Clean Water Act discharge permit · NPDES SD0027944
POET BIOREFINING - HUDSON, Hudson, SD: NPDES SD0027944 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 26Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
POET BIOREFINING - HUDSON, held by Poet Biorefining - Hudson, holds NPDES permit SD0027944, which discharges to Unnamed Tributary Of Pattee Creek. EPA’s file records it issued January 1, 2020 and expiring December 31, 2024.
POET BIOREFINING - HUDSON, Hudson, South Dakota: Individual permit SD0027944, held by Poet Biorefining - Hudson; Administratively continued (past its expiration date and still in force until reissued); issued January 1, 2020, term to December 31, 2024, by SDDANR; discharges to Unnamed Tributary of Pattee Creek; All Other Basic Organic Chemical Manufacturing.
- Solids, total suspended: 2 limits, 12 violations of any kind, 12 effluent exceedances, latest August 31, 2008, largest 138% over the limit.
- Chlorine, total residual: 1 limit, 2 violations of any kind, 2 effluent exceedances, latest November 30, 2004, largest 34,111% over the limit.
- Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest September 30, 2008.
- Flow rate: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Conductivity: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- pH: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Silver total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, total [as Hg]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, hexavalent tot recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. centigrade: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Oil and grease, hexane extr method: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Floating solids, waste or visible foam-visual: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Ceriodaphnia dubia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Oil and grease visual: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- August 6, 2026: Evaluation (S).
POET BIOREFINING - HUDSON among its neighbors
EPA’s permit file holds 2 discharge permits in the Pattee Creek subwatershed (HUC 101702031907), SD0027944 among them. Its county holds 26, 0 of them major permits; SD0027944 is a minor permit.
Other permits in the Pattee Creek subwatershed (HUC 101702031907)
- POET BIOPROCESSING HUDSON CO2 PLANT ADDITION, Hudson: SDR10P5S1, minor permit, permit term to October 31, 2028
Identity
| Facility as filed | POET BIOREFINING - HUDSON |
|---|---|
| Permittee as filed | Poet Biorefining - Hudson |
| NPDES ID | SD0027944 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 1, 2020 |
| Expiration date | December 31, 2024 |
| Issuing agency | SDDANR |
| Address | Hudson, SD 57034 |
| Receiving water | Unnamed Tributary of Pattee Creek |
| Subwatershed | Pattee Creek (HUC 101702031907) |
| NAICS | 325199 – All Other Basic Organic Chemical Manufacturing |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler SDR000203240; ICIS-AIR source SD0000004608300004 |
Effluent limits and exceedances
- 27Pollutants on file
- 26Under a numeric limit
- 3With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 12 | 12 | August 31, 2008 | 138% over the limit |
| Chlorine, total residual | 1 | 2 | 2 | November 30, 2004 | 34,111% over the limit |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 2 | 2 | September 30, 2008 | |
| Flow rate | 2 | 0 | 0 | ||
| Conductivity | 2 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Arsenic, total recoverable | 2 | 0 | 0 | ||
| Selenium, total recoverable | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Nickel, total recoverable | 2 | 0 | 0 | ||
| Silver total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 0 | 0 | ||
| Lead, total recoverable | 2 | 0 | 0 | ||
| Solids, total dissolved | 2 | 0 | 0 | ||
| Mercury, total [as Hg] | 2 | 0 | 0 | ||
| Chromium, hexavalent tot recoverable | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Oil and grease, hexane extr method | 1 | 0 | 0 | ||
| Floating solids, waste or visible foam-visual | 1 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES SD0027944.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| August 6, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES SD0027944.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.