SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., APR. 09, 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 55 48 0.5 27 11 20 55 2 NW Coastal LA 52 44 0.3 26 10 12 53 3 SW Coastal LA 47 38 0.3 26 9 12 50 4 S Coastal LA 51 45 0.2 24 8 18 44 5 Southeast LA Co 52 47 0.5 26 10 17 53 6 W San Fernando Vly 55 47 0.3 25 10 12 53 7 E San Fernando Vly 60 52 0.4 28 10 17 53 8 W San Gabriel Vly 58 53 0.3 29 11 14 55 9 E San Gabriel Vly 66 57 0.3 31 10 22 58 10 Pomona Walnut Vly 66 56 0.4 31 13 18 58 11 S San Gabriel Vly 55 51 0.3 28 11 14 55 12 S Central LA Co 51 45 0.5 26 10 13 53 13 Santa Clarita Vly 68 54 0.2 26 8 18 50 15 San Gabriel Mts 61 52 0.3 31 9 18 50 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 57 53 0.3 27 10 11 53 Orange County: South Coast Air Basin 16 N Orange Co 56 51 0.2 28 11 9 55 17 Central Orange Co 46 43 0.4 17 9 13 50 18 N Coastal Orange Co 48 44 0.2 20 6 16 41 19 Saddleback Vly 52 49 0.2 28 6 14 45 20 Central Coastal 50 46 0.3 20 6 13 43 21 Capistrano Vly 49 45 0.3 31 6 11 42 Riverside County: South Coast Air Basin 22 Norco/Corona 61 53 0.4 39 14 15 60 23 Metro Riverside Co 66 55 0.6 44 17 15 66 24 Perris Vly 59 53 0.4 36 9 18 50 25 Lake Elsinore 56 50 0.3 18 8 11 46 26 Temecula Vly 50 47 0.3 48 8 10 44 27 Anza Vly 54 52 0.2 59 6 10 53 28 Hemet/San Jacinto 59 55 0.3 42 8 18 51 29 Banning 63 58 0.3 36 9 15 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 68 60 0.2 80 6 9 67 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 62 58 0.2 41 6 8 61 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 69 58 0.4 18 14 18 61 33 SW San Bernardino Vly 64 56 0.4 38 19 22 69 34 C San Bernardino Vly 83 71 0.4 37 12 26 101 35 E San Bernardino Vly 65 58 0.5 37 10 21 61 36 W San Bernardino Mtns 66 56 0.3 28 10 20 54 37 C San Bernardino Mtns 74 66 0.4 37 6 21 87 38 Big Bear Lake 64 60 0.3 36 6 19 67 San Bernardino County: Mojave Desert Air Basin 39 Phelan 60 54 0.3 29 6 13 50 40 Hesperia 62 56 0.3 31 9 18 54 41 Trona 55 47 0.2 25 6 41 44 42 Victorville 66 59 0.3 31 9 11 64 43 Yucca Vly 65 59 0.2 36 6 9 64 44 Barstow 60 55 0.3 28 6 7 51 45 Twentynine Palms 60 58 0.2 36 6 8 61 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., APR. 09, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Inland Orange County AQI: 50 PM2.5 San Gabriel Mountains AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Banning Pass Area AQI: 61 Ozone Big Bear Lake AQI: 67 Ozone Central Mojave Desert AQI: 64 Ozone Coachella Valley/Low Desert AQI: 67 Ozone Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 51 Ozone Metropolitan Area AQI: 55 PM2.5 Northern Mojave Desert AQI: 51 Ozone Riverside Valley AQI: 66 PM2.5 San Bernardino Mountains AQI: 87 Ozone San Fernando/Santa Clarita Valleys AQI: 53 PM2.5 San Gabriel Valley AQI: 58 PM2.5 Temecula/Anza Area AQI: 53 PM10 Victor Valley AQI: 64 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Valley AQI: 101 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cooling and increasing ventilation on Thursday. Inversion Base: 1557 FT | Breaking Temperature: 73 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2476 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 34 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, APRIL 09, 2026 IN THE SOUTH COAST AIR BASIN.