SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., SEP. 14, 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 54 44 0.7 38 13 23 58 2 NW Coastal LA 44 42 0.4 35 10 16 53 3 SW Coastal LA 40 37 0.4 36 9 10 50 4 S Coastal LA 39 34 0.4 35 9 21 50 5 Southeast LA Co 48 40 0.6 37 11 21 55 6 W San Fernando Vly 61 55 0.4 34 11 16 55 7 E San Fernando Vly 56 51 0.6 38 13 19 58 8 W San Gabriel Vly 59 49 0.5 38 13 15 58 9 E San Gabriel Vly 67 57 0.5 34 12 17 58 10 Pomona Walnut Vly 66 54 0.4 38 13 23 58 11 S San Gabriel Vly 53 44 0.4 37 12 21 56 12 S Central LA Co 45 38 0.3 37 10 14 53 13 Santa Clarita Vly 79 66 0.3 37 13 17 87 15 San Gabriel Mts 68 59 0.5 39 13 19 64 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 67 58 0.3 40 13 18 61 Orange County: South Coast Air Basin 16 N Orange Co 51 42 0.2 38 11 11 55 17 Central Orange Co 47 39 0.3 35 11 7 55 18 N Coastal Orange Co 43 37 0.4 33 7 17 39 19 Saddleback Vly 53 45 0.3 37 6 12 42 20 Central Coastal 47 41 0.3 29 6 12 38 21 Capistrano Vly 46 40 0.3 29 8 11 44 Riverside County: South Coast Air Basin 22 Norco/Corona 66 55 0.4 44 11 14 55 23 Metro Riverside Co 72 59 0.5 47 14 12 64 24 Perris Vly 66 60 0.4 32 10 22 67 25 Lake Elsinore 55 49 0.3 21 11 11 55 26 Temecula Vly 48 43 0.3 37 10 11 53 27 Anza Vly 59 53 0.3 42 6 11 49 28 Hemet/San Jacinto 58 52 0.4 35 9 23 50 29 Banning 59 54 0.3 33 8 22 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 69 60 0.3 52 7 11 67 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 40 37 0.2 36 6 10 34 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 68 57 0.5 38 14 20 60 33 SW San Bernardino Vly 67 54 0.4 44 13 22 58 34 C San Bernardino Vly 75 65 0.4 31 12 26 84 35 E San Bernardino Vly 72 63 0.5 33 10 25 77 36 W San Bernardino Mtns 72 62 0.4 36 11 25 74 37 C San Bernardino Mtns 90 75 0.4 32 7 28 115 38 Big Bear Lake 58 55 0.4 34 6 26 51 San Bernardino County: Mojave Desert Air Basin 39 Phelan 67 62 0.4 34 7 28 74 40 Hesperia 69 60 0.4 31 8 31 67 41 Trona 52 46 0.2 26 6 18 43 42 Victorville 71 62 0.3 32 9 31 74 43 Yucca Vly 59 54 0.3 37 6 19 50 44 Barstow 61 56 0.3 28 8 39 54 45 Twentynine Palms 49 47 0.3 36 6 17 44 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., SEP. 14, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 50 Ozone Central Mojave Desert AQI: 50 Ozone MODERATE in the following area(s): Antelope Valley AQI: 61 Ozone Big Bear Lake AQI: 51 Ozone Coachella Valley/Low Desert AQI: 67 Ozone Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 67 Ozone Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 54 Ozone Riverside Valley AQI: 64 Ozone San Bernardino Valley AQI: 84 Ozone San Fernando/Santa Clarita Valleys AQI: 87 Ozone San Gabriel Mountains AQI: 64 Ozone San Gabriel Valley AQI: 58 PM2.5 Temecula/Anza Area AQI: 53 PM2.5 Victor Valley AQI: 74 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 115 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ A Pacific trough will continue to influence SoCal weather on Monday, with a cloudy start to the day followed by mostly sunny skies. Temperatures will be within a degree or two of Sunday, and onshore winds will gust up to 20 mph at times. Inversion Base: 2197 FT | Breaking Temperature: 85 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2615 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 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, SEPTEMBER 14, 2026 IN THE SOUTH COAST AIR BASIN.