40 CFR § 258.26 - Run-on/run-off control systems.

---
identifier: "/us/cfr/t40/s258.26"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 258.26 - Run-on/run-off control systems."
title_number: 40
title_name: "Protection of Environment"
section_number: "258.26"
section_name: "Run-on/run-off control systems."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "258"
part_name: "CRITERIA FOR MUNICIPAL SOLID WASTE LANDFILLS"
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. 1345(d) and (e); 42 U.S.C. 6902(a), 6907, 6912(a), 6944, 6945(c) and 6949a(c), 6981(a)."
regulatory_source: "56 FR 51016, Oct. 9, 1991, unless otherwise noted."
cfr_part: "258"
---


# 258.26 Run-on/run-off control systems.

(a) Owners or operators of all MSWLF units must design, construct, and maintain:

(1) A run-on control system to prevent flow onto the active portion of the landfill during the peak discharge from a 25-year storm;

(2) A run-off control system from the active portion of the landfill to collect and control at least the water volume resulting from a 24-hour, 25-year storm.

(b) Run-off from the active portion of the landfill unit must be handled in accordance with § 258.27(a) of this part.

[56 FR 51016, Oct. 9, 1991; 57 FR 28627, June 26, 1992]