Clean Water Act discharge permit · NPDES SD0021831
FLANDREAU, CITY OF, Flandreau, City Of, SD: NPDES SD0021831 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
FLANDREAU, CITY OF, held by Flandreau, City of, holds NPDES permit SD0021831, which discharges to Big Sioux River. EPA’s file records it issued July 1, 2019 and expiring June 30, 2024. 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 | FLANDREAU, CITY OF |
|---|---|
| Permittee as filed | Flandreau, City of |
| NPDES ID | SD0021831 |
| 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 | July 1, 2019 |
| Expiration date | June 30, 2024 |
| Issuing agency | SDDANR |
| Address | Flandreau, City Of, SD 57028 |
| Receiving water | Big Sioux River |
| Subwatershed | City of Flandreau-Big Sioux River (HUC 101702030602) |
| NAICS | 221320 – Sewage Treatment Facilities |
| 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
- 16Pollutants on file
- 13Under a numeric limit
- 16With a violation of any kind
- 4With 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 | 28 | 9 | October 31, 2021 | |
| Coliform, total general | 2 | 24 | 6 | July 31, 2019 | 316% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 25 | 5 | April 30, 2019 | 238% over the limit |
| Coliform, fecal general | 0 | 6 | 2 | April 30, 2001 | 417% over the limit |
| Temperature, water deg. centigrade | 2 | 23 | 0 | ||
| Flow rate | 2 | 18 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 18 | 0 | ||
| Solids, total suspended | 2 | 18 | 0 | ||
| Duration of discharge | 1 | 11 | 0 | ||
| Flow, total | 1 | 9 | 0 | ||
| Nitrogen, total [as N] | 1 | 7 | 0 | ||
| Phosphorus, total [as P] | 1 | 7 | 0 | ||
| Flowing, Receiving Stream | 1 | 6 | 0 | ||
| E. coli, colony forming units [CFU] | 2 | 2 | 0 | ||
| Duration | 0 | 1 | 0 | ||
| Flow, total | 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 SD0021831.
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, SD0021831.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/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 SD0021831 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.