40 CFR § 435.46 - Pretreatment standards of performance for existing sources (PSES).

---
identifier: "/us/cfr/t40/s435.46"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 435.46 - Pretreatment standards of performance for existing sources (PSES)."
title_number: 40
title_name: "Protection of Environment"
section_number: "435.46"
section_name: "Pretreatment standards of performance for existing sources (PSES)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "435"
part_name: "OIL AND GAS EXTRACTION POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1251, 1311, 1314, 1316, 1317, 1318, 1342 and 1361."
regulatory_source: "44 FR 22075, Apr. 13, 1979, unless otherwise noted."
cfr_part: "435"
---


# 435.46 Pretreatment standards of performance for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source with discharges subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources (PSES).

PSES Effluent Limitations

| Stream | Pollutant parameter | PSES effluent limitations |
| --- | --- | --- |
| Produced Water |  | No discharge. |
| Drilling Fluids and Drill Cuttings Well Treatment |  |  |
| Workover and Completion Fluids |  | No discharge. |
| Produced Sand |  | No discharge. |
| Deck Drainage |  | No discharge. |