---
id: "us_aqs_parameter_code"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["environment", "chemistry"]
country: ["US"]
langs: ["common"]
quality: 80
url: "https://registry.apicrafter.io/datatype/us_aqs_parameter_code"
---

# US EPA AQS parameter code (`us_aqs_parameter_code`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Five-digit code of a measured parameter in the EPA Air Quality System (a pollutant, a meteorological or other quantity), used in AQS submissions and in the AirData files, for example 44201 ozone, 42401 sulfur dioxide, 42602 nitrogen dioxide, 42101 carbon monoxide, 88101 PM2.5 at local conditions and 81102 PM10. The AQS code table lists about 1,500 codes from 11101 to 99999. The regexp only checks five digits, so recognize the code with column context.

- Personal data (PII): no
- Categories: Environment (protected areas, biodiversity, water, weather, emissions, waste) (environment), Chemistry (chemistry)
- Countries: United States (US)
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^[1-9]\d{4}$
```

## Examples

- `44201` — Ozone; AQS parameter code table
- `88101` — PM2.5 - Local Conditions; AQS parameter code table
- `42401` — Sulfur dioxide; AQS parameter code table
- `4420` (invalid example) — Four digits; parameter codes have five

## Translations

- ru: Код параметра AQS EPA США: Пятизначный код измеряемого параметра (загрязняющего вещества или метеовеличины) в системе AQS, например 44201 — озон, 88101 — PM2.5.

## Sources

- doc: <https://aqs.epa.gov/aqsweb/documents/codetables/parameters.html>
- doc: <https://www.epa.gov/aqs/aqs-code-list>

## Quality

Score 80/100. Missing: mapping (Wikidata, Schema.org, ...), detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/us_aqs_parameter_code.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/US/environment/us_aqs_parameter_code.yaml>