AQS Codes and Descriptions
Unless indicated otherwise, links on this page are to Excel spreadsheets created with Discoverer.
- Agency Codes*
- listed by Name (No Tribes) (7/25/12, 196K)
- listed within states (No Tribes) (7/25/12, 240K)
- Tribal Agencies (7/25/12, 25K)
- City names (by state) (163 pp, 377K, About PDF)
- Collection Frequency Codes (8/18/10, 28K)
- CBSA (Core-Based Statistical Area) codes - replaces MSA codes (9/27/08)
- CSA (Combined Statistical Area) codes - replaces CMSA codes (9/27/08)
- CMSAs (9/27/07, 8K)
- MSAs - sorted by code (9/27/07, 41K)
- Monitor Types (6/26/08, 3.5K)
- Pollutant Standard IDs and Descriptions (2/10/11, 12K)
- Sample Duration Codes (3/19/10, 20K)
- Protocols with Sampling Methodologies
- All Pollutants (11/7/11, 3,452K)
- Criteria Pollutants only (11/7/11, 313K)
- CORE HAPs only (11/7/11, 523K)
- HAPS only (11/7/11, 1143K)
- IMPROVE Carbon (11/7/11, 37K)
- IMPROVE Speciation (11/7/11, 145K)
- MET only (11/7/11, 131K)
- PAMS only (11/7/11, 1005K)
- PAMS VOC only (11/7/11, 834K)
- PM10 Speciation (11/7/11, 204K)
- PM Coarse (11/7/11, 25K)
- PM2.5 Cont NONRefs (11/7/11, 63K)
- PM2.5 Mass and QA (11/7/11, 92K)
- Speciation Cation/Anion (11/7/11, 33K)
- Speciation (11/7/11, 315K)
- Speciation Carbon (11/7/11, 73K)
- Speciation Metals (11/7/11, 146K)
- UATMP Carbonyl (11/7/11, 185K)
- UATMP VOC (11/7/11, 895K)
- Pollutant (Parameter) Codes
- all pollutants (parameters) by codes (6/23/11, 183K)
- all pollutants by description (6/23/11, 183K)
- parameters with CAS numbers** (6/23/11, 159K)
- Parameters with allowed Qualifier Codes (7/28/11, 2,343K)
- Parameters with Exceptional Event Qualifiers (8/23/10, 25K)
- Null Data Codes
Old Format (8/18/10, 28K)
- Qualifier Codes (8/18/10, 36K)
- State and County codes (9/27/07, 327K)
- Units - sorted by code (8/18/10, 33K)
- Units - sorted by description (8/23/10, 15K)
*Agency Codes are unique to the agency within AQS. If an agency you need already exists, but is not shown for your state, contact NADG to have your state added to the list of states that can use that agency code.
**All parameter codes used by AQS do not have CAS numbers. This table lists only those with CAS numbers.