EPA v. Cinco Southwest MUD 1 Administrative Order

Case summary

On December 17, 2025, EPA Region 6 issued an Administrative Order (AO) under its authority pursuant to Section 309 of the Clean Water Act to Cinco Southwest MUD No. 1 WWTF. The AO was issued in response to effluent violations of permit limits. The AO requires the facility to; 1.) submit a list of specific actions taken to correct the violations and 2.) submit written certification to EPA that the violations have been corrected and the facility is compliant with its permit. The Respondent must respond to EPA Region 6 within thirty (30) days of the effective dated of the AO.

Defendants (1)

• Mr. Robert B. Duncan, PresidentNamed in complaintNamed in settlement

Facilities (1)

• CINCO SOUTHWEST WWTP

  9417 0.5 S FRY RD, KATY, TX, 77494

  Registry ID: 110012293829

Statutes cited

• CWA 301/402 — NPDES Permit Violations

Enforcement conclusions (1)

• Cinco Southwest MUD 1 Administrative Orderentered 2025-12-17

  Primary law: CWA

Timeline (2 milestones)

• 2025-12-17Final Order Issued
• 2025-12-22Enforcement Action Data Entered