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EPA Air Quality Monitoring Sites

The Air Quality Monitoring data in LandView is extracted from the 
Aerometric Information Retrieval System (AIRS). Maintained by the 
Office of Air and Radiation, AIRS stores information on air quality, 
point source emissions, and area/mobile source data required by 
federal regulation from the 50 states. Monitoring is required for 
criteria pollutants (identified through the Clean Air Act) based on 
population, pollutant sources, geographical area, etc. Data in the 
system is available to the public through agency publications in NTIS. 
LandView III uses the symbol "Q" when displaying Air Quality Monitoring 
sites. The fields containing "# or exceptions" refer to the number of 
observations that were in violation of standards. The database structure, 
including field names, data types, field lengths, number of decimal 
places, and field descriptions for file AIR_QUAL.DBF are as follows:

ADDRESS C 40
Site Address

STATE C 2
STATE ABBRIEVIATION

SITE_ID C 9
Site ID

YEAR1 C 2
Year 1

YEAR2 C 2
Year 2

YEAR3 C 2
Year 3

YEAR4 C 2
Year 4

CO_YR1EXC N 5
Carbon Monoxide Yr 1, # of exceptions

CO_YR1MAX N 8 3
Carbon Monoxide Yr 1, max

CO_YR1OBS N 5
Carbon Monoxide Yr 1, # observations

CO_YR2EXC N 5
Carbon Monoxide Yr 2, # of exceptions

CO_YR2MAX N 8 3
Carbon Monoxide Yr 2, max

CO_YR2OBS N 5
Carbon Monoxide Yr 2, # observations

CO_YR3EXC N 5
Carbon Monoxide Yr 3, # of exceptions

CO_YR3MAX N 8 3
Carbon Monoxide Yr 3, max

CO_YR3OBS N 5
Carbon Monoxide Yr 3, # observations

CO_YR4EXC N 5
Carbon Monoxide Yr 4, # of exceptions

CO_YR4MAX N 8 3
Carbon Monoxide Yr 4, max

CO_YR4OBS N 5
Carbon Monoxide Yr 4, # observations

NO2_YR1EXC N 5
Nitrogen Dioxide Yr 1, # of exceptions

NO2_YR1MAX N 8 3
Nitrogen Dioxide Yr 1, max

NO2_YR1OBS N 5
Nitrogen Dioxide Yr. 1, # observations

NO2_YR2EXC N 5
Nitrogen Dioxide Yr 2, # of exceptions

NO2_YR2MAX N 8 3
Nitrogen Dioxide Yr 2, max

NO2_YR2OBS N 5
Nitrogen Dioxide Yr 2, # observations

NO2_YR3EXC N 5
Nitrogen Dioxide Yr 3, # of exceptions

NO2_YR3MAX N 8 3
Nitrogen Dioxide Yr 3, max

NO2_YR3OBS N 5
Nitrogen Dioxide Yr 3, # observations

NO2_YR4EXC N 5
Nitrogen Dioxide Yr 4, # of exceptions

NO2_YR4MAX N 8 3
Nitrogen Dioxide Yr 4, max

NO2_YR4OBS N 5
Nitrogen Dioxide Yr 4, # observations

O3_YR1EXC N 5
Ozone Yr 1, # of exceptions

O3_YR1MAX N 8 3
Ozone Yr 1, max

O3_YR1OBS N 5
Ozone Yr 1, # observations

O3_YR2EXC N 5
Ozone Yr 2, # of exceptions

O3_YR2MAX N 8 3
Ozone Yr 2, max

O3_YR2OBS N 5
Ozone Yr 2, # observations

O3_YR3EXC N 5
Ozone Yr 3, # of exceptions

O3_YR3MAX N 8 3
Ozone Yr 3, max

O3_YR3OBS N 5
Ozone Yr 3, # observations

O3_YR4EXC N 5
Ozone Yr 4, # of exceptions

O3_YR4MAX N 8 3
Ozone Yr 4, max

