SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., JUL. 18, 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 52 45 0.4 29 13 21 58 2 NW Coastal LA 41 35 0.3 29 10 9 53 3 SW Coastal LA 37 33 0.2 31 11 14 55 4 S Coastal LA 35 32 0.3 38 10 17 53 5 Southeast LA Co 42 39 0.4 39 11 23 55 6 W San Fernando Vly 55 51 0.3 27 10 13 53 7 E San Fernando Vly 58 52 0.4 30 12 18 56 8 W San Gabriel Vly 64 57 0.3 34 13 15 58 9 E San Gabriel Vly 65 59 0.4 39 10 21 64 10 Pomona Walnut Vly 68 59 0.4 43 11 24 64 11 S San Gabriel Vly 50 46 0.4 40 11 23 55 12 S Central LA Co 36 34 0.4 34 11 14 55 13 Santa Clarita Vly 65 58 0.2 27 11 18 61 15 San Gabriel Mts 62 58 0.4 39 12 21 61 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 63 58 0.3 25 11 17 61 Orange County: South Coast Air Basin 16 N Orange Co 44 40 0.2 43 11 11 55 17 Central Orange Co 40 36 0.3 41 11 10 55 18 N Coastal Orange Co 40 37 0.3 37 8 16 44 19 Saddleback Vly 47 43 0.2 42 7 14 40 20 Central Coastal 45 41 0.2 34 8 14 44 21 Capistrano Vly 43 40 0.3 28 8 15 44 Riverside County: South Coast Air Basin 22 Norco/Corona 60 54 0.3 48 11 16 55 23 Metro Riverside Co 67 60 0.4 51 11 17 67 24 Perris Vly 62 58 0.4 47 11 23 61 25 Lake Elsinore 52 47 0.3 24 11 15 55 26 Temecula Vly 43 41 0.3 29 8 14 44 27 Anza Vly 51 46 0.2 32 7 12 43 28 Hemet/San Jacinto 54 51 0.3 43 8 23 47 29 Banning 64 60 0.3 40 8 21 67 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 67 61 0.2 35 10 9 71 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 44 39 0.2 30 7 10 39 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 65 60 0.3 41 12 21 67 33 SW San Bernardino Vly 62 55 0.3 48 11 24 55 34 C San Bernardino Vly 73 66 0.3 53 11 28 87 35 E San Bernardino Vly 73 66 0.4 50 10 25 87 36 W San Bernardino Mtns 67 63 0.3 41 11 26 77 37 C San Bernardino Mtns 80 72 0.3 50 8 27 105 38 Big Bear Lake 66 63 0.3 45 7 25 77 San Bernardino County: Mojave Desert Air Basin 39 Phelan 64 62 0.3 34 8 26 74 40 Hesperia 66 61 0.3 34 9 28 71 41 Trona 60 54 0.2 43 8 20 50 42 Victorville 69 64 0.3 34 9 27 80 43 Yucca Vly 68 62 0.2 32 9 17 74 44 Barstow 66 61 0.3 32 9 34 71 45 Twentynine Palms 56 52 0.2 32 7 16 48 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., JUL. 18, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Temecula/Anza Area AQI: 44 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 61 Ozone Banning Pass Area AQI: 67 Ozone Big Bear Lake AQI: 77 Ozone Central Mojave Desert AQI: 74 Ozone Coachella Valley/Low Desert AQI: 71 Ozone Coastal Area AQI: 55 PM2.5 Hemet/Elsinore Area AQI: 61 Ozone Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 58 PM2.5 Northern Mojave Desert AQI: 71 Ozone Riverside Valley AQI: 67 Ozone San Bernardino Valley AQI: 87 Ozone San Fernando/Santa Clarita Valleys AQI: 61 Ozone San Gabriel Mountains AQI: 61 Ozone San Gabriel Valley AQI: 64 Ozone Victor Valley AQI: 80 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Mostly sunny skies are expected in most of the areas. Patchy morning clouds and fog are expected along the coast and in the valleys. Inversion Base: 1605 FT | Breaking Temperature: 82 DEG F Inversion Breaking: YES | Maximum Mixing HEIGHT: 2346 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 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 SATURDAY, JULY 18, 2026 IN THE SOUTH COAST AIR BASIN.