Technology Transfer Network / NAAQS
Ozone Implementation
1994 Air Quality Fact Sheet -
Ozone Design Values
Note: EPA no longer updates this information, but it may be useful as a reference or resource.Ozone Nonattainment Areas and Design Values - 1992-94 Update
Ozone Nonattainment Areas
1992-94 Update 1994 1994
Clean Air Act A.Q. Average 2nd Daily Estimated
State Nonattainment Area Name Classification Value Est. Exc. Max 1-hr Exceedances
AL Birmingham NA Area Marginal 0.124 0.7 0.108 0.0
AZ Phoenix Moderate 0.150 2.5 (#4) 0.121 0.0
CA Los Angeles South Coast Air Basin Extreme 0.280 103.3 0.240 88.0
CA Monterey Bay Unified NA Area Moderate 0.106 0.0 0.096 0.0
CA Sacramento Metro NA Area Severe 15 0.143 6.9 0.142 6.2
CA San Diego NA Area Serious 0.150 10.5 0.141 9.0
CA San Francisco-Bay NA Area Attainment 0.121 0.7 0.128 2.0
CA San Joaquin Valley NA Area Serious 0.160 20.9 0.165 32.1
CA Santa Barbara - Santa Maria - Moderate 0.129 1.7 0.129 3.1
CA Southeast Desert Modified AQMA Severe 17 0.190 47.5 0.184 25.3
CA Ventura Co NA Area Severe 15 0.146 10.3 0.162 16.5
CT Greater Connecticut NA Area Serious 0.147 2.4 0.148 2.0
DC-MD-VA Washington NA Area Serious 0.137 1.2 0.133 3.3
DE Sussex Co NA Area Marginal 0.110 0.0 0.099 0.0
FL Miami-Fort Lauderdale-W. Palm Beach Attainment 0.108 0.0 0.107 0.0
FL Tampa-St. Petersburg-Clearwater Marginal 0.103 0.0 0.101 0.0
GA Atlanta NA Area Serious 0.140 3.5 0.125 2.1
IL-IN Chicago-Gary-Lake County NA Area Severe 17 0.133 2.0 (#5) 0.124 1.2
IL Jersey Co NA Area Attainment 0.112 0.7 0.112 0.0
IN Evansville NA Area Marginal 0.113 0.0 0.114 0.0
IN Indianapolis NA Area Attainment 0.108 0.0 0.113 0.0
IN South Bend-Elkhart NA Area Attainment 0.102 0.0 0.106 0.0
KY Edmonson Co NA Area Attainment 0.092 0.0 0.090 0.0
KY-WV Huntington-Ashland NA Area Attainment 0.117 0.7 (#6) 0.130 2.1
KY Lexington-Fayette NA Area Marginal 0.106 0.0 0.110 0.0
KY-IN Louisville NA Area Moderate 0.130 2.0 0.133 3.0
KY Owensboro NA Area Attainment 0.106 0.3 0.107 1.0
KY Paducah NA Area Attainment 0.109 0.0 0.109 0.0
LA Baton Rouge NA Area Serious 0.139 1.8 0.139 2.0
LA Lake Charles NA Area Marginal 0.112 1.2 0.112 1.0
MA-NH Boston-Lawrence-Worcester NA Area Serious 0.136 2.7 0.125 2.0
MA Springfield (W. Mass) NA Area Serious 0.131 2.4 0.131 3.1
MD Baltimore NA Area Severe 15 0.135 3.8 0.151 5.0
MD Kent County and Queen Anne's Counties Marginal 0.121 0.7 0.105 0.0
ME Hancock Co and Waldo Co NA Area Marginal 0.102 0.0 0.092 0.0
ME Knox Co and Lincoln Co NA Area Moderate 0.122 0.4 0.115 0.0
ME Lewiston - Auburn NA Area Moderate 0.103 0.0 0.098 0.0
ME Portland NA Area Moderate 0.127 2.0 0.124 1.2
MI Detroit-Ann Arbor NA Area Attainment 0.122 0.7 0.137 2.0
MI Grands Rapids NA Area Moderate 0.106 0.7 0.114 0.0
MI Muskegon NA Area Moderate 0.124 1.0 0.117 1.0
MO-KS Kansas City NA Area Attainment 0.112 0.3 0.112 0.0
MO-IL St. Louis NA Area Moderate 0.128 2.1 0.147 4.2
NC Charlotte-Gastonia NA Area Attainment 0.119 0.7 0.114 0.0
NC Greensboro-Winston-Salem-High Point Attainment 0.113 0.3 0.111 0.0