O3_YR4OBS N 5
Ozone Yr 4, # observations

PB_YR1EXC N 5
Lead Yr 1, # of exceptions

PB_YR1MAX N 8 3
Lead Yr 1, max

PB_YR1OBS N 5
Lead Yr 1, # observations

PB_YR2EXC N 5
Lead Yr 2, # of exceptions

PB_YR2MAX N 8 3
Lead Yr 2, max

PB_YR2OBS N 5
Lead Yr 2, # observations

PB_YR3EXC N 5
Lead Yr 3, # of exceptions

PB_YR3MAX N 8 3
Lead Yr 3, max

PB_YR3OBS N 5
Lead Yr 3, # observations

PB_YR4EXC N 5
Lead Yr 4, # of exceptions

PB_YR4MAX N 8 3
Lead Yr 4, max

PB_YR4OBS N 5
Lead Yr 4, # observations

PM_YR1EXC N 5
Particulate Matter Yr 1, # of exceptions

PM_YR1MAX N 8 3
Particulate Matter Yr 1, max

PM_YR1OBS N 5
Particulate Matter Yr 1, # observations

PM_YR2EXC N 5
Particulate Matter Yr 2, # of exceptions

PM_YR2MAX N 8 3
Particulate Matter Yr 2, max

PM_YR2OBS N 5
Particulate Matter Yr 2, # observations

PM_YR3EXC N 5
Particulate Matter Yr 3, # of exceptions

PM_YR3MAX N 8 3
Particulate Matter Yr 3, max

PM_YR3OBS N 5
Particulate Matter Yr 3, # observations

PM_YR4EXC N 5
Particulate Matter Yr 4, # of exceptions

PM_YR4MAX N 8 3
Particulate Matter Yr 4, max

PM_YR4OBS N 5
Particulate Matter Yr 4, # observations

SO2_YR1EXC N 5
Sulfur Dioxide Yr 1, # of exceptions

SO2_YR1MAX N 8 3
Sulfur Dioxide Yr 1, max

SO2_YR1OBS N 5
Sulfur Dioxide Yr 1, # observations

SO2_YR2EXC N 5
Sulfur Dioxide Yr 2, # of exceptions

SO2_YR2MAX N 8 3
Sulfur Dioxide Yr 2, max

SO2_YR2OBS N 5
Sulfur Dioxide Yr 2, # observations

SO2_YR3EXC N 5
Sulfur Dioxide Yr 3, # of exceptions

SO2_YR3MAX N 8 3
Sulfur Dioxide Yr 3, max

SO2_YR3OBS N 5
Sulfur Dioxide Yr 3, # observations

SO2_YR4EXC N 5
Sulfur Dioxide Yr 4, # of exceptions

SO2_YR4MAX N 8 3
Sulfur Dioxide Yr 4, max

SO2_YR4OBS N 5
Sulfur Dioxide Yr 4, # observations

TSP_YR1EXC N 5
Total Particulate Suspended Matter Yr 1, # of exceptions

TSP_YR1MAX N 8 3
Total Particulate Suspended Matter Yr 1, max

TSP_YR1OBS N 5
Total Particulate Suspended Matter Yr 1, # observations

TSP_YR2EXC N 5
Total Particulate Suspended Matter Yr 2, # of exceptions

TSP_YR2MAX N 8 3
Total Particulate Suspended Matter Yr 2, max

TSP_YR2OBS N 5
Total Particulate Suspended Matter Yr 2, # observations

TSP_YR3EXC N 5
Total Particulate Suspended Matter Yr 3, # of exceptions

TSP_YR3MAX N 8 3
Total Particulate Suspended Matter Yr 3, max

TSP_YR3OBS N 5
Total Particulate Suspended Matter Yr 3, # observations

TSP_YR4EXC N 5
Total Particulate Suspended Matter Yr 4, # of exceptions

TSP_YR4MAX N 8 3
Total Particulate Suspended Matter Yr 4, max

TSP_YR4OBS N 5
Total Particulate Suspended Matter Yr 4, # observations

ST_COUNTY C 5
FIPS STATE_COUNTY CODE

LAT_DMS C 6
LATITUDE, in degrees, minutes, seconds

LONG_DMS C 7
LONGITUDE, in degrees, minutes, seconds

LATITUDE C 10
LATITUDE

LONGITUDE C 11
LONGITUDE

IDMARPLOT C 16
MARPLOT ID Number