Air Quality Index Workfile format

 

The AQI workfile is a fixed field length text file

 

 

 

Start Position

Field Length

Field Name

Note

 

1

2

State Code

Populated only if grouping by State, State – City, or State - County

3

3

County Code

Populated only if grouping by State – County

6

5

City Code

Populated only if grouping by State – City

11

4

UAR Code

Populated only if grouping by Urban Area

15

4

MSA Code

Populated only if grouping by MSA

19

8

AQI Date

In YYYYMMDD Format

27

5

AQI Value 1

Highest AQI Value for the day

32

5

Parameter Code 1

Parameter associated with the highest value for the day

37

1

Duration Code 1

Duration associated with the highest value for the day.

38

30

AQI Category

Category of the highest value for the day.

68

9

Max AQI Site Id 1

Site where the maximum value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

77

5

Number of AQI Sites 1

Number of distinct sites that attempted to acquire an AQI value for the parameter - day

82

5

AQI Value 2

2nd Highest AQI Value for the day

87

5

Parameter Code 2

Parameter associated with the 2nd highest value for the day

92

1

Duration Code 2

Duration associated with the 2nd highest value for the day.

93

9

Max AQI Site Id 2

Site where the 2nd highest value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

102

5

Number of AQI Sites 2

Number of distinct sites that attempted to acquire an AQI value for the parameter - day

107

5

AQI Value 3

3rd Highest AQI Value for the day

112

5

Parameter Code 3

Parameter associated with the 3rd highest value for the day

117

1

Duration Code 3

Duration associated with the 3rd highest value for the day.

118

9

Max AQI Site Id 3

Site where the 3rd highest value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

127

5

Number of AQI Sites 3

Number of distinct sites that attempted to acquire an AQI value for the parameter - day

132

5

AQI Value 4

4th Highest AQI Value for the day

137

5

Parameter Code 4

Parameter associated with the 4th highest value for the day

142

1

Duration Code 4

Duration associated with the 4th highest value for the day.

143

9

Max AQI Site Id 4

Site where the 4th highest value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

152

5

Number of AQI Sites 4

Number of distinct sites that attempted to acquire an AQI value for the parameter - day

157

5

AQI Value 5

5th Highest AQI Value for the day

162

5

Parameter Code 5

Parameter associated with the 5th highest value for the day

167

1

Duration Code 5

Duration associated with the 5th highest value for the day.

168

9

Max AQI Site Id 5

Site where the 5th highest value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

177

5

Number of AQI Sites 5

Number of distinct sites that attempted to acquire an AQI value for the parameter – day

182

5

AQI Value 6

6th Highest AQI Value for the day

187

5

Parameter Code 6

Parameter associated with the 6th highest value for the day

192

1

Duration Code 6

Duration associated with the 6th highest value for the day.

193

9

Max AQI Site Id 6

Site where the 6th highest value occurred. SSCCCTTTT format where "SS’ is a 2-digit state code, "CCC" is a 3-digit county code and TTTT is the 4-digit Site ID.

202

5

Number of AQI Sites 6

Number of distinct sites that attempted to acquire an AQI value for the parameter – day