Clean Water Act discharge permit · NPDES IA0033057
ROCK VALLEY CITY OF STP, Rock Valley, IA: NPDES IA0033057 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
ROCK VALLEY CITY OF STP, held by CITY OF ROCK VALLEY, holds NPDES permit IA0033057. EPA’s file records it issued October 1, 2022 and expiring September 30, 2027. 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 | ROCK VALLEY CITY OF STP |
|---|---|
| Permittee as filed | CITY OF ROCK VALLEY |
| NPDES ID | IA0033057 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 1, 2022 |
| Expiration date | September 30, 2027 |
| Issuing agency | STA |
| Address | Rock Valley, IA 51247 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rogg Creek-Rock River (HUC 101702040804) |
| NAICS | 221320 – Sewage Treatment Facilities |
| 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
- 11Pollutants on file
- 10Under a numeric limit
- 6With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 48 | 207 | 199 | June 30, 2026 | 1,151% over the limit |
| Solids, total suspended | 9 | 47 | 18 | June 30, 2026 | 4,044% over the limit |
| pH | 5 | 15 | 5 | August 31, 2013 | |
| BOD, carbonaceous [5 day, 20 C] | 4 | 35 | 4 | June 30, 2026 | 1,147% over the limit |
| E. coli | 1 | 1 | 1 | October 31, 2024 | 182% over the limit |
| Oxygen, dissolved [DO] | 0 | 6 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Nitrogen, total [as N] | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| Phosphorus, total [as P] | 5 | 0 | 0 | ||
| Report due [yrmoda] | 2 | 0 | 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 IA0033057.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0033057.
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 IA0033057.
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, IA0033057.
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 IA0033057 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.