NC Raleigh-Durham NA Area Attainment 0.118 0.7 0.111 0.0
NH Manchester NA Area Marginal 0.093 0.0 0.093 0.0
NH Portsmouth-Dover-Rochester, NH Serious 0.118 0.7 0.118 1.0
NJ Atlantic City NA Area Moderate 0.115 0.3 0.099 0.0
NV Reno Marginal 0.087 0.0 0.090 0.0
NM Sunland Park, NM Marginal 0.136 2.6 (#7) 0.136 2.0
NY Albany-Schenectady-Troy NA Area Marginal 0.109 0.3 0.116 1.0
NY Buffalo-Niagara Falls NA Area Marginal 0.098 0.0 0.095 0.0
NY Essex Co NA Area Marginal 0.103 0.0 0.087 0.0
NY Jefferson Co NA Area Marginal 0.098 0.0 0.098 0.0
NY-NJ-CT New York-N. New Jersey-Long Island Severe 17 0.165 4.4 0.174 4.0
NY Poughkeepsie NA Area Moderate 0.120 1.0 0.119 1.3
OH Canton NA Area Marginal 0.107 0.0 0.101 0.0
OH-KY Cincinnati-Hamilton NA Area Moderate 0.121 0.3 0.128 2.0
OH Cleveland-Akron-Lorain NA Area Moderate 0.117 0.5 0.125 2.0
OH Columbus NA Area Marginal 0.104 0.0 0.104 0.0
OH Dayton-Springfield NA Area Attainment 0.116 0.3 0.116 0.0
OH Toledo NA Area Attainment 0.119 0.3 0.117 1.0
OH-PA Youngstown-Warren-Sharon NA Area Marginal 0.106 0.0 0.111 0.0
OR-WA Portland-Vancouver AQMA NA Area Marginal 0.108 0.3 0.106 0.0
PA-NJ Allentown-Bethlehem-Easton NA Marginal 0.108 0.0 0.119 0.0
PA Altoona NA Area Marginal 0.104 0.0 0.106 0.0
PA Erie NA Area Marginal 0.107 0.0 0.101 0.0
PA Harrisburg-Lebanon-Carlisle NA Marginal 0.118 0.0 0.122 0.0
PA Johnstown NA Area Marginal 0.095 0.0 0.094 0.0
PA Lancaster NA Area Marginal 0.116 0.3 0.111 0.0
PA-NJ-DE-MD Philadelphia-Wilmington-Trenton Severe 15 0.140 4.0 0.140 4.0
PA Pittsburgh-Beaver Valley NA Area Moderate 0.121 0.7 0.122 1.0
PA Reading NA Area Moderate 0.106 0.3 0.106 1.0
PA Scranton-Wilkes-Barre NA Area Marginal 0.109 0.0 0.106 0.0
PA York NA Area Marginal 0.112 0.0 0.115 0.0
RI Providence (all of RI) NA Area Serious 0.121 1.1 0.120 1.2
SC Cherokee Co NA Area Attainment 0.105 0.3 0.100 0.0
TN Knoxville NA Area Attainment 0.117 0.0 0.109 0.0
TN Memphis NA Area Attainment 0.115 0.3 0.107 0.0
TN Nashville NA Area Moderate 0.124 1.0 0.123 1.0
TX Beaumont-Port Arthur NA Area Serious 0.124 1.1 0.121 1.1
TX Dallas-Fort Worth NA Area Moderate 0.138 3.0 0.146 7.5
TX El Paso NA Area Serious 0.136 3.4 0.143 5.7
TX Houston-Galveston-Brazoria NA Severe 17 0.202 6.5 0.172 15.2
UT Salt Lake City-Ogden NA Area Moderate 0.109 0.0 0.113 0.0
VA Norfolk-Virginia Beach-Newport Marginal 0.131 1.7 0.102 0.0
VA Symth County NA Area Marginal ND ND (#8) ND ND
VA Richmond-Petersburg NA Area Moderate 0.128 1.4 0.119 0.0
WA Seattle - Tacoma NA Area Marginal 0.108 0.7 0.133 2.0
WI Door Co NA Area Marginal 0.112 0.7 (#9) 0.125 2.0
WI Kewaunee Co NA Area Moderate 0.113 1.0 0.113 1.0
WI Manitowoc Co NA Area Moderate 0.138 2.0 0.138 2.0
WI Milwaukee-Racine NA Area Severe 17 0.133 1.7 0.134 3.0
WI Sheboygan NA Area Moderate 0.101 0.3 0.106 1.0
WI Walworth Co NA Area Marginal 0.098 0.0 0.094 0.0
WV Charleston NA Area Attainment 0.086 0.0 0.099 0.0
WV Greenbrier NA Area Attainment 0.097 0.0 0.100 0.0
WV Parkersburg NA Area Attainment 0.112 0.3 0.114 1.0
Additional Areas With Average Estimated Exceedances Greater than 1.0 for 1992-94
