SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., MAR. 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 48 44 0.7 27 10 31 53 2 NW Coastal LA 50 46 0.7 26 8 27 44 3 SW Coastal LA 45 41 0.4 26 9 33 50 4 S Coastal LA 48 45 0.3 27 10 25 53 5 Southeast LA Co 48 45 0.8 28 9 30 50 6 W San Fernando Vly 48 44 1.0 25 7 28 41 7 E San Fernando Vly 51 46 0.8 27 8 29 44 8 W San Gabriel Vly 49 45 0.4 28 9 28 50 9 E San Gabriel Vly 52 48 0.5 30 7 31 44 10 Pomona Walnut Vly 52 47 0.5 32 9 38 50 11 S San Gabriel Vly 50 46 0.7 29 9 30 50 12 S Central LA Co 49 45 0.8 27 10 25 53 13 Santa Clarita Vly 59 52 0.4 25 7 20 48 15 San Gabriel Mts 53 49 0.6 30 8 28 45 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 55 51 0.4 25 11 26 55 Orange County: South Coast Air Basin 16 N Orange Co 51 48 0.4 34 9 21 50 17 Central Orange Co 43 39 0.4 28 8 26 44 18 N Coastal Orange Co 44 43 0.3 27 6 25 40 19 Saddleback Vly 47 46 0.2 34 4 27 43 20 Central Coastal 46 45 0.3 26 5 23 42 21 Capistrano Vly 47 46 0.3 32 4 22 43 Riverside County: South Coast Air Basin 22 Norco/Corona 52 49 0.5 42 11 30 55 23 Metro Riverside Co 58 50 0.6 46 14 31 60 24 Perris Vly 57 50 0.5 41 8 30 46 25 Lake Elsinore 55 50 0.3 25 7 21 46 26 Temecula Vly 48 45 0.3 41 5 21 42 27 Anza Vly 46 45 0.3 46 4 20 43 28 Hemet/San Jacinto 51 48 0.5 36 5 31 44 29 Banning 50 49 0.5 33 4 30 45 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 50 48 0.3 58 7 20 52 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 47 44 0.3 35 4 20 41 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 62 55 0.6 24 10 28 53 33 SW San Bernardino Vly 53 48 0.5 41 11 35 55 34 C San Bernardino Vly 60 50 0.6 44 10 40 53 35 E San Bernardino Vly 58 50 0.6 42 8 32 46 36 W San Bernardino Mtns 59 52 0.5 28 8 34 48 37 C San Bernardino Mtns 63 57 0.6 40 5 35 58 38 Big Bear Lake 51 49 0.6 37 6 34 45 San Bernardino County: Mojave Desert Air Basin 39 Phelan 50 48 0.5 25 5 36 44 40 Hesperia 59 51 0.5 23 6 38 47 41 Trona 56 48 0.3 29 4 22 44 42 Victorville 60 50 0.5 27 7 38 46 43 Yucca Vly 52 48 0.4 29 4 28 44 44 Barstow 50 48 0.4 33 4 49 46 45 Twentynine Palms 46 44 0.3 31 4 27 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., MAR. 09, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 45 Ozone Big Bear Lake AQI: 45 Ozone Central Mojave Desert AQI: 44 Ozone Hemet/Elsinore Area AQI: 46 Ozone Inland Orange County AQI: 44 PM2.5 Northern Mojave Desert AQI: 46 NO2 San Fernando/Santa Clarita Valleys AQI: 48 Ozone San Gabriel Mountains AQI: 45 Ozone San Gabriel Valley AQI: 50 PM2.5 Temecula/Anza Area AQI: 43 PM10 Victor Valley AQI: 47 Ozone MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Coachella Valley/Low Desert AQI: 52 PM10 Coastal Area AQI: 53 PM2.5 Metropolitan Area AQI: 53 PM2.5 Riverside Valley AQI: 60 PM2.5 San Bernardino Mountains AQI: 58 Ozone San Bernardino Valley AQI: 55 PM2.5 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Santa Ana winds will weaken. Cooler conditions are expected as the low pressure system begins to move northeast. Inversion Base: 486 FT | Breaking Temperature: 50 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 4693 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 Below 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 MONDAY, MARCH 09, 2026 IN THE SOUTH COAST AIR BASIN.