SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., OCT. 10, 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 56 47 0.8 29 12 32 56 2 NW Coastal LA 51 43 0.4 26 11 17 55 3 SW Coastal LA 44 39 0.1 27 9 11 50 4 S Coastal LA 46 43 0.3 25 9 28 50 5 Southeast LA Co 53 45 0.6 29 12 28 56 6 W San Fernando Vly 58 49 0.3 24 8 25 45 7 E San Fernando Vly 66 54 0.6 30 9 28 50 8 W San Gabriel Vly 65 53 0.4 35 9 26 50 9 E San Gabriel Vly 72 61 0.7 45 10 32 71 10 Pomona Walnut Vly 71 59 0.4 45 13 35 64 11 S San Gabriel Vly 58 47 0.5 37 12 26 56 12 S Central LA Co 50 45 0.4 27 11 16 55 13 Santa Clarita Vly 65 57 0.4 26 9 21 58 15 San Gabriel Mts 60 53 0.4 45 7 28 49 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 60 55 0.3 26 9 28 51 Orange County: South Coast Air Basin 16 N Orange Co 57 47 0.3 33 11 18 55 17 Central Orange Co 47 39 0.7 18 10 27 53 18 N Coastal Orange Co 47 41 0.4 20 8 27 44 19 Saddleback Vly 51 47 0.4 33 11 27 55 20 Central Coastal 47 43 0.4 21 9 25 50 21 Capistrano Vly 49 45 0.4 24 8 24 44 Riverside County: South Coast Air Basin 22 Norco/Corona 67 58 0.5 46 11 29 61 23 Metro Riverside Co 73 64 0.6 52 13 29 80 24 Perris Vly 48 44 0.4 35 8 34 44 25 Lake Elsinore 57 51 0.4 24 6 24 47 26 Temecula Vly 43 40 0.3 22 5 22 37 27 Anza Vly 36 33 0.3 19 6 19 33 28 Hemet/San Jacinto 45 42 0.3 23 6 35 39 29 Banning 47 44 0.3 22 6 37 41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 54 46 0.2 29 17 15 66 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 43 42 0.2 17 9 14 50 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 72 61 0.6 33 12 24 71 33 SW San Bernardino Vly 71 58 0.5 46 13 34 61 34 C San Bernardino Vly 70 58 0.3 23 10 42 61 35 E San Bernardino Vly 58 53 0.5 35 7 35 49 36 W San Bernardino Mtns 70 57 0.4 35 9 31 58 37 C San Bernardino Mtns 61 55 0.3 27 5 34 51 38 Big Bear Lake 47 45 0.3 23 7 34 42 San Bernardino County: Mojave Desert Air Basin 39 Phelan 57 50 0.3 30 5 26 46 40 Hesperia 54 51 0.3 25 7 31 47 41 Trona 47 44 0.2 33 5 13 41 42 Victorville 61 55 0.3 26 8 25 51 43 Yucca Vly 54 50 0.2 22 9 21 50 44 Barstow 60 56 0.3 14 5 35 54 45 Twentynine Palms 44 42 0.2 21 9 19 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., OCT. 10, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Banning Pass Area AQI: 41 Ozone Big Bear Lake AQI: 42 Ozone Central Mojave Desert AQI: 50 PM2.5 Hemet/Elsinore Area AQI: 47 Ozone San Gabriel Mountains AQI: 49 Ozone Temecula/Anza Area AQI: 37 Ozone MODERATE in the following area(s): Antelope Valley AQI: 51 Ozone Coachella Valley/Low Desert AQI: 66 PM2.5 Coastal Area AQI: 55 PM2.5 Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 56 PM2.5 Northern Mojave Desert AQI: 54 Ozone Riverside Valley AQI: 80 Ozone San Bernardino Mountains AQI: 58 Ozone San Bernardino Valley AQI: 71 Ozone San Fernando/Santa Clarita Valleys AQI: 58 Ozone San Gabriel Valley AQI: 71 Ozone Victor Valley AQI: 51 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The remnants of Tropical Storm Priscilla will bring a chance of showers and thunderstorms to the region on Friday, especially in the mountains and deserts. Temperatures will be higher than Wednesday. Inversion Base: 1513 FT | Breaking Temperature: 83 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 1916 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 FRIDAY, OCTOBER 10, 2025 IN THE SOUTH COAST AIR BASIN.