SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: TUE., OCT. 27, 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 56 48 0.8 34 9 23 50 2 NW Coastal LA 54 47 0.4 31 9 27 50 3 SW Coastal LA 48 42 0.3 32 9 16 50 4 S Coastal LA 53 47 0.4 31 11 28 55 5 Southeast LA Co 55 47 0.7 34 10 32 53 6 W San Fernando Vly 56 50 0.7 29 10 19 53 7 E San Fernando Vly 57 50 0.7 33 10 26 53 8 W San Gabriel Vly 58 49 0.5 34 9 27 50 9 E San Gabriel Vly 59 49 0.6 37 9 21 50 10 Pomona Walnut Vly 59 49 0.6 37 11 30 55 11 S San Gabriel Vly 55 46 0.5 35 10 32 53 12 S Central LA Co 57 48 0.5 33 10 24 53 13 Santa Clarita Vly 64 55 0.4 28 11 19 55 15 San Gabriel Mts 58 50 0.5 37 9 28 50 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 53 47 0.4 21 9 31 50 Orange County: South Coast Air Basin 16 N Orange Co 54 46 0.2 36 9 24 50 17 Central Orange Co 50 43 0.4 30 8 19 44 18 N Coastal Orange Co 48 45 0.4 29 6 25 42 19 Saddleback Vly 51 46 0.3 36 4 20 43 20 Central Coastal 48 45 0.3 28 4 19 42 21 Capistrano Vly 48 44 0.4 28 4 17 41 Riverside County: South Coast Air Basin 22 Norco/Corona 57 50 0.6 44 12 23 56 23 Metro Riverside Co 59 52 0.8 48 15 29 62 24 Perris Vly 50 46 0.7 38 7 31 43 25 Lake Elsinore 52 48 0.4 28 6 17 44 26 Temecula Vly 47 44 0.4 28 4 18 41 27 Anza Vly 49 47 0.3 28 4 20 44 28 Hemet/San Jacinto 51 47 0.5 33 5 30 44 29 Banning 54 50 0.5 29 6 26 46 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 54 0.2 39 7 25 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 49 47 0.2 28 4 16 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 57 49 0.7 25 10 23 53 33 SW San Bernardino Vly 58 48 0.6 43 14 32 60 34 C San Bernardino Vly 53 48 0.6 39 10 39 53 35 E San Bernardino Vly 54 50 0.7 39 7 33 46 36 W San Bernardino Mtns 56 51 0.6 28 8 31 47 37 C San Bernardino Mtns 60 56 0.6 36 6 35 54 38 Big Bear Lake 52 50 0.6 33 5 32 46 San Bernardino County: Mojave Desert Air Basin 39 Phelan 58 55 0.5 26 5 30 51 40 Hesperia 51 47 0.6 22 8 33 44 41 Trona 50 45 0.3 21 6 7 42 42 Victorville 52 49 0.5 23 9 30 50 43 Yucca Vly 53 51 0.3 29 5 28 47 44 Barstow 56 47 0.4 22 9 44 50 45 Twentynine Palms 54 52 0.3 29 6 25 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON TUE., OCT. 27, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 50 PM2.5 Banning Pass Area AQI: 46 Ozone Big Bear Lake AQI: 46 Ozone Central Mojave Desert AQI: 48 Ozone Coachella Valley/Low Desert AQI: 50 Ozone Hemet/Elsinore Area AQI: 44 Ozone Inland Orange County AQI: 44 PM2.5 Northern Mojave Desert AQI: 50 PM2.5 San Gabriel Mountains AQI: 50 PM2.5 Temecula/Anza Area AQI: 44 Ozone MODERATE in the following area(s): Coastal Area AQI: 55 PM2.5 Metropolitan Area AQI: 53 PM2.5 Riverside Valley AQI: 62 PM2.5 San Bernardino Mountains AQI: 54 Ozone San Bernardino Valley AQI: 60 PM2.5 San Fernando/Santa Clarita Valleys AQI: 55 PM2.5 San Gabriel Valley AQI: 55 PM2.5 Victor Valley AQI: 51 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ A gradual cooling trend will commence on Tuesday as a Pacific low pressure system approaches SoCal. Temperatures will be within a degree or two of Monday, and light to moderate onshore winds can be expected along with mostly sunny skies. Inversion Base: 1611 FT | Breaking Temperature: 71 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2685 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 TUESDAY, OCTOBER 27, 2026 IN THE SOUTH COAST AIR BASIN.