NPDES IA0022144 · Clean Water Act
IOWA ARMY AMMUNITION PLANT, Middletown, IA: NPDES IA0022144 discharge permit, effluent exceedances, inspections, penalties
IOWA ARMY AMMUNITION PLANT, Middletown, Iowa: Individual permit IA0022144, held by US DEPT OF THE ARMY; Effective; issued February 1, 2026, term to January 31, 2031, by STA; Small Arms, Ordnance, and Ordnance Accessories Manufacturing.
7 of the 26 pollutants listed for NPDES IA0022144 have no violation or effluent exceedance.
- Chloride [as Cl]: 4 limits, 47 violations of any kind, 35 effluent exceedances, latest February 28, 2026, largest 2,260% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 49 violations of any kind, 33 effluent exceedances, latest April 30, 2008, largest 123% over the limit.
- Sulfate, total [as SO4]: 0 limits, 32 violations of any kind, 20 effluent exceedances, latest January 31, 2023, largest 364% over the limit.
- Silver, total [as Ag]: 4 limits, 34 violations of any kind, 18 effluent exceedances, latest March 31, 2025, largest 11,011% over the limit.
- Nickel, total [as Ni]: 4 limits, 29 violations of any kind, 17 effluent exceedances, latest January 31, 2023, largest 849% over the limit.
- Solids, total suspended: 26 limits, 81 violations of any kind, 16 effluent exceedances, latest April 30, 2023, largest 216% over the limit.
- E. coli: 1 limit, 14 violations of any kind, 12 effluent exceedances, latest July 31, 2026, largest 5,878% over the limit.
- Aluminum, total [as Al]: 4 limits, 15 violations of any kind, 11 effluent exceedances, latest July 31, 2024, largest 1,647% over the limit.
- pH: 15 limits, 49 violations of any kind, 10 effluent exceedances, latest November 30, 2012.
- Nitrogen, ammonia total [as N]: 96 limits, 23 violations of any kind, 7 effluent exceedances, latest December 31, 2025, largest 802% over the limit.
- Trinitrotoluene [TNT], total: 16 limits, 73 violations of any kind, 5 effluent exceedances, latest September 30, 2013, largest 4,833% over the limit.
- Oil & Grease: 17 limits, 9 violations of any kind, 5 effluent exceedances, latest November 30, 2022, largest 160% over the limit.
- RDX+HMX: 16 limits, 69 violations of any kind, 1 effluent exceedance, latest September 30, 2013, largest 39% over the limit.
- Toxicity [acute], Ceriodaphnia dubia: 1 limit, 6 violations of any kind, 1 effluent exceedance, latest September 30, 2014, largest 100% over the limit.
- Nitrotriazolone [NTO]: 16 limits, 20 violations of any kind.
- 2,4-Dinitroanisole: 16 limits, 16 violations of any kind.
- Nitroguanidine: 16 limits, 16 violations of any kind.
- Iron, total [as Fe]: 4 limits, 8 violations of any kind.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 5 violations of any kind.
- Nitrogen, total [as N]: 10 limits.
- Phosphorus, total [as P]: 10 limits.
- Chlorine, total residual: 8 limits.
- BOD, 5-day, 20 deg. C: 5 limits.
- Cadmium, total [as Cd]: 4 limits.
- Selenium, total [as Se]: 4 limits.
- Oxygen, dissolved [DO]: 1 limit.
Other permits held by US DEPT OF THE ARMY
- US DEPT OF THE ARMY, Middletown: IAL022144, issued 2021-01-01
IOWA ARMY AMMUNITION PLANT among its neighbors
2 discharge permits are in the Spring Creek subwatershed (HUC 070801041503); IA0022144 is one. Its county: 17, 4 major; IA0022144 is major permit.
Other permits in the Spring Creek subwatershed (HUC 070801041503)
- BIG RIVER RESOURCES WEST BURLINGTON, LLC, West Burlington: IA0078123, minor, term to 2025-01-31
Identity
| Facility | IOWA ARMY AMMUNITION PLANT |
|---|---|
| Permittee | US DEPT OF THE ARMY |
| NPDES ID | IA0022144 |
| Status | Effective |
| Type | Individual permit |
| Class | Major |
| Facility type | Federal facility |
| Issued | February 1, 2026 |
| Expires | January 31, 2031 |
| Agency | STA |
| Address | Middletown, IA 52638 |
| Subwatershed | Spring Creek (HUC 070801041503) |
| NAICS | 332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing |
| SIC | 3489 – Ordnance And Accessories |
| Other EPA IDs (FRS) | RCRA handler IA7213820445; ICIS-AIR source IA0000001905700020 |
NPDES IA0022144: effluent limits and exceedances
IOWA ARMY AMMUNITION PLANT (NPDES IA0022144): 26 pollutants on file, 25 limited; 19 with a violation of any kind, 14 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Chloride [as Cl] | 4 | 47 | 35 | February 28, 2026 | 2,260% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 49 | 33 | April 30, 2008 | 123% over the limit |
| Sulfate, total [as SO4] | 0 | 32 | 20 | January 31, 2023 | 364% over the limit |
| Silver, total [as Ag] | 4 | 34 | 18 | March 31, 2025 | 11,011% over the limit |
| Nickel, total [as Ni] | 4 | 29 | 17 | January 31, 2023 | 849% over the limit |
| Solids, total suspended | 26 | 81 | 16 | April 30, 2023 | 216% over the limit |
| E. coli | 1 | 14 | 12 | July 31, 2026 | 5,878% over the limit |
| Aluminum, total [as Al] | 4 | 15 | 11 | July 31, 2024 | 1,647% over the limit |
| pH | 15 | 49 | 10 | November 30, 2012 | |
| Nitrogen, ammonia total [as N] | 96 | 23 | 7 | December 31, 2025 | 802% over the limit |
| Trinitrotoluene [TNT], total | 16 | 73 | 5 | September 30, 2013 | 4,833% over the limit |
| Oil & Grease | 17 | 9 | 5 | November 30, 2022 | 160% over the limit |
| RDX+HMX | 16 | 69 | 1 | September 30, 2013 | 39% over the limit |
| Toxicity [acute], Ceriodaphnia dubia | 1 | 6 | 1 | September 30, 2014 | 100% over the limit |
| Nitrotriazolone [NTO] | 16 | 20 | 0 | ||
| 2,4-Dinitroanisole | 16 | 16 | 0 | ||
| Nitroguanidine | 16 | 16 | 0 | ||
| Iron, total [as Fe] | 4 | 8 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 5 | 0 | ||
| Nitrogen, total [as N] | 10 | 0 | 0 | ||
| Phosphorus, total [as P] | 10 | 0 | 0 | ||
| Chlorine, total residual | 8 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Cadmium, total [as Cd] | 4 | 0 | 0 | ||
| Selenium, total [as Se] | 4 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 |
NPDES IA0022144: inspections, violations and enforcement
NPDES IA0022144 (IOWA ARMY AMMUNITION PLANT): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES IA0022144
NPDES IA0022144: one email when its EPA record changes — $99/month.
Permits near NPDES IA0022144
NPDES IA0022144: 26 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.