---
title: "One US NPDES permit from EPA's national file"
method: GET
path: "/permits/{permit}"
---

# One US NPDES permit from EPA's national file

`GET /permits/{permit}`

## Request

- Base URL: `https://passage-data.com/api/v1`
- URL: `https://passage-data.com/api/v1/permits/{permit}`
- Auth: one of:
  - none
  - HTTP bearer
  - API key in header `x-api-key`

## Path parameters

- `permit` string, required

## Response `200`

Limits by outfall, renewal due date, the last 12 months' values over a limit

- object

## Other responses

- `400`: permit.malformed
- `404`: permit.not_held

---

[API](https://skmtc.dev/passage-data/apis/passage-data-cited-environmental-limits.md) · [All operations](https://skmtc.dev/passage-data/apis/passage-data-cited-environmental-limits/llms.txt) · [OpenAPI document](https://skmtc.dev/passage-data/apis/passage-data-cited-environmental-limits/revisions/ba066708bf53?raw)