Clean Water Act discharge permit · NPDES SD0000264
NORTHERN STATES POWER - ANGUS ANSON GENERATING PLANT, Sioux Falls, SD: NPDES SD0000264 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
NORTHERN STATES POWER - ANGUS ANSON GENERATING PLANT, held by NORTHERN STATES POWER-PATHFIND, holds NPDES permit SD0000264, which discharges to Big Sioux River. EPA’s file records it issued July 13, 2004 and expiring July 13, 2009. 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 | NORTHERN STATES POWER - ANGUS ANSON GENERATING PLANT |
|---|---|
| Permittee as filed | NORTHERN STATES POWER-PATHFIND |
| NPDES ID | SD0000264 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 13, 2004 |
| Expiration date | July 13, 2009 |
| Issuing agency | SDDENR |
| Address | Sioux Falls, SD 57110 |
| Receiving water | BIG SIOUX RIVER |
| Subwatershed | Cactus Hills-Big Sioux River (HUC 101702031705) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 16Under a numeric limit
- 2With 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 |
|---|---|---|---|---|---|
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 1 | 1 | 0 | ||
| Flow rate | 4 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 0 | 0 | ||
| Solids, total dissolved | 2 | 0 | 0 | ||
| Conductivity | 1 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Solids, total suspended | 1 | 0 | 0 | ||
| Floating solids, waste or visible foam-visual | 1 | 0 | 0 | ||
| Sanitary waste discharged-assessmnt | 1 | 0 | 0 | ||
| Chlorine, total residual | 1 | 0 | 0 | ||
| Duration of discharge | 1 | 0 | 0 | ||
| Hydrocarbons, petroleum | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SD0000264.
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 SD0000264.
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 SD0000264 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.