SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., APR. 04, 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 49 0.9 25 8 47 45 2 NW Coastal LA 53 45 0.6 24 9 34 50 3 SW Coastal LA 46 42 0.8 27 9 41 50 4 S Coastal LA 51 48 1.1 38 8 50 47 5 Southeast LA Co 58 51 1.4 39 8 45 47 6 W San Fernando Vly 55 51 0.6 21 6 32 47 7 E San Fernando Vly 60 55 0.7 24 7 41 51 8 W San Gabriel Vly 63 55 0.5 27 5 38 51 9 E San Gabriel Vly 64 58 0.4 20 2 23 61 10 Pomona Walnut Vly 62 55 0.6 36 7 41 51 11 S San Gabriel Vly 63 53 0.7 37 7 42 49 12 S Central LA Co 54 48 1.4 31 8 40 44 13 Santa Clarita Vly 57 54 0.4 20 6 21 50 15 San Gabriel Mts 57 53 0.5 24 4 35 49 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 56 52 0.4 17 8 32 48 Orange County: South Coast Air Basin 16 N Orange Co 60 54 0.6 43 9 35 50 17 Central Orange Co 47 45 0.7 43 9 45 50 18 N Coastal Orange Co 48 45 1.0 37 8 46 44 19 Saddleback Vly 57 54 0.4 37 5 38 50 20 Central Coastal 54 52 0.5 33 7 34 48 21 Capistrano Vly 56 54 0.3 27 7 26 50 Riverside County: South Coast Air Basin 22 Norco/Corona 59 56 0.6 34 8 36 54 23 Metro Riverside Co 59 56 0.6 30 10 40 54 24 Perris Vly 50 49 0.6 25 5 36 45 25 Lake Elsinore 55 52 0.3 24 4 22 48 26 Temecula Vly 49 47 0.2 24 5 20 44 27 Anza Vly 51 49 0.2 26 4 19 45 28 Hemet/San Jacinto 52 50 0.5 24 3 34 46 29 Banning 53 52 0.5 22 2 35 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 55 53 0.2 35 9 18 50 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 47 45 0.2 23 5 15 42 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 58 52 0.5 27 7 32 48 33 SW San Bernardino Vly 59 54 0.6 36 9 40 50 34 C San Bernardino Vly 59 55 0.6 23 6 38 51 35 E San Bernardino Vly 58 54 0.6 24 4 38 50 36 W San Bernardino Mtns 55 52 0.5 24 5 33 48 37 C San Bernardino Mtns 52 49 0.6 23 4 33 45 38 Big Bear Lake 53 52 0.6 26 7 34 48 San Bernardino County: Mojave Desert Air Basin 39 Phelan 55 53 0.5 20 5 28 49 40 Hesperia 51 50 0.5 20 6 33 46 41 Trona 54 50 0.3 11 4 10 46 42 Victorville 52 51 0.5 22 7 28 47 43 Yucca Vly 50 49 0.3 28 5 26 45 44 Barstow 55 52 0.4 27 5 48 48 45 Twentynine Palms 49 48 0.3 27 5 23 44 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., APR. 04, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 48 Ozone Banning Pass Area AQI: 48 Ozone Big Bear Lake AQI: 48 Ozone Central Mojave Desert AQI: 45 Ozone Coachella Valley/Low Desert AQI: 50 PM2.5 Coastal Area AQI: 50 PM2.5 Hemet/Elsinore Area AQI: 48 Ozone Inland Orange County AQI: 50 PM2.5 Metropolitan Area AQI: 50 PM2.5 Northern Mojave Desert AQI: 48 Ozone San Bernardino Mountains AQI: 48 Ozone San Gabriel Mountains AQI: 49 Ozone Temecula/Anza Area AQI: 45 Ozone Victor Valley AQI: 49 Ozone MODERATE in the following area(s): Riverside Valley AQI: 54 Ozone San Bernardino Valley AQI: 51 Ozone San Fernando/Santa Clarita Valleys AQI: 51 Ozone San Gabriel Valley AQI: 61 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy to mostly sunny skies are expected on Saturday. Temperatures will be generally warmer than Friday as offshore flow continues. Inversion Base: 486 FT | Breaking Temperature: 71 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 3069 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 SATURDAY, APRIL 04, 2026 IN THE SOUTH COAST AIR BASIN.