# Deer Park Oil Refinery WWTP: major wastewater plant, DMR due for period ending 2026-09-30 (12 outfalls), Harris County, TX

**Score:** 65/100

| Field | Value |
|---|---|
| Facility | Deer Park Oil Refinery WWTP |
| Permittee | Deer Park Refining Limited Parnership |
| TPDES permit | WQ0000403000 |
| EPA ID | TX0004871 |
| Designation | Major |
| Facility type | Municipal / utility district WWTP |
| Outfalls | 001A, 002A, 003A, 004A, 006A, 007A, 008A, 009A, 010A, 107A, 108A, 207A |
| Monitoring period end | 2026-09-30 |
| County | Harris County, TX |

## Why this score
- Major discharger: more parameters and frequent sampling.
- 12 outfalls to sample.

Source: Harris County Discharge Monitoring Reports (DMR) facility list (data.texas.gov) (https://data.texas.gov/d/wcwp-yeda). Last refreshed: 2026-10-28T20:50:34.947Z.
From the Harris County DMR facility list on data.texas.gov, which lists permits with reports due for the current monitoring period; it does not show results or violations. Facility level only. Verify with TCEQ and EPA ECHO.