2002 Almanac (page 76) Table 2-14 PM2.5 Air Quality Data Monitoring Planning Area / Site Name Year High 24-Hour Conc. (µg/m3) Average of Quarters (µg/m3)¹ Valid?¹ Number of Months² Number of Quarters² Number of Observations³ Bay Area AQMD Concord-2975 Treat Blvd 1999 56.6 12 No 10 4 110 2000 52.6 10.9 Yes 12 4 191 Fremont-Chapel Way 1999 56.5 13.9 No 12 4 76 2000 44.8 10.6 Yes 12 4 89 Livermore-793 Rincon Avenue 1999 63.1 28 No 1 1 9 2000 56.4 11.2 Yes 12 4 86 Redwood City 1999 59.7 12.1 No 11 4 68 2000 44 10.9 Yes 12 4 82 San Francisco-Arkansas Street 1999 71.2 12.6 No 11 4 121 2000 47.9 11.4 No 12 4 193 San Jose-4th Street 1999 70 12.3 No 10 4 117 2000 64.2 13.6 Yes 12 4 180 San Jose-Tully Road 1999 77 14.5 No 10 4 117 2000 67.2 12.2 No 12 4 188 Santa Rosa-5th Street 1999 54.9 12.1 No 12 4 69 2000 40.1 10.3 Yes 12 4 91 Vallejo-304 Tuolumne Street 1999 90.5 14.1 No 10 4 63 2000 60.1 11.6 Yes 12 4 90 Coachella Valley Indio-Jackson Street 1999 29.6 12.8 No 10 4 83 2000 28.6 11.2 Yes 12 4 115 Palm Springs-Fire Station 2000 28.5 9.6 Yes 12 4 120 Great Basin Unified APCD Keeler-Cerro Gordo Road 1999 40.7 7.2 No 10 4 69 2000 68 9.6 No 8 3 72 Mammoth Lakes-Gateway HC 2000 31 18 No 2 1 13 Imperial County APCD Brawley-Main Street 1999 44.2 11.2 No 8 4 65 2000 55.4 12.3 No 11 4 76 Calexico-Ethel Street 1999 51.6 15.2 Yes 12 4 106 2000 84.2 16.9 Yes 12 4 113 El Centro-9th Street 1999 52.5 11.7 No 12 4 103 2000 55.6 10.4 No 10 4 86 Lake County Air Basin Lakeport-Lakeport Blvd 1999 14.5 4.4 No 12 4 47 2000 9.4 4 No 6 2 28 Lake Tahoe Air Basin Echo Summit 2000 10 3.8 Yes 12 4 122 South Lake Tahoe-Sandy Way 1999 21 8.3 Yes 12 4 59 2000 23 7.8 Yes 12 4 59 Mojave Desert Air Basin Lancaster-W Pondera Street 1999 47.6 11.2 Yes 12 4 113 2000 36 10.5 Yes 12 4 113 Mojave-923 Poole Street 1999 27.6 8.5 No 11 4 99 2000 28.7 7.5 No 12 4 74 Ridgecrest-Las Flores Avenue 1999 22.9 8.5 No 7 3 48 2000 38.6 7.8 No 12 4 91 Victorville-Armagosa Road 1999 25.4 11.9 Yes 12 4 114 Victorville-14306 Park Avenue 2000 31 11.9 Yes 12 4 115 Monterey Bay Unified APCD Salinas-Natividad Road #2 1999 30.8 9.8 No 11 4 102 Salinas-#3 2000 26.4 7.9 No 12 4 73 Santa Cruz-2544 Soquel Avenue 1999 31.4 9.4 No 11 4 89 2000 23.3 7.9 No 12 4 72 Mountain Counties Air Basin Grass Valley-Litton Building 1999 31 7.6 No 12 4 52 2000 27 6.2 No 12 4 45 Portola-Commercial Street 1999 70 11.7 No 7 3 46 Portola-161 Nevada Street 2000 46 10.6 No 8 3 67 Quincy-N Church Street 1999 92 13.3 No 10 