Clean Water Act discharge permit · NPDES MO0122581
IRON MOUNTAIN LAKE WWTF, Iron Mountain, MO: NPDES MO0122581 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
IRON MOUNTAIN LAKE WWTF, held by Iron Mountain Lake, City of, holds NPDES permit MO0122581, which discharges to Indian Cr.. EPA’s file records it issued May 17, 2018 and expiring March 31, 2022.
IRON MOUNTAIN LAKE WWTF, Iron Mountain, Missouri: Individual permit MO0122581, held by Iron Mountain Lake, City of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued May 17, 2018, term to March 31, 2022; discharges to Indian Cr..
- Nitrogen, ammonia total [as N]: 4 limits, 236 violations of any kind, 220 effluent exceedances, latest July 31, 2026, largest 793% over the limit.
- E. coli: 2 limits, 80 violations of any kind, 58 effluent exceedances, latest July 31, 2026, largest 137,202% over the limit.
- BOD, 5-day, 20 deg. C: 2 limits, 79 violations of any kind, 56 effluent exceedances, latest February 28, 2026, largest 380% over the limit.
- BOD, 5-day, percent removal: 1 limit, 29 violations of any kind, 26 effluent exceedances, latest March 31, 2026, largest 460% over the limit.
- Solids, total suspended: 2 limits, 35 violations of any kind, 12 effluent exceedances, latest November 30, 2024, largest 120% over the limit.
- Solids, suspended percent removal: 1 limit, 11 violations of any kind, 8 effluent exceedances, latest May 31, 2025, largest 133% over the limit.
- pH: 2 limits, 20 violations of any kind, 2 effluent exceedances, latest August 31, 2019.
- Flow, in conduit or thru treatment plant: 2 limits, 18 violations of any kind, 0 effluent exceedances.
- Oil and grease [soxhlet extr.] tot.: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Coliform, fecal general: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
Missouri holds 756 Publicly owned treatment works coverages of this permit type in EPA’s file; 376 were issued before MO0122581.
Coverages issued nearest MO0122581
- May 16, 2018: MAWC, EUREKA WWTF, Eureka, MO0039659, held by City of Eureka
- May 16, 2018: MAWC, PURCELL WWTF, Purcell, MO0129755, held by City of Purcell
- May 16, 2018: WHITEWATER-ALLENVILLE WWTF, Allenville, MO0136174, held by WhitewaterAllenville Combined Water Coop
- May 17, 2018: CORDER NORTH WWTF, Corder, MO0022926, held by City of Corder
- May 17, 2018: CORDER SOUTH WWTF, Corder, MO0022934, held by City of Corder
- May 21, 2018: NORWOOD WWTP, Norwood, MO0103365, held by City of Norwood
- May 22, 2018: CALEDONIA WWTF, Caledonia, MO0128571, held by Village of Caledonia
- May 22, 2018: CROSS TIMBERS WWTF, Cross Timbers, MO0135674, held by City of Cross Timbers
- May 23, 2018: KINGSVILLE WWTF, Kingsville, MO0025844, held by City of Kingsville
- May 24, 2018: SYLVAN MANOR-SUNSET ACRES WWTP, Pacific, MO0098043, held by Sylvan Manor-Sunset Acres Sewer District
IRON MOUNTAIN LAKE WWTF among its neighbors
EPA’s permit file holds 6 discharge permits in the Headwaters St Francis River subwatershed (HUC 080202020201), MO0122581 among them. Its county holds 116, 2 of them major permits; MO0122581 is a minor permit.
Other permits in the Headwaters St Francis River subwatershed (HUC 080202020201)
- MISSOURI RED QUARRIES, INC, Ironton: MOG490926, minor permit, discharging to Tributary to Saint Francis River, permit term to April 30, 2022
- NEW FRONTIER MATERIALS - IRON MOUNTAIN, Iron Mountain: MOG490401, minor permit, discharging to Tributary to Saint Francis River, permit term to April 30, 2027
- STRICKLIN WWTF, Ironton: MO0122319, minor permit, discharging to Tributary to Middlebrook Creek, permit term to March 31, 2022
- TRAP ROCK AND GRANITE QUARRIES, LLC, Ironton: MOG490897, minor permit, discharging to Tributary to First Creek, permit term to April 30, 2022
- US GRANULES, Ironton: MORA20143, minor permit, discharging to Tributary to First Creek, permit term to February 7, 2027
Identity
| Facility as filed | IRON MOUNTAIN LAKE WWTF |
|---|---|
| Permittee as filed | Iron Mountain Lake, City of |
| NPDES ID | MO0122581 |
| 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 | May 17, 2018 |
| Expiration date | March 31, 2022 |
| Address | Iron Mountain, MO 63624 |
| Receiving water | Indian Cr. |
| Subwatershed | Headwaters St Francis River (HUC 080202020201) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 12Pollutants on file
- 11Under a numeric limit
- 12With a violation of any kind
- 7With 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] | 4 | 236 | 220 | July 31, 2026 | 793% over the limit |
| E. coli | 2 | 80 | 58 | July 31, 2026 | 137,202% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 79 | 56 | February 28, 2026 | 380% over the limit |
| BOD, 5-day, percent removal | 1 | 29 | 26 | March 31, 2026 | 460% over the limit |
| Solids, total suspended | 2 | 35 | 12 | November 30, 2024 | 120% over the limit |
| Solids, suspended percent removal | 1 | 11 | 8 | May 31, 2025 | 133% over the limit |
| pH | 2 | 20 | 2 | August 31, 2019 | |
| Flow, in conduit or thru treatment plant | 2 | 18 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 2 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 1 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0122581.
Inspections
EPA’s inspection file holds no inspection for NPDES MO0122581.
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 MO0122581.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.