skies inland while mostly cloudy conditions along the coast. Inversion Base: 3012 FT | Breaking Temperature: 83 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 3031 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 THURSDAY, JUNE 18, 2026 IN THE SOUTH COAST AIR BASIN.