Clean Water Act discharge permit · NPDES WA0029670
SEATTLE CITY LIGHT NEWHALEM WWTP, Newhalem, WA: NPDES WA0029670 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
SEATTLE CITY LIGHT NEWHALEM WWTP, held by Seattle City Light, holds NPDES permit WA0029670. EPA’s file records it issued June 8, 2018 and expiring June 30, 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 filed | SEATTLE CITY LIGHT NEWHALEM WWTP |
|---|---|
| Permittee as filed | Seattle City Light |
| NPDES ID | WA0029670 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 8, 2018 |
| Expiration date | June 30, 2023 |
| Issuing agency | State |
| Address | Newhalem, WA 98283 |
| Subwatershed | Ladder Creek-Skagit River (HUC 171100050408) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – 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
- 7Pollutants on file
- 0Under a numeric limit
- 7With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 0 | 74 | 2 | June 30, 2026 | 300% over the limit |
| Coliform, fecal general | 0 | 20 | 2 | July 31, 2019 | 99,999% over the limit |
| Solids, suspended percent removal | 0 | 1 | 1 | June 30, 2026 | 440% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 72 | 0 | ||
| Temperature, water deg. centigrade | 0 | 21 | 0 | ||
| Chlorine, total residual | 0 | 21 | 0 | ||
| pH | 0 | 18 | 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 WA0029670.
Inspections
EPA’s inspection file holds no inspection for NPDES WA0029670.
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 WA0029670.
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, WA0029670.
Start the watch
- 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 WA0029670 there.
Nearby on the register
- Discharge permits in Newhalem
- Every permit record in Newhalem, A to Z
- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.