Clean Water Act discharge permit · NPDES SDPG00001
KOYKER MANUFACTURING COMPANY, Lennox, SD: NPDES SDPG00001 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
KOYKER MANUFACTURING COMPANY, held by Koyker Manufacturing Company, holds NPDES permit SDPG00001, which discharges to City Of Lennox Potw. EPA’s file records it issued July 1, 2015 and expiring June 30, 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 | KOYKER MANUFACTURING COMPANY |
|---|---|
| Permittee as filed | Koyker Manufacturing Company |
| NPDES ID | SDPG00001 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 1, 2015 |
| Expiration date | June 30, 2020 |
| Issuing agency | SD DENR |
| Address | Lennox, SD 57039 |
| Receiving water | City of Lennox POTW |
| NAICS | 332212 – Hand and Edge Tool Manufacturing [2007] |
| SIC | 3523 – Farm Machinery And Equipment |
| Other EPA IDs (FRS) | RCRA handler SDD094684842; ICIS-AIR source SD0000004608300001 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 15Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Zinc, total [as Zn] | 2 | 38 | 4 | March 31, 2023 | 116% over the limit |
| Flow, process wastewater | 2 | 45 | 0 | ||
| Flow rate | 2 | 39 | 0 | ||
| Cyanide, total [as CN] | 2 | 31 | 0 | ||
| Copper, total [as Cu] | 2 | 30 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 28 | 0 | ||
| pH | 2 | 28 | 0 | ||
| Cadmium, total [as Cd] | 2 | 28 | 0 | ||
| Chromium, total [as Cr] | 2 | 28 | 0 | ||
| Lead, total [as Pb] | 2 | 28 | 0 | ||
| Nickel, total [as Ni] | 2 | 28 | 0 | ||
| Silver, total [as Ag] | 2 | 28 | 0 | ||
| Organics, total toxic [TTO] | 1 | 17 | 0 | ||
| Duration of discharge | 1 | 15 | 0 | ||
| Flow, total | 1 | 14 | 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 SDPG00001.
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 SDPG00001 there.
Nearby on the register
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- Every permit record in Lennox, A to Z
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- Every permit record in South Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.