SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., APR. 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 64 58 0.3 29 12 27 61 2 NW Coastal LA 63 54 0.5 28 9 22 50 3 SW Coastal LA 59 51 0.4 29 9 26 50 4 S Coastal LA 61 55 0.3 33 8 22 51 5 Southeast LA Co 60 55 0.6 35 11 24 55 6 W San Fernando Vly 65 59 0.5 28 8 22 64 7 E San Fernando Vly 67 61 0.5 30 10 24 71 8 W San Gabriel Vly 66 61 0.4 33 12 20 71 9 E San Gabriel Vly 69 64 0.5 38 10 22 80 10 Pomona Walnut Vly 68 61 0.6 40 11 29 71 11 S San Gabriel Vly 63 58 0.6 36 11 23 61 12 S Central LA Co 60 54 0.5 31 10 21 53 13 Santa Clarita Vly 69 64 0.3 29 8 15 80 15 San Gabriel Mts 66 62 0.5 38 10 21 74 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 68 66 0.4 32 11 20 87 Orange County: South Coast Air Basin 16 N Orange Co 63 59 0.3 43 11 17 64 17 Central Orange Co 57 53 0.4 35 11 20 55 18 N Coastal Orange Co 61 56 0.3 33 6 21 54 19 Saddleback Vly 64 59 0.2 43 7 21 64 20 Central Coastal 63 58 0.3 32 6 16 61 21 Capistrano Vly 61 57 0.3 30 7 14 58 Riverside County: South Coast Air Basin 22 Norco/Corona 69 65 0.5 52 13 25 84 23 Metro Riverside Co 75 71 0.5 59 14 27 101 24 Perris Vly 63 60 0.5 40 11 23 67 25 Lake Elsinore 62 58 0.3 29 9 11 61 26 Temecula Vly 54 51 0.3 32 7 12 47 27 Anza Vly 62 60 0.3 34 6 14 67 28 Hemet/San Jacinto 62 60 0.5 35 8 21 67 29 Banning 69 65 0.4 32 6 18 84 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 69 64 0.2 38 7 15 80 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 60 57 0.2 32 6 15 58 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 73 68 0.5 25 12 21 93 33 SW San Bernardino Vly 70 64 0.5 52 13 27 80 34 C San Bernardino Vly 76 71 0.6 39 11 26 101 35 E San Bernardino Vly 73 70 0.5 41 10 25 100 36 W San Bernardino Mtns 72 67 0.5 31 9 28 90 37 C San Bernardino Mtns 78 71 0.6 38 6 31 101 38 Big Bear Lake 66 64 0.5 37 6 31 80 San Bernardino County: Mojave Desert Air Basin 39 Phelan 69 66 0.5 33 6 35 87 40 Hesperia 70 65 0.5 30 7 37 84 41 Trona 65 58 0.3 28 6 18 61 42 Victorville 75 70 0.5 38 9 38 100 43 Yucca Vly 71 66 0.3 37 6 26 87 44 Barstow 74 68 0.4 50 6 54 93 45 Twentynine Palms 57 55 0.3 36 6 24 51 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., APR. 19, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 87 Ozone Banning Pass Area AQI: 84 Ozone Big Bear Lake AQI: 80 Ozone Central Mojave Desert AQI: 87 Ozone Coachella Valley/Low Desert AQI: 80 Ozone Coastal Area AQI: 61 Ozone Hemet/Elsinore Area AQI: 67 Ozone Inland Orange County AQI: 64 Ozone Metropolitan Area AQI: 64 Ozone Northern Mojave Desert AQI: 93 Ozone San Fernando/Santa Clarita Valleys AQI: 80 Ozone San Gabriel Mountains AQI: 74 Ozone San Gabriel Valley AQI: 80 Ozone Temecula/Anza Area AQI: 67 Ozone Victor Valley AQI: 100 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Riverside Valley AQI: 101 Ozone San Bernardino Mountains AQI: 101 Ozone San Bernardino Valley AQI: 101 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Cloudy skies becoming mostly sunny with cooler temperatures are expected. Inversion Base: 1521 FT | Breaking Temperature: 70 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2464 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 23, 34, 37 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 SUNDAY, APRIL 19, 2026 IN THE SOUTH COAST AIR BASIN.