Clean Water Act discharge permit · NPDES WA0501487
ROCK ISLAND POTW, Rock Island, WA: NPDES WA0501487 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
ROCK ISLAND POTW, held by City of Rock Island, holds NPDES permit WA0501487. EPA’s file records it issued January 13, 2020 and expiring February 28, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ROCK ISLAND POTW |
|---|---|
| Permittee as filed | City of Rock Island |
| NPDES ID | WA0501487 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 13, 2020 |
| Expiration date | February 28, 2025 |
| Issuing agency | State |
| Address | Rock Island, WA 98850 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Hammond Lake-Columbia River (HUC 170200100313) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 16Under a numeric limit
- 19With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 10 | 354 | 2 | June 30, 2023 | 4,077% over the limit |
| Solids, total suspended | 10 | 353 | 1 | June 30, 2021 | 16% over the limit |
| Flow | 6 | 327 | 0 | ||
| Temperature, water deg. centigrade | 2 | 114 | 0 | ||
| pH | 2 | 114 | 0 | ||
| Coliform, fecal general | 2 | 114 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 108 | 0 | ||
| BOD, percent removal [total] | 1 | 34 | 0 | ||
| Solids, suspended percent removal | 1 | 34 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Oil and grease, hexane extr method | 1 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 3 | 0 | ||
| Phosphorus, total [as P] | 1 | 3 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 0 | ||
| Phosphate, total [as PO4] | 0 | 2 | 0 | ||
| Arsenic, total [as As] | 2 | 1 | 0 | ||
| Solids, total dissolved | 1 | 1 | 0 | ||
| E. coli | 0 | 1 | 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 WA0501487.
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
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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 WA0501487 there.
Nearby on the register
- Discharge permits in Rock Island
- Every permit record in Rock Island, A to Z
- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.