SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., OCT. 18, 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 63 55 0.6 34 9 45 51 2 NW Coastal LA 56 52 0.7 31 9 42 50 3 SW Coastal LA 54 48 0.9 33 9 42 50 4 S Coastal LA 58 49 1.4 31 7 44 45 5 Southeast LA Co 63 53 1.8 33 8 43 49 6 W San Fernando Vly 55 52 0.9 28 7 34 48 7 E San Fernando Vly 64 58 0.8 33 8 39 61 8 W San Gabriel Vly 69 61 0.5 32 7 37 71 9 E San Gabriel Vly 66 59 0.5 17 3 37 64 10 Pomona Walnut Vly 64 54 0.9 34 6 41 50 11 S San Gabriel Vly 64 55 1.0 33 7 42 51 12 S Central LA Co 59 49 1.8 33 9 42 50 13 Santa Clarita Vly 56 50 0.4 28 6 31 46 15 San Gabriel Mts 58 53 0.6 31 5 33 49 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 52 48 0.5 22 9 34 50 Orange County: South Coast Air Basin 16 N Orange Co 63 55 0.7 38 7 47 51 17 Central Orange Co 56 50 0.8 30 8 47 46 18 N Coastal Orange Co 55 49 1.2 29 4 41 45 19 Saddleback Vly 57 53 0.5 38 5 39 49 20 Central Coastal 56 51 0.7 26 5 32 47 21 Capistrano Vly 54 50 0.5 34 7 24 46 Riverside County: South Coast Air Basin 22 Norco/Corona 60 55 0.8 50 7 38 51 23 Metro Riverside Co 61 56 0.8 56 9 39 54 24 Perris Vly 48 46 0.8 36 4 34 43 25 Lake Elsinore 51 49 0.4 21 6 26 45 26 Temecula Vly 47 44 0.3 51 5 19 47 27 Anza Vly 46 44 0.2 62 2 18 54 28 Hemet/San Jacinto 47 45 0.7 40 3 32 42 29 Banning 50 47 0.6 31 2 32 44 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 53 50 0.1 83 3 25 65 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 47 45 0.1 40 2 14 42 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 66 59 0.6 32 8 36 64 33 SW San Bernardino Vly 63 55 0.8 50 8 41 51 34 C San Bernardino Vly 59 53 0.9 38 7 39 49 35 E San Bernardino Vly 53 49 0.8 37 4 36 45 36 W San Bernardino Mtns 59 54 0.8 31 5 33 50 37 C San Bernardino Mtns 49 46 0.9 36 5 35 43 38 Big Bear Lake 51 49 0.8 33 4 33 45 San Bernardino County: Mojave Desert Air Basin 39 Phelan 52 50 0.7 25 4 36 46 40 Hesperia 42 41 0.7 25 5 37 38 41 Trona 43 41 0.2 17 4 15 38 42 Victorville 48 46 0.6 25 7 40 43 43 Yucca Vly 48 47 0.3 30 3 26 44 44 Barstow 48 45 0.5 24 4 47 44 45 Twentynine Palms 48 46 0.2 32 2 23 43 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., OCT. 18, 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: 44 Ozone Big Bear Lake AQI: 45 Ozone Central Mojave Desert AQI: 44 Ozone Coastal Area AQI: 50 PM2.5 Hemet/Elsinore Area AQI: 45 Ozone Inland Orange County AQI: 49 Ozone Northern Mojave Desert AQI: 44 NO2 San Bernardino Mountains AQI: 50 Ozone San Gabriel Mountains AQI: 49 Ozone Victor Valley AQI: 46 Ozone MODERATE in the following area(s): Coachella Valley/Low Desert AQI: 65 PM10 Metropolitan Area AQI: 51 Ozone Riverside Valley AQI: 54 Ozone San Bernardino Valley AQI: 64 Ozone San Fernando/Santa Clarita Valleys AQI: 61 Ozone San Gabriel Valley AQI: 71 Ozone Temecula/Anza Area AQI: 54 PM10 ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies and cooler temperatures are expected. Inversion Base: 486 FT | Breaking Temperature: 76 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 4182 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 SUNDAY, OCTOBER 18, 2026 IN THE SOUTH COAST AIR BASIN.