Clean Water Act discharge permit · NPDES MN0020494
AURORA WWTP, Aurora, MN: NPDES MN0020494 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
AURORA WWTP, held by Aurora WWTP, holds NPDES permit MN0020494, which discharges to Silver Cr. EPA’s file records it issued February 25, 2011 and expiring January 31, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | AURORA WWTP |
|---|---|
| Permittee as filed | Aurora WWTP |
| NPDES ID | MN0020494 |
| 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 | February 25, 2011 |
| Expiration date | January 31, 2016 |
| Address | Aurora, MN 55705 |
| Receiving water | SILVER CR |
| Subwatershed | Twin Lakes-Saint Louis River (HUC 040102010204) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 13Pollutants on file
- 0Under a numeric limit
- 13With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 0 | 22 | 18 | April 30, 1993 | 208% over the limit |
| Phosphorus, total [as P] | 0 | 12 | 7 | October 31, 1993 | 50% over the limit |
| Coliform, fecal MPN + membrane ftl 44.5 C | 0 | 12 | 4 | September 30, 1993 | 200% over the limit |
| pH | 0 | 6 | 2 | October 31, 1990 | |
| Chlorine, total residual | 0 | 1 | 1 | September 30, 2022 | 99,999% over the limit |
| Mercury, total [as Hg] | 0 | 1 | 1 | September 30, 2023 | 66% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 61 | 0 | ||
| Solids, total suspended | 0 | 6 | 0 | ||
| Mercury, dissolved [as Hg] | 0 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 1 | 0 | ||
| Nitrogen, total [as N] | 0 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 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 MN0020494.
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, MN0020494.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/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 MN0020494 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.