CA Mono County Unclassifiable 0.130 1.8 (#10) 0.120 1.2 CA Imperial County Transitional 0.150 10.9 (#11) 0.150 9.2 IN Warrick County Unclassifiable 0.131 1.7 (#12) 0.135 5.1
Totals:
77 Nonattainment Areas, 3 Additional Areas
Source:
EPA's air quality data system, the Aerometric Information Retrieval System
(AIRS), with supplemental data from EPA Regional Offices.
Notes:
1. Designations and classifications for ozone nonattainment areas as published in the Federal Register, 40 CFR Part 81. Unclassified and transitional nonattainment areas are not included in this listing.
2. The updated air quality value is estimated for the 1992-94 period using EPA guidance for calculating design values (Laxton Memorandum, June 18, 1990). Generally, the fourth highest monitored value with 3 complete years of data is selected as the updated air quality value because the standard allows one exceedance for each year. It is important to note that the 1990 Clean Air Act Amendments required that ozone nonattainment areas be classified on the basis of the design value at the time the Amendments were passed, generally the 1987-89 period was used.
3. The National Ambient Air Quality standard for ozone is 0.12 parts per million (ppm) daily maximum 1-hour average not to be exceeded more than once per year on average. The average estimated number of exceedances column shows the number of days the 0.12 ppm standard was exceeded on average at the site recording the highest updated air quality value. This is done after adjustment for incomplete, or missing days, during the 3-year period, 1992-94. The last two columns contain data from the site recording the highest second daily maximum 1-hour concentration in 1994. The last column shows the estimated exceedances for 1994 at the site recording the highest second maximum 1-hour concentration listed in the previous column.
4. Special purpose monitoring (SPM) operating during the ozone monitoring season.
5. The nonattainment/updated air quality value site for the Chicago NA Area is in Kenosha County, WI.
6. Calculation of the updated air quality value and estimated exceedances was derived by combining data from the new replacement site and the original site location.
7. This is a new nonattainment area established in July 1995. The area is adjacent to the El Paso, TX nonattainment area.
8. The site was located atop Whitetop Mountain, VA as part of the Mountain Cloud Study. Site elevation is 5520 feet. No data reported after 1988. This is a rural transport area. The nonattainment area is that portion of Whitetop Mountain above 4500 feet elevation.
9. Calculation of estimated exceedances in Wisconsin nonattainment areas is adjusted to account for the shorter Wisconsin ozone season not yet reflected in AIRS.
10. Exceedances are under review by the APCD.
11. A new monitoring site which started in October 1991.
12. A privately operated PSD monitoring site in Warrick County which is adjacent to the Evansville, IN and Owensboro, KY nonattainment areas.