Clean Water Act discharge permit · NPDES SDG589501
ALLEN LAGOON, Allen, SD: NPDES SDG589501 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ALLEN LAGOON, held by Oglala Sioux Tribe Water and Sewer, holds NPDES permit SDG589501. 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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ALLEN LAGOON |
|---|---|
| Permittee as filed | Oglala Sioux Tribe Water and Sewer |
| NPDES ID | SDG589501 |
| 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 Region8 |
| Address | Allen, SD 57714 |
| Subwatershed | Headwaters of Bear-in-the-Lodge Creek (HUC 101402020301) |
| 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
- 15Pollutants on file
- 10Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 2 | 54 | 0 | ||
| Solids, total suspended | 2 | 54 | 0 | ||
| pH | 2 | 32 | 0 | ||
| Temperature, water deg. centigrade | 2 | 27 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 27 | 0 | ||
| Flow, total | 2 | 22 | 0 | ||
| Nitrogen, total [as N] | 1 | 16 | 0 | ||
| Phosphorus, total [as P] | 1 | 16 | 0 | ||
| Oil & Grease | 1 | 11 | 0 | ||
| Oil and grease visual | 1 | 11 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 10 | 0 | ||
| E. coli | 0 | 10 | 0 | ||
| Nitrogen, Kjeldahl Total | 0 | 10 | 0 | ||
| BOD, 5-day, percent removal | 0 | 5 | 0 | ||
| Solids, suspended percent removal | 0 | 5 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SDG589501.
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 SDG589501.
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, SDG589501.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 SDG589501 there.
Nearby on the register
- Discharge permits in Allen
- Every permit record in Allen, 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 October 14, 2026.