ECHO CWA Parameter Lookup Service

https://epa.gov/rest_lookups.cwa_parameters

Look up Clean Water Act parameter codes and descriptions in the Integrated Compliance Information System - National Pollutant Discharge Elimination System (ICIS-NPDES) by code or term.

Access Token Required: API Key

Query Params

outputstring

Output Format Flag. Enter one of the following keywords: - JSON = Data model formatted as Javascript Object Notation (default). - JSONP = Data model formatted as Javascript Object Notation with Padding. - XML = Data model formatted as Extensible Markup Language.

Responses

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}

Language

CredentialsAPI KEY

API Key

Enter token below to save for later

cURL Request

1curl --request GET \
2     --url 'https://epa.gov/rest_lookups.cwa_parameters' \
3     --header 'accept: application/json' \
4     --header 'content-type: application/json'

Response

1{
2  "success": true,
3  "data": {
4    "id": "abc123",
5    "created_at": "2025-01-01T00:00:00Z"
6  }
7}

GET