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Clean Water Act discharge permit · NPDES WAR313610

TWIN TRAILS, Federal Way, WA: NPDES WAR313610 discharge permit, effluent exceedances, inspections, penalties

TWIN TRAILS, held by Washington Stormwater LLC, holds NPDES permit WAR313610. EPA’s file records it issued November 18, 2020 and expiring December 31, 2025.

TWIN TRAILS, Federal Way, Washington: Coverage under a general permit WAR313610, held by Washington Stormwater LLC; Construction stormwater; Administratively continued (past its expiration date and still in force until reissued); issued November 18, 2020, term to December 31, 2025, by State.

  • pH: 2 limits, 46 violations of any kind, 0 effluent exceedances.
  • Turbidity: 1 limit, 23 violations of any kind, 0 effluent exceedances.
  • August 10, 2026: Evaluation (S).

Washington holds 4,744 Construction stormwater coverages of this permit type in EPA’s file; 1,658 were issued before WAR313610. Washington Stormwater LLC holds 10 permits in Washington.

Other permits held by Washington Stormwater LLC

Coverages issued nearest WAR313610

TWIN TRAILS among its neighbors

EPA’s permit file holds 99 discharge permits in the Puget Sound subwatershed (HUC 171100191200), WAR313610 among them. Its county holds 1,319, 8 of them major permits; WAR313610 is a minor permit.

Other permits in the Puget Sound subwatershed (HUC 171100191200)

Identity

Facility as filedTWIN TRAILS
Permittee as filedWashington Stormwater LLC
NPDES IDWAR313610
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedNovember 18, 2020
Expiration dateDecember 31, 2025
Issuing agencyState
AddressFederal Way, WA 98023
SubwatershedPuget Sound (HUC 171100191200)

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
pH2460
Turbidity1230

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES WAR313610.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WAR313610.

Inspections

DateWhat EPA recordedAgency
August 10, 2026EvaluationS

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES WAR313610.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES WAR313610 for TWIN TRAILS in Federal Way, WA, held by Washington Stormwater LLC, a minor discharger under a construction stormwater program with an administratively continued status. The page lists 2 pollutants on file, both under a numeric limit, with 0 pollutants showing an effluent exceedance, in the Puget Sound watershed (HUC 171100191200).