4 73 2000 37 9.4 No 12 4 104 San Andreas-Gold Strike Road 1999 33 11.1 Yes 12 4 59 2000 48 9 Yes 12 4 63 Truckee-Fire Station 1999 50 9 No 8 4 46 2000 23 8.8 Yes 12 4 111 North Coast Air Basin Eureka-Health Dept 6th and I Street 1999 36.9 9.1 Yes 12 4 59 2000 24 9.1 Yes 12 4 58 Ukiah-County Library 1999 35.6 8.9 Yes 12 4 58 2000 20 7.2 No 12 4 57 Northeast Plateau Air Basin Alturas-W 4th Street 1999 40 7.9 Yes 12 4 56 2000 38 8.5 Yes 12 4 58 Sacramento Valley Air Basin Chico-Manzanita Avenue 1999 73 17.5 Yes 12 4 59 2000 98 15.8 Yes 12 4 61 Colusa-Sunrise Blvd 1999 55 13.2 No 12 4 85 2000 28 8 Yes 12 4 114 Redding-Health Dept Roof 1999 57 12.9 Yes 12 4 57 2000 45 9.2 No 12 4 55 Roseville-N Sunrise Blvd 1999 79 13.4 Yes 12 4 59 2000 51 12.2 Yes 12 4 59 Sacramento-Del Paso Manor 1999 86 23.7 No 7 3 66 2000 81 11.3 No 9 3 38 Sacramento-Health Dept Stockton Blvd 1999 86 16.2 Yes 11 4 158 2000 65 10.3 No 8 3 128 Sacramento-T Street 1999 108 17 Yes 12 4 264 2000 67 12.3 Yes 12 4 331 Woodland-Gibson Road 1999 70 16.3 Yes 11 4 98 2000 46 10.3 Yes 12 4 116 Yuba City-Almond Street 1999 58 15.9 Yes 12 4 58 2000 44 11.2 Yes 12 4 61 San Diego County APCD Chula Vista 1999 47.1 14.5 No 12 4 103 2000 40.5 13.1 Yes 12 4 101 El Cajon-Redwood Avenue 1999 47 16.4 Yes 12 4 321 2000 65.5 15.7 Yes 12 4 292 Escondido-E Valley Parkway 1999 64.3 18 Yes 12 4 255 2000 65.9 15.8 Yes 12 4 305 San Diego-12th Avenue 1999 46.9 17.7 Yes 12 4 289 2000 66.3 15.6 Yes 12 4 273 San Diego-Overland Avenue 1999 43.4 14.1 No 12 4 85 2000 48.5 12.4 Yes 12 4 101 San Joaquin Valley Unified APCD Bakersfield-5558 California Avenue 1999 134.8 31.2 Yes 12 4 294 2000 112.7 23 Yes 12 4 329 Bakersfield-Golden State Highway 1999 133.9 26.2 Yes 12 4 84 2000 108.1 22.6 Yes 12 4 91 Bakersfield-410 E Planz Road 2000 91 20.3 Yes 11 4 102 Clovis-N Villa Avenue 1999 97.7 19.8 Yes 12 4 82 2000 75.1 16.3 Yes 12 4 70 Corcoran-Patterson Avenue 1999 53.1 14.3 No 8 3 44 2000 76 16.4 Yes 11 4 67 Fresno-1st Street 1999 136 27.7 Yes 12 4 275 2000 160 25.5 No 9 4 194 Fresno-Pacific College 2000 83.5 18.4 Yes 12 4 77 Merced-2334 M Street 1999 108.7 22.6 No 9 3 53 2000 86.1 17.3 Yes 12 4 88 Modesto-14th Street 1999 108 24.9 Yes 12 4 117 2000 77 18.7 Yes 12 4 122 Stockton-Hazelton Street 1999 101 19.7 Yes 12 4 117 2000 78 15.5 Yes 12 4 123 Visalia-N Church Street 1999 123 27.6 Yes 12 4 117 2000 105 23.9 Yes 12 4 115 San Luis Obispo County APCD Atascadero-Lewis Avenue 1999 27.5 9.6 Yes 12 4 59 2000 