Clean Water Act discharge permit · NPDES WA0030597
SKAGIT COUNTY SEWER DIST 2 BIG LAKE WWTP, Mount Vernon, WA: NPDES WA0030597 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
SKAGIT COUNTY SEWER DIST 2 BIG LAKE WWTP, held by Skagit County Sewer District No. 2, holds NPDES permit WA0030597. EPA’s file records it issued January 29, 2021 and expiring February 28, 2026. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SKAGIT COUNTY SEWER DIST 2 BIG LAKE WWTP |
|---|---|
| Permittee as filed | Skagit County Sewer District No. 2 |
| NPDES ID | WA0030597 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 29, 2021 |
| Expiration date | February 28, 2026 |
| Issuing agency | State |
| Address | Mount Vernon, WA 98274 |
| Subwatershed | Skagit River (HUC 171100070203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 0Under a numeric limit
- 18With a violation of any kind
- 1With an effluent exceedance
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 measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH, minimum | 0 | 1 | 1 | March 31, 2013 | |
| Solids, total suspended | 0 | 568 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 468 | 0 | ||
| pH | 0 | 138 | 0 | ||
| Ultraviolet light intensity | 0 | 138 | 0 | ||
| Chlorine, total residual | 0 | 138 | 0 | ||
| Coliform, fecal general | 0 | 138 | 0 | ||
| Flow | 0 | 138 | 0 | ||
| Temperature, water deg. centigrade | 0 | 44 | 0 | ||
| BOD, percent removal [total] | 0 | 44 | 0 | ||
| Solids, suspended percent removal | 0 | 44 | 0 | ||
| Nitrogen, total [as N] | 0 | 28 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 13 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 13 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 13 | 0 | ||
| Phosphorus, total [as P] | 0 | 13 | 0 | ||
| Phosphorus, dissolved reactive [drp as P] | 0 | 13 | 0 | ||
| E. coli | 0 | 2 | 0 |
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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0030597.
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, WA0030597.
Start the watch
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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 WA0030597 there.
Nearby on the register
- Discharge permits in Mount Vernon
- Every permit record in Mount Vernon, A to Z
- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.