SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., OCT. 20, 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 45 14 45 60 2 NW Coastal LA 59 49 0.9 40 12 37 56 3 SW Coastal LA 53 43 0.7 42 7 38 40 4 S Coastal LA 53 47 0.8 40 7 41 44 5 Southeast LA Co 58 51 1.3 43 11 42 55 6 W San Fernando Vly 68 60 0.7 36 11 28 67 7 E San Fernando Vly 67 59 0.8 44 14 40 64 8 W San Gabriel Vly 71 61 0.6 43 14 38 71 9 E San Gabriel Vly 75 62 0.7 37 10 38 74 10 Pomona Walnut Vly 73 60 0.8 42 14 46 67 11 S San Gabriel Vly 63 54 0.9 43 14 40 60 12 S Central LA Co 58 51 1.3 42 9 37 50 13 Santa Clarita Vly 77 67 0.4 35 10 25 90 15 San Gabriel Mts 71 62 0.6 41 9 37 74 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 57 52 0.5 27 10 31 53 Orange County: South Coast Air Basin 16 N Orange Co 63 53 0.5 46 13 36 58 17 Central Orange Co 56 48 0.8 32 11 34 55 18 N Coastal Orange Co 54 49 0.7 34 4 38 45 19 Saddleback Vly 68 59 0.3 46 7 35 64 20 Central Coastal 61 54 0.5 31 5 30 50 21 Capistrano Vly 62 55 0.5 31 4 26 51 Riverside County: South Coast Air Basin 22 Norco/Corona 72 63 0.7 63 14 39 77 23 Metro Riverside Co 77 67 0.8 71 15 45 90 24 Perris Vly 63 58 0.7 48 13 42 61 25 Lake Elsinore 68 62 0.5 31 8 25 74 26 Temecula Vly 58 53 0.4 33 4 23 49 27 Anza Vly 54 50 0.3 37 5 21 46 28 Hemet/San Jacinto 61 55 0.6 33 7 40 51 29 Banning 58 54 0.5 29 5 37 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 62 58 0.2 50 17 20 66 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 48 45 0.2 34 6 16 42 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 69 57 0.7 29 11 39 58 33 SW San Bernardino Vly 71 59 0.8 61 15 43 64 34 C San Bernardino Vly 68 59 0.7 36 11 42 64 35 E San Bernardino Vly 65 60 0.7 51 7 44 67 36 W San Bernardino Mtns 65 57 0.6 33 7 39 58 37 C San Bernardino Mtns 59 54 0.7 35 6 42 50 38 Big Bear Lake 60 57 0.6 32 7 41 58 San Bernardino County: Mojave Desert Air Basin 39 Phelan 62 59 0.6 31 4 37 64 40 Hesperia 54 50 0.6 30 6 41 46 41 Trona 48 46 0.3 20 5 9 43 42 Victorville 57 54 0.6 30 8 38 50 43 Yucca Vly 61 60 0.3 35 9 28 67 44 Barstow 57 51 0.4 27 8 49 47 45 Twentynine Palms 51 49 0.3 35 10 25 53 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., OCT. 20, 2025, 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 Northern Mojave Desert AQI: 47 Ozone Temecula/Anza Area AQI: 49 Ozone MODERATE in the following area(s): Antelope Valley AQI: 53 PM2.5 Big Bear Lake AQI: 58 Ozone Central Mojave Desert AQI: 67 Ozone Coachella Valley/Low Desert AQI: 66 PM2.5 Coastal Area AQI: 56 PM2.5 Hemet/Elsinore Area AQI: 74 Ozone Inland Orange County AQI: 64 Ozone Metropolitan Area AQI: 60 PM2.5 Riverside Valley AQI: 90 Ozone San Bernardino Mountains AQI: 58 Ozone San Bernardino Valley AQI: 67 Ozone San Fernando/Santa Clarita Valleys AQI: 90 Ozone San Gabriel Mountains AQI: 74 Ozone San Gabriel Valley AQI: 74 Ozone Victor Valley AQI: 64 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The temperature on Monday will be near to slightly above seasonal average. Winds will be light. Inversion Base: 486 FT | Breaking Temperature: 71 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1961 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-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, OCTOBER 20, 2025 IN THE SOUTH COAST AIR BASIN.