Clean Water Act discharge permit · NPDES MN0022977
BUTTERFIELD WWTP, Butterfield, MN: NPDES MN0022977 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 26Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
BUTTERFIELD WWTP, held by Butterfield city of, holds NPDES permit MN0022977. EPA’s file records it issued May 1, 2019 and expiring March 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | BUTTERFIELD WWTP |
|---|---|
| Permittee as filed | Butterfield city of |
| NPDES ID | MN0022977 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 1, 2019 |
| Expiration date | March 31, 2024 |
| Issuing agency | STA |
| Address | Butterfield, MN 56120 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Upper Butterfield Creek (HUC 070200100301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 26Pollutants on file
- 26Under a numeric limit
- 26With a violation of any kind
- 1With 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 | 7 | 11 | 1 | July 31, 2024 | |
| Solids, total suspended | 6 | 11 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 5 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 9 | 9 | 0 | ||
| Phosphorus, total [as P] | 4 | 8 | 0 | ||
| Nitrogen, total [as N] | 2 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 5 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 5 | 0 | ||
| Temperature, water deg. centigrade | 3 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 4 | 0 | ||
| Specific conductance | 1 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Bicarbonate ion- [as HCO3] | 1 | 2 | 0 | ||
| Calcium, total [as Ca] | 1 | 2 | 0 | ||
| Magnesium, total [as Mg] | 1 | 2 | 0 | ||
| Sodium, total [as Na] | 1 | 2 | 0 | ||
| Potassium, total [as K] | 1 | 2 | 0 | ||
| Chloride [as Cl] | 1 | 2 | 0 | ||
| Sulfate, total [as SO4] | 1 | 2 | 0 | ||
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | 1 | 2 | 0 | ||
| Solids, total dissolved | 1 | 2 | 0 | ||
| Stream flow, instantaneous | 1 | 1 | 0 | ||
| Precipitation, total defined period/in | 1 | 1 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 1 | 0 | ||
| Mercury, dissolved [as Hg] | 1 | 1 | 0 | ||
| Mercury, total [as Hg] | 1 | 1 | 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 MN0022977.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MN0022977.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MN0022977 there.
Nearby on the register
- Discharge permits in Butterfield
- Every permit record in Butterfield, A to Z
- Discharge permits in Minnesota
- Every permit record in Minnesota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.