SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: THU., MAR. 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 73 67 0.4 34 16 35 90 2 NW Coastal LA 63 56 0.6 31 21 29 73 3 SW Coastal LA 56 51 0.4 33 14 29 60 4 S Coastal LA 64 57 0.5 35 9 31 58 5 Southeast LA Co 71 64 0.5 36 15 32 80 6 W San Fernando Vly 78 68 0.6 28 10 24 93 7 E San Fernando Vly 76 68 0.6 33 12 32 93 8 W San Gabriel Vly 81 75 0.4 33 10 30 115 9 E San Gabriel Vly 91 84 0.5 30 11 39 147 10 Pomona Walnut Vly 91 81 0.7 38 18 42 136 11 S San Gabriel Vly 78 68 0.5 35 18 31 93 12 S Central LA Co 66 60 0.3 34 13 27 67 13 Santa Clarita Vly 73 65 0.3 28 8 28 84 15 San Gabriel Mts 76 68 0.5 32 7 35 93 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 53 51 0.4 24 11 37 55 Orange County: South Coast Air Basin 16 N Orange Co 78 68 0.4 41 17 22 93 17 Central Orange Co 68 59 0.6 36 14 20 64 18 N Coastal Orange Co 56 50 0.5 34 6 28 46 19 Saddleback Vly 74 65 0.3 41 6 26 84 20 Central Coastal 63 55 0.4 31 6 24 51 21 Capistrano Vly 68 59 0.4 28 6 25 64 Riverside County: South Coast Air Basin 22 Norco/Corona 88 78 0.6 50 13 33 126 23 Metro Riverside Co 93 85 0.5 55 16 42 150 24 Perris Vly 78 73 0.6 41 11 38 108 25 Lake Elsinore 82 71 0.4 27 8 25 101 26 Temecula Vly 61 58 0.4 34 7 23 61 27 Anza Vly 64 58 0.3 39 6 20 61 28 Hemet/San Jacinto 70 66 0.5 30 8 36 87 29 Banning 69 65 0.5 27 6 35 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 65 63 0.2 48 6 16 77 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 46 43 0.2 30 6 17 40 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 86 78 0.6 26 14 36 126 33 SW San Bernardino Vly 89 78 0.6 49 18 39 126 34 C San Bernardino Vly 83 76 0.7 34 11 43 118 35 E San Bernardino Vly 88 79 0.6 44 7 39 129 36 W San Bernardino Mtns 85 77 0.6 31 7 38 122 37 C San Bernardino Mtns 78 71 0.7 34 8 37 101 38 Big Bear Lake 67 62 0.6 31 6 36 74 San Bernardino County: Mojave Desert Air Basin 39 Phelan 78 70 0.5 32 6 35 100 40 Hesperia 68 65 0.6 34 8 37 84 41 Trona 49 44 0.3 27 6 49 46 42 Victorville 67 64 0.5 35 11 35 80 43 Yucca Vly 58 56 0.4 31 6 25 54 44 Barstow 59 57 0.4 39 6 43 58 45 Twentynine Palms 58 56 0.3 31 6 23 54 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON THU., MAR. 19, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 55 PM2.5 Banning Pass Area AQI: 84 Ozone Big Bear Lake AQI: 74 Ozone Central Mojave Desert AQI: 54 Ozone Coachella Valley/Low Desert AQI: 77 Ozone Coastal Area AQI: 73 PM2.5 Inland Orange County AQI: 84 Ozone Metropolitan Area AQI: 93 Ozone Northern Mojave Desert AQI: 58 Ozone San Fernando/Santa Clarita Valleys AQI: 93 Ozone San Gabriel Mountains AQI: 93 Ozone Temecula/Anza Area AQI: 61 Ozone Victor Valley AQI: 100 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Hemet/Elsinore Area AQI: 108 Ozone Riverside Valley AQI: 150 Ozone San Bernardino Mountains AQI: 122 Ozone San Bernardino Valley AQI: 129 Ozone San Gabriel Valley AQI: 147 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ High temperatures predicted through Friday. Weak pressure gradients and light winds in the Basin. Inversion Base: 486 FT | Breaking Temperature: 81 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2407 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 THURSDAY, MARCH 19, 2026 IN THE SOUTH COAST AIR BASIN.