Clean Water Act discharge permit · NPDES SDG589203
FORT THOMPSON LAGOON SYSTEM, Fort Thompson, SD: NPDES SDG589203 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
FORT THOMPSON LAGOON SYSTEM, held by Fort Thompson Lagoon, holds NPDES permit SDG589203. EPA’s file records it issued April 5, 2016 and expiring December 31, 2020. 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 | FORT THOMPSON LAGOON SYSTEM |
|---|---|
| Permittee as filed | Fort Thompson Lagoon |
| NPDES ID | SDG589203 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 5, 2016 |
| Expiration date | December 31, 2020 |
| Issuing agency | U.S. EPA Region 8 |
| Address | Fort Thompson, SD 57339 |
| Subwatershed | Soldier Creek (HUC 101401010601) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 10Under a numeric limit
- 13With 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 | 2 | 63 | 1 | December 31, 2007 | |
| BOD, 5-day, 20 deg. C | 2 | 62 | 0 | ||
| Solids, total suspended | 2 | 62 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 54 | 0 | ||
| Oil and grease visual | 1 | 32 | 0 | ||
| Oil & Grease | 1 | 31 | 0 | ||
| Duration of discharge | 0 | 16 | 0 | ||
| Floating solids, waste or visible foam-visual | 0 | 12 | 0 | ||
| Temperature, water deg. centigrade | 2 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 8 | 0 | ||
| Flow, total | 2 | 8 | 0 | ||
| Nitrogen, total [as N] | 1 | 4 | 0 | ||
| Phosphorus, total [as P] | 1 | 4 | 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 SDG589203.
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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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 SDG589203 there.
Nearby on the register
- Discharge permits in Fort Thompson
- Every permit record in Fort Thompson, A to Z
- Discharge permits in South Dakota
- Every permit record in South Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.