SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: FRI., JUL. 18, 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 49 42 0.7 24 11 23 55 2 NW Coastal LA 40 35 0.3 25 9 13 50 3 SW Coastal LA 36 32 0.1 24 8 10 44 4 S Coastal LA 41 36 0.2 23 8 21 44 5 Southeast LA Co 49 40 0.5 25 9 20 50 6 W San Fernando Vly 62 56 0.4 26 10 12 54 7 E San Fernando Vly 59 51 0.5 27 11 18 55 8 W San Gabriel Vly 63 52 0.3 30 10 15 53 9 E San Gabriel Vly 82 68 0.4 33 11 22 93 10 Pomona Walnut Vly 81 66 0.4 36 11 21 87 11 S San Gabriel Vly 54 45 0.3 29 10 19 53 12 S Central LA Co 47 39 0.3 23 8 14 44 13 Santa Clarita Vly 81 66 0.2 29 11 17 87 15 San Gabriel Mts 72 61 0.3 35 10 23 71 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 70 64 0.2 39 11 26 80 Orange County: South Coast Air Basin 16 N Orange Co 53 44 0.2 32 9 11 50 17 Central Orange Co 45 37 0.3 19 9 9 50 18 N Coastal Orange Co 44 39 0.2 22 8 18 44 19 Saddleback Vly 52 45 0.2 32 9 13 50 20 Central Coastal 47 42 0.2 25 8 13 44 21 Capistrano Vly 48 43 0.3 27 8 13 44 Riverside County: South Coast Air Basin 22 Norco/Corona 64 55 0.3 43 10 16 53 23 Metro Riverside Co 81 69 0.3 48 12 18 97 24 Perris Vly 78 65 0.3 37 10 23 84 25 Lake Elsinore 69 61 0.3 27 8 13 71 26 Temecula Vly 54 47 0.2 31 8 12 44 27 Anza Vly 59 53 0.2 34 10 12 53 28 Hemet/San Jacinto 73 62 0.3 36 9 23 74 29 Banning 80 68 0.3 35 9 16 93 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 75 69 0.2 51 10 11 97 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 45 43 0.1 34 8 11 44 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 75 63 0.4 36 12 20 77 33 SW San Bernardino Vly 70 58 0.4 43 12 23 61 34 C San Bernardino Vly 90 69 0.3 39 11 30 97 35 E San Bernardino Vly 91 70 0.3 38 10 26 100 36 W San Bernardino Mtns 79 67 0.3 36 10 24 90 37 C San Bernardino Mtns 79 67 0.3 38 8 28 90 38 Big Bear Lake 64 57 0.3 37 8 25 58 San Bernardino County: Mojave Desert Air Basin 39 Phelan 78 68 0.3 35 8 22 93 40 Hesperia 74 66 0.3 32 8 25 87 41 Trona 65 61 0.1 35 8 8 71 42 Victorville 69 64 0.3 33 9 20 80 43 Yucca Vly 79 70 0.2 40 8 19 100 44 Barstow 67 61 0.2 30 8 38 71 45 Twentynine Palms 65 60 0.2 39 8 17 67 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON FRI., JUL. 18, 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 MODERATE in the following area(s): Antelope Valley AQI: 80 Ozone Banning Pass Area AQI: 93 Ozone Big Bear Lake AQI: 58 Ozone Central Mojave Desert AQI: 100 Ozone Coachella Valley/Low Desert AQI: 97 Ozone Hemet/Elsinore Area AQI: 84 Ozone Metropolitan Area AQI: 55 PM2.5 Northern Mojave Desert AQI: 71 Ozone Riverside Valley AQI: 97 Ozone San Bernardino Mountains AQI: 90 Ozone San Bernardino Valley AQI: 100 Ozone San Fernando/Santa Clarita Valleys AQI: 87 Ozone San Gabriel Mountains AQI: 71 Ozone San Gabriel Valley AQI: 93 Ozone Temecula/Anza Area AQI: 53 PM2.5 Victor Valley AQI: 93 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ The risk of thunderstorms over the Riverside and San Bernardino County mountains continues through Friday before monsoonal moisture dissipates late in the day. Clouds will initially cover most areas before thinning out. Temperatures will be 1-5 degrees cooler than Thursday except in the Coachella Valley where it will be a few degrees warmer. Winds will be light to moderate, from the west. Inversion Base: 2309 FT | Breaking Temperature: 82 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 2442 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: 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 FRIDAY, JULY 18, 2025 IN THE SOUTH COAST AIR BASIN.