SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: TUE., AUG. 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 66 56 0.5 28 14 24 60 2 NW Coastal LA 52 45 0.3 28 12 14 56 3 SW Coastal LA 45 38 0.1 31 11 18 55 4 S Coastal LA 53 47 0.2 38 10 22 53 5 Southeast LA Co 61 52 0.4 38 12 22 56 6 W San Fernando Vly 81 67 0.4 27 11 16 90 7 E San Fernando Vly 77 66 0.4 29 14 22 87 8 W San Gabriel Vly 75 67 0.3 32 14 18 90 9 E San Gabriel Vly 103 84 0.4 36 14 23 147 10 Pomona Walnut Vly 89 71 0.4 43 14 28 101 11 S San Gabriel Vly 72 60 0.4 39 13 21 67 12 S Central LA Co 58 48 0.2 33 11 17 55 13 Santa Clarita Vly 97 77 0.4 27 12 24 122 15 San Gabriel Mts 86 74 0.4 37 12 25 112 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 70 65 0.3 25 12 26 84 Orange County: South Coast Air Basin 16 N Orange Co 66 57 0.2 44 12 10 58 17 Central Orange Co 54 47 0.3 41 11 9 55 18 N Coastal Orange Co 47 42 0.2 38 7 19 39 19 Saddleback Vly 57 50 0.2 44 6 19 46 20 Central Coastal 51 45 0.3 37 6 18 42 21 Capistrano Vly 52 46 0.3 35 7 20 43 Riverside County: South Coast Air Basin 22 Norco/Corona 79 69 0.4 50 13 20 97 23 Metro Riverside Co 91 81 0.4 54 15 18 136 24 Perris Vly 86 78 0.4 42 13 24 126 25 Lake Elsinore 82 70 0.3 33 13 21 100 26 Temecula Vly 61 55 0.3 40 10 19 53 27 Anza Vly 69 62 0.2 45 7 16 74 28 Hemet/San Jacinto 85 75 0.3 38 10 25 115 29 Banning 101 84 0.3 35 9 24 147 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 72 65 0.2 53 9 14 84 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 50 44 0.2 38 8 13 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 93 80 0.5 38 14 28 133 33 SW San Bernardino Vly 84 71 0.4 50 14 32 101 34 C San Bernardino Vly 98 85 0.4 43 13 37 150 35 E San Bernardino Vly 101 89 0.4 42 10 25 159 36 W San Bernardino Mtns 98 85 0.4 37 12 30 150 37 C San Bernardino Mtns 104 93 0.4 41 7 28 169 38 Big Bear Lake 73 71 0.4 38 6 25 101 San Bernardino County: Mojave Desert Air Basin 39 Phelan 87 80 0.4 31 8 23 133 40 Hesperia 81 75 0.4 29 9 26 115 41 Trona 63 58 0.2 32 6 25 61 42 Victorville 81 75 0.3 30 10 21 115 43 Yucca Vly 70 65 0.2 36 7 21 84 44 Barstow 69 66 0.3 32 8 38 87 45 Twentynine Palms 59 55 0.2 36 8 19 51 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON TUE., AUG. 04, 2026, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 84 Ozone Central Mojave Desert AQI: 84 Ozone Coachella Valley/Low Desert AQI: 84 Ozone Coastal Area AQI: 56 PM2.5 Inland Orange County AQI: 55 PM2.5 Metropolitan Area AQI: 60 PM2.5 Northern Mojave Desert AQI: 87 Ozone Temecula/Anza Area AQI: 74 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Banning Pass Area AQI: 147 Ozone Big Bear Lake AQI: 101 Ozone Hemet/Elsinore Area AQI: 126 Ozone Riverside Valley AQI: 136 Ozone San Fernando/Santa Clarita Valleys AQI: 122 Ozone San Gabriel Mountains AQI: 112 Ozone San Gabriel Valley AQI: 147 Ozone Victor Valley AQI: 133 Ozone UNHEALTHY in the following area(s): San Bernardino Mountains AQI: 169 Ozone San Bernardino Valley AQI: 159 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Temperatures will remain above average but will start to decrease in most of the SCAB. Extreme heat warnings are in effect formountain areas and the Coachella Valley. A marine layer will cause coastal fog overnight and in the morning hours. Inversion Base: 1422 FT | Breaking Temperature: 92 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1798 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 TUESDAY, AUGUST 04, 2026 IN THE SOUTH COAST AIR BASIN.