Clean Water Act discharge permit · NPDES SD0028011
CLAY RURAL WATER SYSTEM - WYNSTONE, North Sioux City, SD: NPDES SD0028011 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 17Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CLAY RURAL WATER SYSTEM - WYNSTONE, held by Clay Rural Water System - Wynstone, holds NPDES permit SD0028011, which discharges to Missouri River. EPA’s file records it issued March 25, 2013 and expiring March 31, 2018. 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 | CLAY RURAL WATER SYSTEM - WYNSTONE |
|---|---|
| Permittee as filed | Clay Rural Water System - Wynstone |
| NPDES ID | SD0028011 |
| 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 | March 25, 2013 |
| Expiration date | March 31, 2018 |
| Issuing agency | SDDANR |
| Address | North Sioux City, SD 57049 |
| Receiving water | MISSOURI RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Walnut Creek-Missouri River (HUC 101701011504) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 17Under a numeric limit
- 18With 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 |
|---|---|---|---|---|---|
| Chloride [as Cl] | 2 | 23 | 1 | December 31, 2007 | 11% over the limit |
| Temperature, water deg. centigrade | 4 | 44 | 0 | ||
| Flow rate | 4 | 44 | 0 | ||
| pH | 4 | 44 | 0 | ||
| Solids, total suspended | 4 | 33 | 0 | ||
| Conductivity | 2 | 22 | 0 | ||
| Alkalinity, total [as CaCO3] | 2 | 22 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 22 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 22 | 0 | ||
| Sulfate, total [as SO4] | 2 | 22 | 0 | ||
| Chlorine, total residual | 2 | 22 | 0 | ||
| Solids, total dissolved | 2 | 22 | 0 | ||
| Radium 226, total | 2 | 16 | 0 | ||
| Flow, total | 2 | 14 | 0 | ||
| Barium, total [as Ba] | 1 | 12 | 0 | ||
| Fluoride, total [as F] | 1 | 11 | 0 | ||
| Floating solids, waste or visible foam-visual | 1 | 11 | 0 | ||
| Duration | 0 | 11 | 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 SD0028011.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, SD0028011.
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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 SD0028011 there.
Nearby on the register
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- Every permit record in South Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.