SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., JUL. 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 55 46 0.9 30 13 22 58 2 NW Coastal LA 43 38 0.3 29 11 12 55 3 SW Coastal LA 37 32 0.1 29 11 15 55 4 S Coastal LA 34 32 0.2 28 10 22 53 5 Southeast LA Co 43 38 0.6 31 12 21 56 6 W San Fernando Vly 61 54 0.3 28 11 18 55 7 E San Fernando Vly 61 55 0.6 31 12 21 56 8 W San Gabriel Vly 60 51 0.5 36 12 17 56 9 E San Gabriel Vly 68 57 0.5 44 10 26 58 10 Pomona Walnut Vly 73 61 0.6 44 12 31 71 11 S San Gabriel Vly 49 42 0.3 38 12 20 56 12 S Central LA Co 39 35 0.2 29 11 16 55 13 Santa Clarita Vly 73 64 0.3 29 12 22 80 15 San Gabriel Mts 67 58 0.4 44 12 25 61 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 67 58 0.3 29 10 27 61 Orange County: South Coast Air Basin 16 N Orange Co 48 41 0.1 33 12 12 56 17 Central Orange Co 42 38 0.4 23 12 13 56 18 N Coastal Orange Co 39 36 0.3 25 9 20 50 19 Saddleback Vly 49 44 0.2 32 8 19 44 20 Central Coastal 45 41 0.3 25 8 18 44 21 Capistrano Vly 44 40 0.3 28 7 20 39 Riverside County: South Coast Air Basin 22 Norco/Corona 68 57 0.4 40 12 20 58 23 Metro Riverside Co 78 65 0.6 44 13 19 84 24 Perris Vly 70 60 0.5 43 10 26 67 25 Lake Elsinore 51 48 0.4 25 9 20 50 26 Temecula Vly 47 45 0.3 34 10 18 53 27 Anza Vly 58 54 0.2 37 7 15 50 28 Hemet/San Jacinto 62 56 0.4 41 8 26 54 29 Banning 69 59 0.3 38 7 23 64 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 64 58 0.2 43 7 11 61 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 43 40 0.2 32 6 13 37 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 74 62 0.5 35 13 24 74 33 SW San Bernardino Vly 71 59 0.5 41 13 30 64 34 C San Bernardino Vly 82 69 0.4 48 11 36 97 35 E San Bernardino Vly 83 72 0.5 45 10 28 105 36 W San Bernardino Mtns 75 63 0.4 37 10 30 77 37 C San Bernardino Mtns 86 73 0.4 45 6 31 108 38 Big Bear Lake 78 70 0.4 42 8 28 100 San Bernardino County: Mojave Desert Air Basin 39 Phelan 64 58 0.4 34 6 30 61 40 Hesperia 69 61 0.4 32 8 32 71 41 Trona 58 54 0.2 37 7 14 50 42 Victorville 72 64 0.3 32 9 32 80 43 Yucca Vly 70 62 0.2 32 7 19 74 44 Barstow 69 56 0.3 27 8 37 54 45 Twentynine Palms 56 53 0.2 31 6 18 49 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., JUL. 17, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 61 Ozone Banning Pass Area AQI: 64 Ozone Big Bear Lake AQI: 100 Ozone Central Mojave Desert AQI: 74 Ozone Coachella Valley/Low Desert AQI: 61 Ozone Coastal Area AQI: 55 PM2.5 Hemet/Elsinore Area AQI: 67 Ozone Inland Orange County AQI: 56 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 54 Ozone Riverside Valley AQI: 84 Ozone San Fernando/Santa Clarita Valleys AQI: 80 Ozone San Gabriel Mountains AQI: 61 Ozone San Gabriel Valley AQI: 71 Ozone Temecula/Anza Area AQI: 53 PM2.5 Victor Valley AQI: 80 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 108 Ozone San Bernardino Valley AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Partly cloudy skies with cooler temperatures are expected. Patchy fog along the coast is expected. Inversion Base: 1511 FT | Breaking Temperature: 85 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1922 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 35, 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 FRIDAY, JULY 17, 2026 IN THE SOUTH COAST AIR BASIN.