Clean Water Act discharge permit · NPDES MNG490250
PENTAGON MATERIALS INC, Prior Lake, MN: NPDES MNG490250 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
PENTAGON MATERIALS INC, held by Pentagon Meterials Inc, holds NPDES permit MNG490250. EPA’s file records it issued July 1, 2023 and expiring May 31, 2027.
PENTAGON MATERIALS INC, Prior Lake, Minnesota: Coverage under a general permit MNG490250, held by Pentagon Meterials Inc; Effective; issued July 1, 2023, term to May 31, 2027, by STA.
- pH: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 3 limits, 2 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [as N]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Nitrite + Nitrate total [as N]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
PENTAGON MATERIALS INC among its neighbors
EPA’s permit file holds 3 discharge permits in the Buffalo Lake subwatershed (HUC 070200110603), MNG490250 among them. Its county holds 18, 1 of them major permits; MNG490250 is a minor permit.
Other permits in the Buffalo Lake subwatershed (HUC 070200110603)
- JANESVILLE, Janesville: MNG580025, minor permit, discharging to LESUEUR R VIA CD 6, permit term to February 28, 2010
- JANESVILLE WWTP, Janesville: MNG585025, minor permit, permit term to November 30, 2023
Identity
| Facility as filed | PENTAGON MATERIALS INC |
|---|---|
| Permittee as filed | Pentagon Meterials Inc |
| NPDES ID | MNG490250 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 1, 2023 |
| Expiration date | May 31, 2027 |
| Issuing agency | STA |
| Address | Prior Lake, MN 55372 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Buffalo Lake (HUC 070200110603) |
| SIC | 1422 – Crushed And Broken Limestone |
Effluent limits and exceedances
- 6Pollutants on file
- 6Under a numeric limit
- 4With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| pH | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Solids, total suspended | 3 | 2 | 0 | ||
| Phosphorus, total [as P] | 1 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MNG490250.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MNG490250.
Inspections
EPA’s inspection file holds no inspection for NPDES MNG490250.
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 MNG490250.
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- Discharge permits in Prior Lake
- Every permit record in Prior Lake, A to Z
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.