Clean Water Act discharge permit · NPDES MN0054593
BLUEFIN BAY ON LAKE SUPERIOR WWTP, Tofte, MN: NPDES MN0054593 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
BLUEFIN BAY ON LAKE SUPERIOR WWTP, held by Tofte Wastewater Treatment Association Inc, holds NPDES permit MN0054593. EPA’s file records it issued January 1, 2025 and expiring February 28, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | BLUEFIN BAY ON LAKE SUPERIOR WWTP |
|---|---|
| Permittee as filed | Tofte Wastewater Treatment Association Inc |
| NPDES ID | MN0054593 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 1, 2025 |
| Expiration date | February 28, 2029 |
| Issuing agency | STA |
| Address | Tofte, MN 55615 |
| Subwatershed | City of Tofte-Frontal Lake Superior (HUC 040101010707) |
| Other EPA IDs (FRS) | RCRA handler MNS000123042 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 15Under a numeric limit
- 5With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 1 | 6 | 6 | August 31, 2025 | 435% over the limit |
| Solids, total suspended | 8 | 4 | 4 | August 31, 2025 | 37% over the limit |
| Mercury, total [as Hg] | 3 | 4 | 4 | May 31, 2025 | 94% over the limit |
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 3 | 3 | February 28, 2025 | 1,110% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 1 | April 30, 2020 | 39% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 0 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 2 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 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 MN0054593.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
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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- One watershed — $2,990/year
- One state — $4,990/year
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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 MN0054593 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.