SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT DAILY AIR QUALITY FORECAST VALID: SUN., SEP. 20, 2020 -------------------------------------------------------------------------------- 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 69 59 0.5 35 21 25 70 2 NW Coastal LA 63 52 0.6 33 27 14 82 3 SW Coastal LA 53 43 0.2 33 22 23 72 4 S Coastal LA 50 42 0.5 32 17 20 61 5 Southeast LA Co 62 55 0.6 34 19 23 66 6 W San Fernando Vly 73 66 0.4 32 26 18 87 7 E San Fernando Vly 73 64 0.5 35 29 21 87 8 W San Gabriel Vly 82 70 0.5 36 30 19 100 9 E San Gabriel Vly 84 72 0.5 39 19 24 105 10 Pomona Walnut Vly 77 71 0.6 41 19 32 101 11 S San Gabriel Vly 76 66 0.5 36 19 22 87 12 S Central LA Co 57 50 0.6 33 23 18 74 13 Santa Clarita Vly 87 71 0.3 33 19 13 101 15 San Gabriel Mts 81 70 0.5 39 36 21 102 Los Angeles County: Mojave Desert Air Basin 14 Antelope Vly 76 64 0.2 34 20 14 80 Orange County: South Coast Air Basin 16 N Orange Co 67 58 0.5 43 18 14 63 17 Central Orange Co 58 52 0.3 25 17 17 61 18 N Coastal Orange Co 45 44 0.4 28 11 19 46 19 Saddleback Vly 58 50 0.4 43 14 20 55 20 Central Coastal 48 47 0.4 28 14 15 55 21 Capistrano Vly 53 49 0.4 30 18 13 63 Riverside County: South Coast Air Basin 22 Norco/Corona 83 71 0.5 62 20 25 101 23 Metro Riverside Co 81 72 0.8 71 21 28 105 24 Perris Vly 72 63 0.5 48 11 26 77 25 Lake Elsinore 62 54 0.4 29 9 11 50 26 Temecula Vly 59 55 0.4 32 10 13 51 27 Anza Vly 57 53 0.3 34 10 14 49 28 Hemet/San Jacinto 60 56 0.4 42 9 23 54 29 Banning 60 57 0.3 38 11 19 58 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 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 61 56 0.3 37 21 17 70 Riverside County: Mojave Desert Air Basin 31 E Riverside Co 55 50 0.3 31 15 15 57 San Bernardino County: South Coast Air Basin 32 NW San Bernardino Vly 90 77 0.5 34 20 22 122 33 SW San Bernardino Vly 84 73 0.5 61 18 29 108 34 C San Bernardino Vly 78 71 0.2 47 15 33 101 35 E San Bernardino Vly 78 75 0.6 52 14 27 115 36 W San Bernardino Mtns 80 73 0.5 36 16 28 108 37 C San Bernardino Mtns 87 81 0.4 44 13 30 136 38 Big Bear Lake 59 56 0.3 41 40 28 112 San Bernardino County: Mojave Desert Air Basin 39 Phelan 75 65 0.5 32 11 29 84 40 Hesperia 64 59 0.5 26 11 32 64 41 Trona 60 55 0.6 26 18 23 63 42 Victorville 64 60 0.6 34 13 32 67 43 Yucca Vly 58 51 0.3 34 20 24 68 44 Barstow 66 58 0.5 43 36 44 102 45 Twentynine Palms 52 50 0.3 40 36 22 102 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- AIR QUALITY FORECAST -------------------------------------------------------------------------------- ON SUN., SEP. 20, 2020, THE SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT PREDICTS THE AIR QUALITY WILL BE ... MODERATE in the following area(s): Antelope Valley AQI: 80 Ozone Banning Pass Area AQI: 58 Ozone Coachella Valley/Low Desert AQI: 70 PM2.5 Coastal Area AQI: 82 PM2.5 Hemet/Elsinore Area AQI: 77 Ozone Inland Orange County AQI: 63 PM2.5 Metropolitan Area AQI: 74 PM2.5 Temecula/Anza Area AQI: 51 Ozone Victor Valley AQI: 84 Ozone UNHEALTHY FOR SENSITIVE GROUPS in the following area(s): Big Bear Lake AQI: 112 PM2.5 Central Mojave Desert AQI: 102 PM2.5 Northern Mojave Desert AQI: 102 PM2.5 Riverside Valley AQI: 105 Ozone San Bernardino Mountains AQI: 136 Ozone San Bernardino Valley AQI: 122 Ozone San Fernando/Santa Clarita Valleys AQI: 101 Ozone San Gabriel Mountains AQI: 102 PM2.5 San Gabriel Valley AQI: 105 Ozone ------------------------------------------------------------------------ ------------------------------------------------------------------------ WEATHER FORECAST ------------------------------------------------------------------------ Slightly cooler temperatures and costal low clouds and fog are predicted for Sunday. Onshore flow and light winds are predicted. Inversion Base: 1491 FT | Breaking Temperature: 87 DEG F Inversion Breaking: NO | Maximum Mixing HEIGHT: 1710 FT ------------------------------------------------------------------------ ------------------------------------------------------------------------ AIR QUALITY FORECAST RULE IMPLICATIONS ------------------------------------------------------------------------ Area 40 - South Coast Air Basin: NO-BURN Area 53 - Mojave Desert Air Basin: MARGINAL-BURN Area 55 - Salton Sea Air Basin: MARGINAL-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 SUNDAY, SEPTEMBER 20, 2020 IN THE SOUTH COAST AIR BASIN.