SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., OCT. 17, 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 61 54 0.8 32 10 48 53 2 NW Coastal LA 53 47 0.7 31 26 33 82 3 SW Coastal LA 49 43 0.7 30 21 42 73 4 S Coastal LA 62 53 1.3 33 7 55 52 5 Southeast LA Co 60 52 2.2 34 8 50 48 6 W San Fernando Vly 54 49 1.1 24 8 33 45 7 E San Fernando Vly 64 57 0.9 31 5 41 58 8 W San Gabriel Vly 70 61 0.6 29 4 37 71 9 E San Gabriel Vly 63 54 0.4 15 2 27 50 10 Pomona Walnut Vly 58 53 0.7 31 5 42 49 11 S San Gabriel Vly 65 55 1.0 33 6 44 51 12 S Central LA Co 55 48 2.2 32 13 46 58 13 Santa Clarita Vly 49 47 0.3 23 5 18 44 15 San Gabriel Mts 54 50 0.6 28 4 34 46 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 49 46 0.3 17 9 31 50 Orange County: South Coast Air Basin 16 N Orange Co 57 52 0.7 35 6 37 48 17 Central Orange Co 51 48 0.6 35 7 44 44 18 N Coastal Orange Co 51 47 1.1 32 5 49 46 19 Saddleback Vly 52 50 0.4 32 4 38 46 20 Central Coastal 53 51 0.6 27 6 35 47 21 Capistrano Vly 55 52 0.4 21 6 27 48 Riverside County: South Coast Air Basin 22 Norco/Corona 52 48 0.6 34 7 34 44 23 Metro Riverside Co 53 48 0.8 35 8 40 44 24 Perris Vly 46 43 0.6 33 3 33 40 25 Lake Elsinore 48 45 0.3 18 3 22 42 26 Temecula Vly 46 45 0.3 20 3 22 42 27 Anza Vly 45 44 0.3 23 2 23 41 28 Hemet/San Jacinto 45 43 0.4 28 3 26 40 29 Banning 44 43 0.4 25 2 16 40 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 50 45 0.2 36 2 26 42 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 44 43 0.2 22 2 19 40 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 33 29 0.6 32 6 33 33 33 SW San Bernardino Vly 50 45 0.7 34 8 40 44 34 C San Bernardino Vly 51 45 0.6 37 5 44 42 35 E San Bernardino Vly 48 45 0.6 35 3 36 42 36 W San Bernardino Mtns 42 39 0.5 31 4 37 36 37 C San Bernardino Mtns 48 44 0.5 36 3 36 41 38 Big Bear Lake 48 47 0.5 30 4 37 44 San Bernardino County: Mojave Desert Air Basin 39 Phelan 48 47 0.4 26 5 36 44 40 Hesperia 43 42 0.4 27 5 38 39 41 Trona 44 40 0.3 18 4 11 37 42 Victorville 49 48 0.4 26 7 37 44 43 Yucca Vly 49 46 0.3 25 3 32 43 44 Barstow 50 46 0.3 20 5 56 53 45 Twentynine Palms 45 44 0.3 24 2 30 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., OCT. 17, 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: 40 Ozone Big Bear Lake AQI: 44 Ozone Central Mojave Desert AQI: 43 Ozone Coachella Valley/Low Desert AQI: 42 Ozone Hemet/Elsinore Area AQI: 42 Ozone Inland Orange County AQI: 48 Ozone Riverside Valley AQI: 44 PM2.5 San Bernardino Mountains AQI: 41 Ozone San Bernardino Valley AQI: 44 PM2.5 San Gabriel Mountains AQI: 46 Ozone Temecula/Anza Area AQI: 42 Ozone Victor Valley AQI: 44 Ozone MODERATE in the following area(s): Coastal Area AQI: 82 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 53 NO2 San Fernando/Santa Clarita Valleys AQI: 58 Ozone San Gabriel Valley AQI: 71 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies with cooler temperatures are expected. Inversion Base: 486 FT | Breaking Temperature: 81 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 4201 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 Above 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 SATURDAY, OCTOBER 17, 2026 IN THE SOUTH COAST AIR BASIN.