Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES WA0029513

DUVALL STP, Duvall, WA: NPDES WA0029513 discharge permit, effluent exceedances, inspections, penalties

DUVALL STP, held by City of Duvall, holds NPDES permit WA0029513. EPA’s file records it issued January 18, 2018 and expiring February 28, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedDUVALL STP
Permittee as filedCity of Duvall
NPDES IDWA0029513
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedJanuary 18, 2018
Expiration dateFebruary 28, 2023
Issuing agencyState
AddressDuvall, WA 98019
SubwatershedRicci Creek-Snoqualmie River (HUC 171100100603)
Program components on filePOTW, Pretreatment
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

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
BOD, 5-day, 20 deg. C0162October 31, 200975% over the limit
Solids, total suspended0560
BOD, carbonaceous [5 day, 20 C]0560
Temperature, water deg. centigrade0140
pH0140
Coliform, fecal general0140
Flow0140
Nitrogen, ammonia total [as N]090

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0029513.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, WA0029513.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID WA0029513 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers the NPDES discharge permit WA0029513 for the DUVALL STP in Duvall, WA, held by City of Duvall, with permit status Effective and a Minor discharger class. The filed figures show 8 pollutants on file, 0 under a numeric limit, 8 with a violation of any kind, and 1 with an effluent exceedance, with the permit issued January 18, 2018 and expiring February 28, 2023.