SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: MON., OCT. 19, 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 52 46 0.9 35 13 36 58 2 NW Coastal LA 51 48 0.6 32 10 29 53 3 SW Coastal LA 45 43 0.4 32 9 28 50 4 S Coastal LA 43 41 0.4 30 8 27 44 5 Southeast LA Co 50 45 0.8 32 11 33 55 6 W San Fernando Vly 55 52 0.6 30 10 29 53 7 E San Fernando Vly 58 52 0.7 34 10 32 53 8 W San Gabriel Vly 61 52 0.5 34 10 30 53 9 E San Gabriel Vly 69 58 0.7 28 9 33 61 10 Pomona Walnut Vly 68 57 0.7 37 11 36 58 11 S San Gabriel Vly 55 48 0.6 32 11 33 55 12 S Central LA Co 47 43 0.8 32 11 24 55 13 Santa Clarita Vly 68 62 0.4 32 8 22 74 15 San Gabriel Mts 66 58 0.6 34 8 33 61 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 64 57 0.4 32 9 28 58 Orange County: South Coast Air Basin 16 N Orange Co 56 50 0.4 41 10 22 53 17 Central Orange Co 48 44 0.5 20 10 29 53 18 N Coastal Orange Co 46 44 0.4 25 4 27 41 19 Saddleback Vly 58 55 0.3 41 5 30 51 20 Central Coastal 52 49 0.3 28 4 27 45 21 Capistrano Vly 53 50 0.4 31 4 28 46 Riverside County: South Coast Air Basin 22 Norco/Corona 71 62 0.6 59 11 33 74 23 Metro Riverside Co 78 65 0.7 69 12 40 84 24 Perris Vly 62 58 0.7 43 8 39 61 25 Lake Elsinore 58 56 0.4 32 7 28 54 26 Temecula Vly 54 51 0.4 31 5 25 47 27 Anza Vly 58 55 0.3 31 4 22 51 28 Hemet/San Jacinto 59 56 0.6 35 5 38 54 29 Banning 61 56 0.5 32 5 35 54 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 58 53 0.2 36 4 20 49 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 46 43 0.2 27 4 16 40 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 72 60 0.6 32 11 33 67 33 SW San Bernardino Vly 70 58 0.7 59 12 38 61 34 C San Bernardino Vly 72 63 0.7 39 9 43 77 35 E San Bernardino Vly 70 62 0.7 43 8 40 74 36 W San Bernardino Mtns 72 62 0.6 34 8 39 74 37 C San Bernardino Mtns 70 63 0.7 37 6 41 77 38 Big Bear Lake 62 59 0.6 35 5 39 64 San Bernardino County: Mojave Desert Air Basin 39 Phelan 69 63 0.5 30 5 39 77 40 Hesperia 64 59 0.6 29 7 41 64 41 Trona 49 45 0.3 19 5 11 42 42 Victorville 64 59 0.5 30 8 41 64 43 Yucca Vly 57 52 0.3 30 4 26 48 44 Barstow 53 48 0.4 28 4 44 44 45 Twentynine Palms 48 46 0.2 30 4 24 43 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON MON., OCT. 19, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Central Mojave Desert AQI: 48 Ozone Coachella Valley/Low Desert AQI: 49 Ozone Northern Mojave Desert AQI: 44 Ozone MODERATE in the following area(s): Antelope Valley AQI: 58 Ozone Banning Pass Area AQI: 54 Ozone Big Bear Lake AQI: 64 Ozone Coastal Area AQI: 53 PM2.5 Hemet/Elsinore Area AQI: 61 Ozone Inland Orange County AQI: 53 PM2.5 Metropolitan Area AQI: 58 PM2.5 Riverside Valley AQI: 84 Ozone San Bernardino Mountains AQI: 77 Ozone San Bernardino Valley AQI: 77 Ozone San Fernando/Santa Clarita Valleys AQI: 74 Ozone San Gabriel Mountains AQI: 61 Ozone San Gabriel Valley AQI: 61 Ozone Temecula/Anza Area AQI: 51 Ozone Victor Valley AQI: 77 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies and cooler temperatures are expected. Inversion Base: 486 FT | Breaking Temperature: 72 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1854 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 19, 2026 IN THE SOUTH COAST AIR BASIN.