52.7 10.8 Yes 12 4 58 San Luis Obispo-Marsh Street 1999 20 8.2 Yes 12 4 54 2000 28.2 8.3 No 12 4 55 Santa Barbara County APCD Santa Barbara-W Carillo Street 1999 21.3 12.9 No 6 4 15 2000 24.2 13.1 No 10 4 44 Santa Maria-Broadway 1999 24.3 11.4 No 5 2 22 2000 28.7 9.8 Yes 12 4 57 South Coast Air Basin Anaheim-Harbor Blvd 1999 68.6 25.9 No 8 4 92 2000 113.9 20.3 Yes 12 4 273 Azusa 1999 81.3 25 Yes 12 4 144 2000 92.5 20.2 Yes 12 4 333 Big Bear City-501 W. Valley Blvd 1999 32.1 10.3 Yes 11 4 97 2000 29 10.2 No 12 4 59 Burbank-W Palm Avenue 1999 79.4 22.9 Yes 12 4 106 2000 84.4 21.2 No 9 4 70 Fontana-Arrow Highway 1999 97.9 25.7 Yes 12 4 121 2000 72.9 24.5 Yes 12 4 112 Los Angeles-North Main Street 1999 69.3 23 Yes 12 4 136 2000 87.8 21.9 Yes 12 4 334 Lynwood 1999 67.7 24.3 Yes 12 4 110 2000 82.1 23 Yes 12 4 121 Mission Viejo-26081 Via Pera 1999 56.6 17 No 7 3 65 2000 94.7 14.7 Yes 12 4 119 North Long Beach 1999 66.9 20.7 Yes 12 4 148 2000 81.5 19.6 Yes 12 4 304 Ontario-1408 Francis Street 1999 85.8 25.4 Yes 12 4 96 2000 73.4 24.1 Yes 12 4 111 Pasadena-S Wilson Avenue 1999 73 19.9 No 10 4 95 2000 66.3 19.4 Yes 12 4 110 Pico Rivera 1999 85.6 25.7 Yes 12 4 111 2000 89.5 24 Yes 12 4 116 Reseda 1999 79 17.3 Yes 10 4 71 2000 67.5 18 Yes 12 4 108 Riverside-Magnolia 1999 89.9 26.7 Yes 12 4 110 2000 79.3 25.3 Yes 12 4 111 Riverside-Rubidoux 1999 111.2 31 Yes 12 4 137 2000 119.6 28.3 Yes 12 4 304 San Bernardino-4th Street 1999 121.4 25.6 Yes 12 4 104 2000 89.8 25.9 Yes 12 4 92 Ventura County APCD El Rio-Rio Mesa School #2 1999 36.7 12.2 No 12 4 92 2000 45.7 13 No 12 4 106 Piru-3301 Pacific Avenue 2000 37.6 10.7 No 2 1 13 Simi Valley-Cochran Street 1999 64.6 13.8 Yes 12 4 109 2000 55.3 14.8 No 12 4 102 Thousand Oaks-Moorpark Road 1999 53.2 11.8 Yes 12 4 110 2000 53.7 13.3 No 12 4 103 Footnotes: "1. Average of Quarters and Valid? are calculated according to the methods specified in 40 CFR Part 50, Appendix N." "Typically, a year is complete, and the Average of Quarters is therefore valid, if 75% or more of the expected " "measurements are available in each quarter. Under certain circumstances, however, an Average of Quarters " "can be deemed valid with fewer measurements (see 40 CFR Part 50, Appendix N for details)." "2. Number of Months and Number of Quarters are the number of months and quarters, respectively, that include " at least one measurement. 3. Number of Observations is the total number of 24-hour measurements represented at each site.