Clean Water Act discharge permit · NPDES SD0023281
CUSTER, CITY OF, Custer, SD: NPDES SD0023281 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 19Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CUSTER, CITY OF, held by Custer, City of, holds NPDES permit SD0023281, which discharges to Flynn Creek. EPA’s file records it issued March 22, 2013 and expiring March 31, 2018. 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 | CUSTER, CITY OF |
|---|---|
| Permittee as filed | Custer, City of |
| NPDES ID | SD0023281 |
| 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 | March 22, 2013 |
| Expiration date | March 31, 2018 |
| Issuing agency | SDDENR |
| Address | Custer, SD 57730 |
| Receiving water | Flynn Creek |
| Subwatershed | South Fork Lame Johnny Creek (HUC 101201090401) |
| 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
- 22Pollutants on file
- 19Under a numeric limit
- 21With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 34 | 20 | August 31, 2012 | 99,999% over the limit |
| Solids, total suspended | 5 | 13 | 4 | December 31, 2020 | 2,983% over the limit |
| pH | 6 | 11 | 1 | May 31, 2020 | |
| BOD, 5-day, 20 deg. C | 5 | 10 | 1 | October 31, 2016 | 10% over the limit |
| Nitrogen, nitrate total [as N] | 2 | 11 | 0 | ||
| Phosphorus, total [as P] | 2 | 11 | 0 | ||
| Nitrogen, ammonia total [as N] | 5 | 9 | 0 | ||
| Temperature, water deg. centigrade | 5 | 7 | 0 | ||
| Flow rate | 5 | 7 | 0 | ||
| Nitrogen, total [as N] | 0 | 7 | 0 | ||
| Nitrogen, nitrite total [as N] | 2 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 5 | 0 | ||
| Chloride [as Cl] | 2 | 5 | 0 | ||
| Sulfate, total [as SO4] | 2 | 5 | 0 | ||
| Solids, total dissolved | 2 | 5 | 0 | ||
| E. coli, colony forming units [CFU] | 3 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 2 | 0 | ||
| Flow, total | 3 | 1 | 0 | ||
| Conductivity | 2 | 1 | 0 | ||
| Sodium adsorption ratio | 2 | 1 | 0 | ||
| Duration of Land Application | 0 | 1 | 0 | ||
| Duration of discharge | 2 | 0 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 22, 2025 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
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.
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Nearby on the register
- Discharge permits in Custer
- Every permit record in Custer, 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.