SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., JUL. 19, 2025 -------------------------------------------------------------------------------- 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 58 49 0.6 25 10 16 53 2 NW Coastal LA 44 39 0.3 25 9 11 50 3 SW Coastal LA 37 33 0.1 25 7 7 39 4 S Coastal LA 45 38 0.2 24 8 15 44 5 Southeast LA Co 54 45 0.4 25 9 16 50 6 W San Fernando Vly 65 58 0.4 26 9 10 61 7 E San Fernando Vly 63 55 0.4 27 12 14 56 8 W San Gabriel Vly 69 55 0.3 29 12 12 56 9 E San Gabriel Vly 83 69 0.3 31 11 14 97 10 Pomona Walnut Vly 75 66 0.3 38 11 14 87 11 S San Gabriel Vly 62 52 0.3 28 10 16 53 12 S Central LA Co 53 44 0.2 24 8 11 44 13 Santa Clarita Vly 84 69 0.2 29 13 15 97 15 San Gabriel Mts 77 65 0.3 38 12 18 84 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 79 68 0.3 35 12 19 93 Orange County: South Coast Air Basin 16 N Orange Co 54 47 0.1 33 9 12 50 17 Central Orange Co 46 41 0.3 22 9 9 50 18 N Coastal Orange Co 44 39 0.2 23 7 13 39 19 Saddleback Vly 53 47 0.2 33 8 10 44 20 Central Coastal 47 42 0.2 23 7 9 39 21 Capistrano Vly 46 42 0.2 25 7 8 39 Riverside County: South Coast Air Basin 22 Norco/Corona 65 58 0.3 44 11 10 61 23 Metro Riverside Co 79 67 0.5 48 12 9 90 24 Perris Vly 71 65 0.4 36 10 19 84 25 Lake Elsinore 58 55 0.2 23 8 7 51 26 Temecula Vly 49 45 0.2 28 7 8 42 27 Anza Vly 57 51 0.2 34 9 9 50 28 Hemet/San Jacinto 63 57 0.3 35 9 22 58 29 Banning 74 62 0.3 37 9 21 74 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 62 0.2 59 10 10 74 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 54 49 0.1 34 8 10 45 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 77 69 0.4 41 12 19 97 33 SW San Bernardino Vly 69 61 0.3 44 11 19 71 34 C San Bernardino Vly 85 72 0.4 35 12 22 105 35 E San Bernardino Vly 83 70 0.4 38 11 23 100 36 W San Bernardino Mtns 76 70 0.4 38 11 23 100 37 C San Bernardino Mtns 83 76 0.4 36 8 27 118 38 Big Bear Lake 69 62 0.4 39 9 26 74 San Bernardino County: Mojave Desert Air Basin 39 Phelan 71 65 0.3 35 8 27 84 40 Hesperia 67 65 0.3 34 9 30 84 41 Trona 61 57 0.2 31 7 9 58 42 Victorville 74 70 0.3 34 11 29 100 43 Yucca Vly 77 66 0.2 43 12 21 87 44 Barstow 70 66 0.3 33 8 46 87 45 Twentynine Palms 60 56 0.2 41 11 18 55 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., JUL. 19, 2025, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Coastal Area AQI: 50 PM2.5 Inland Orange County AQI: 50 PM2.5 Temecula/Anza Area AQI: 50 PM2.5 MODERATE in the following area(s): Antelope Valley AQI: 93 Ozone Banning Pass Area AQI: 74 Ozone Big Bear Lake AQI: 74 Ozone Central Mojave Desert AQI: 87 Ozone Coachella Valley/Low Desert AQI: 74 Ozone Hemet/Elsinore Area AQI: 84 Ozone Metropolitan Area AQI: 53 PM2.5 Northern Mojave Desert AQI: 87 Ozone Riverside Valley AQI: 90 Ozone San Fernando/Santa Clarita Valleys AQI: 97 Ozone San Gabriel Mountains AQI: 84 Ozone San Gabriel Valley AQI: 97 Ozone Victor Valley AQI: 100 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): San Bernardino Mountains AQI: 118 Ozone San Bernardino Valley AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ A few remaining thunderstorms may linger through Saturday afternoon, mainly in the mountains and deserts. Temperatures will be within 2 degrees of Friday and areas west of the coastal mountains may start off cloudy before becoming partly sunny. Onshore winds will gust up to 25 mph at times, particularly in the Inland Empire, deserts and ridgetops. Inversion Base: 2338 FT | Breaking Temperature: 84 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2655 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: MARGINAL-BURN Burning is prohibited in the following source/receptor areas: 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 SATURDAY, JULY 19, 2025 IN THE SOUTH COAST AIR BASIN.