Clean Water Act discharge permit · NPDES IA0035955
AMES WATER POLLUTION CONTROL FACILITY, Ames, IA: NPDES IA0035955 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
AMES WATER POLLUTION CONTROL FACILITY, held by CITY OF AMES, holds NPDES permit IA0035955. EPA’s file records it issued March 1, 2022 and expiring February 28, 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 | AMES WATER POLLUTION CONTROL FACILITY |
|---|---|
| Permittee as filed | CITY OF AMES |
| NPDES ID | IA0035955 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 1, 2022 |
| Expiration date | February 28, 2027 |
| Issuing agency | STA |
| Address | Ames, IA 50010 |
| Subwatershed | Drainage Ditch 13-South Skunk River (HUC 070801050903) |
| Program components on file | Biosolids, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source IA0000001916900167 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 18Pollutants on file
- 14Under a numeric limit
- 10With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 1 | 17 | 9 | April 30, 2013 | 96% over the limit |
| Solids, suspended percent removal | 0 | 14 | 9 | July 31, 2010 | 133% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 17 | 8 | June 30, 2008 | 89% over the limit |
| Solids, total suspended | 9 | 16 | 8 | November 30, 2002 | 453% over the limit |
| BOD, carbonaceous, percent removal | 0 | 10 | 5 | April 30, 2010 | 233% over the limit |
| pH | 5 | 1 | 1 | May 31, 1997 | |
| Nitrogen, ammonia total [as N] | 48 | 101 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 31 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 48 | 23 | 0 | ||
| E. coli | 1 | 1 | 0 | ||
| Nitrogen, total [as N] | 10 | 0 | 0 | ||
| Phosphorus, total [as P] | 10 | 0 | 0 | ||
| Copper, total [as Cu] | 8 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| Cyanide, total [as CN] | 5 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 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 IA0035955.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0035955.
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 IA0035955.
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 IA0035955 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.