Clean Water Act discharge permit · NPDES SDR10P5LQ
2025 WATER SYSTEMS IMPROVEMENTS SCHEDULE 1: PIPELINE, Castlewood, SD: NPDES SDR10P5LQ discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
2025 WATER SYSTEMS IMPROVEMENTS SCHEDULE 1: PIPELINE, held by SIOUX RURAL WATER SYSTEM, INC, holds NPDES permit SDR10P5LQ. EPA’s file records it issued March 17, 2026 and expiring October 31, 2028. 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.
What the register holds for 2025 WATER SYSTEMS IMPROVEMENTS SCHEDULE 1: PIPELINE: its NPDES ID, its permit type and status, its dates, its address in Castlewood, South Dakota. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES SDR10P5LQ.
Identity
| Facility as filed | 2025 WATER SYSTEMS IMPROVEMENTS SCHEDULE 1: PIPELINE |
|---|---|
| Permittee as filed | SIOUX RURAL WATER SYSTEM, INC |
| NPDES ID | SDR10P5LQ |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Construction stormwater |
| Issued | March 17, 2026 |
| Expiration date | October 31, 2028 |
| Issuing agency | SDDANR |
| Address | Castlewood, SD 57223 |
| Subwatershed | City of Castlewood-Big Sioux River (HUC 101702010905) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES SDR10P5LQ.
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 SDR10P5LQ.
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 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 SDR10P5LQ there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.