SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SAT., MAY. 15, 2021 -------------------------------------------------------------------------------- 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 47 43 0.2 17 12 9 50 2 NW Coastal LA 45 40 0.3 18 10 14 42 3 SW Coastal LA 37 35 0.3 17 10 12 42 4 S Coastal LA 40 36 0.2 16 10 16 42 5 Southeast LA Co 42 38 0.5 18 8 13 35 6 W San Fernando Vly 48 44 0.2 18 11 12 46 7 E San Fernando Vly 47 43 0.2 19 12 17 50 8 W San Gabriel Vly 49 44 0.2 21 12 14 50 9 E San Gabriel Vly 46 42 0.2 23 14 10 55 10 Pomona Walnut Vly 48 44 0.2 33 11 9 46 11 S San Gabriel Vly 50 44 0.2 20 11 6 46 12 S Central LA Co 45 41 0.5 17 8 9 38 13 Santa Clarita Vly 45 41 0.1 21 10 19 42 15 San Gabriel Mts 48 43 0.2 33 11 18 46 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 57 48 0.1 28 8 15 44 Orange County: South Coast Air Basin 16 N Orange Co 43 39 0.1 23 7 7 36 17 Central Orange Co 41 36 0.2 13 6 12 33 18 N Coastal Orange Co 27 21 0.2 14 7 15 29 19 Saddleback Vly 44 40 0.2 22 8 13 37 20 Central Coastal 40 35 0.2 15 7 13 32 21 Capistrano Vly 42 37 0.3 27 7 13 34 Riverside County: South Coast Air Basin 22 Norco/Corona 45 41 0.3 33 10 13 42 23 Metro Riverside Co 47 42 0.3 35 13 13 53 24 Perris Vly 46 44 0.3 24 7 20 41 25 Lake Elsinore 43 41 0.3 13 7 14 38 26 Temecula Vly 46 41 0.2 44 8 12 41 27 Anza Vly 48 46 0.2 54 11 11 50 28 Hemet/San Jacinto 48 45 0.3 36 9 18 42 29 Banning 61 51 0.2 27 13 9 53 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 68 64 0.3 75 18 10 80 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 57 55 0.2 35 7 8 51 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 53 48 0.2 39 11 13 46 33 SW San Bernardino Vly 48 44 0.2 36 10 12 42 34 C San Bernardino Vly 59 52 0.3 17 11 27 48 35 E San Bernardino Vly 64 55 0.3 24 9 23 51 36 W San Bernardino Mtns 56 51 0.2 33 11 14 47 37 C San Bernardino Mtns 61 57 0.3 26 10 23 58 38 Big Bear Lake 53 50 0.2 31 9 20 46 San Bernardino County: Mojave Desert Air Basin 39 Phelan 63 59 0.2 28 10 11 64 40 Hesperia 56 51 0.2 27 10 17 47 41 Trona 60 57 0.1 41 6 11 58 42 Victorville 59 56 0.2 30 11 8 54 43 Yucca Vly 63 57 0.2 31 11 9 58 44 Barstow 61 59 0.2 34 10 8 64 45 Twentynine Palms 57 54 0.2 31 9 9 50 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SAT., MAY. 15, 2021, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... GOOD in the following area(s): Antelope Valley AQI: 44 Ozone Big Bear Lake AQI: 46 Ozone Coastal Area AQI: 42 PM2.5 Hemet/Elsinore Area AQI: 42 Ozone Inland Orange County AQI: 37 Ozone Metropolitan Area AQI: 50 PM2.5 San Fernando/Santa Clarita Valleys AQI: 50 PM2.5 San Gabriel Mountains AQI: 46 PM2.5 Temecula/Anza Area AQI: 50 PM10 MODERATE in the following area(s): Banning Pass Area AQI: 53 PM2.5 Central Mojave Desert AQI: 58 Ozone Coachella Valley/Low Desert AQI: 80 Ozone Northern Mojave Desert AQI: 64 Ozone Riverside Valley AQI: 53 PM2.5 San Bernardino Mountains AQI: 58 Ozone San Bernardino Valley AQI: 51 Ozone San Gabriel Valley AQI: 55 PM2.5 Victor Valley AQI: 64 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Saturday will be cooler with temperatures 8-18 degrees below nomal. Many areas will have patchy drizzle. Onshore flow will strengthen There will be clouds. Inversion Base: 2990 FT | Breaking Temperature: 79 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 3581 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 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, MAY 15, 2021 IN THE SOUTH COAST AIR BASIN.