SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., SEP. 14, 2025 -------------------------------------------------------------------------------- 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 59 53 0.8 35 13 15 58 2 NW Coastal LA 48 44 0.4 32 11 11 55 3 SW Coastal LA 39 36 0.1 32 9 9 50 4 S Coastal LA 48 41 0.2 30 8 13 44 5 Southeast LA Co 59 51 0.6 33 10 15 53 6 W San Fernando Vly 67 61 0.4 30 10 11 71 7 E San Fernando Vly 65 59 0.6 35 14 13 64 8 W San Gabriel Vly 68 56 0.3 38 13 10 58 9 E San Gabriel Vly 81 70 0.3 44 12 11 100 10 Pomona Walnut Vly 72 63 0.4 44 13 20 77 11 S San Gabriel Vly 66 55 0.3 38 11 15 55 12 S Central LA Co 54 47 0.3 32 10 8 53 13 Santa Clarita Vly 85 70 0.2 32 13 13 100 15 San Gabriel Mts 73 64 0.4 44 12 16 80 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 67 60 0.3 31 11 13 67 Orange County: South Coast Air Basin 16 N Orange Co 62 54 0.2 37 11 10 55 17 Central Orange Co 53 47 0.3 19 10 8 53 18 N Coastal Orange Co 45 39 0.2 24 8 11 44 19 Saddleback Vly 52 48 0.2 37 10 9 53 20 Central Coastal 48 42 0.2 25 8 9 44 21 Capistrano Vly 48 43 0.3 36 8 7 44 Riverside County: South Coast Air Basin 22 Norco/Corona 65 60 0.4 53 13 11 67 23 Metro Riverside Co 70 66 0.6 60 15 14 87 24 Perris Vly 68 65 0.4 40 13 21 84 25 Lake Elsinore 64 60 0.3 26 10 7 67 26 Temecula Vly 52 47 0.3 51 8 8 47 27 Anza Vly 56 53 0.2 61 8 9 54 28 Hemet/San Jacinto 65 61 0.3 42 11 23 71 29 Banning 78 66 0.3 35 10 21 87 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 66 61 0.2 80 9 11 71 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 50 47 0.2 40 8 10 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 82 74 0.6 40 15 14 112 33 SW San Bernardino Vly 71 64 0.5 53 14 20 80 34 C San Bernardino Vly 79 73 0.4 42 13 25 108 35 E San Bernardino Vly 81 74 0.5 41 12 25 112 36 W San Bernardino Mtns 79 73 0.4 40 12 25 108 37 C San Bernardino Mtns 76 69 0.3 41 8 30 97 38 Big Bear Lake 65 62 0.3 38 8 28 74 San Bernardino County: Mojave Desert Air Basin 39 Phelan 68 64 0.3 35 9 31 80 40 Hesperia 67 64 0.3 32 10 34 80 41 Trona 63 57 0.1 30 8 14 58 42 Victorville 70 67 0.3 34 11 35 90 43 Yucca Vly 60 58 0.2 33 8 22 61 44 Barstow 63 59 0.2 39 9 48 64 45 Twentynine Palms 53 51 0.2 34 8 19 47 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., SEP. 14, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 67 Ozone Banning Pass Area AQI: 87 Ozone Big Bear Lake AQI: 74 Ozone Central Mojave Desert AQI: 61 Ozone Coachella Valley/Low Desert AQI: 71 Ozone Coastal Area AQI: 55 PM2.5 Hemet/Elsinore Area AQI: 84 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 64 Ozone Riverside Valley AQI: 87 Ozone San Fernando/Santa Clarita Valleys AQI: 100 Ozone San Gabriel Mountains AQI: 80 Ozone San Gabriel Valley AQI: 100 Ozone Temecula/Anza Area AQI: 54 PM10 Victor Valley AQI: 90 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 108 Ozone San Bernardino Valley AQI: 112 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Sunny skies with patchy morning clouds and fog. Increasing temperatures expected. Inversion Base: 2237 FT | Breaking Temperature: 81 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2901 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 32, 34, 35, 36 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 SUNDAY, SEPTEMBER 14, 2025 IN THE SOUTH COAST AIR BASIN.