Clean Water Act discharge permit · NPDES SDPIU0022
RIDDLES GROUP CORPORATE OFFICE, Rapid City, SD: NPDES SDPIU0022 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
RIDDLES GROUP CORPORATE OFFICE, held by Ridco Inc., holds NPDES permit SDPIU0022. EPA’s file records it issued January 1, 2025 and expiring December 31, 2029. 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 RIDDLES GROUP CORPORATE OFFICE: its NPDES ID, its permit type and status, its dates, its address in Rapid City, South Dakota. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES SDPIU0022.
Identity
| Facility as filed | RIDDLES GROUP CORPORATE OFFICE |
|---|---|
| Permittee as filed | Ridco Inc. |
| NPDES ID | SDPIU0022 |
| Permit status | Effective |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 1, 2025 |
| Expiration date | December 31, 2029 |
| Issuing agency | Rapid City, City Of |
| Address | Rapid City, SD 57701 |
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 SDPIU0022.
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 SDPIU0022.
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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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 SDPIU0022 there.
Nearby on the register
- Discharge permits in Rapid City
- Every permit record in Rapid City, 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 September 15, 2026.