Clean Water Act discharge permit · NPDES SD0027910
POET BIOREFINING - GROTON, Groton, SD: NPDES SD0027910 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 31Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
POET BIOREFINING - GROTON, held by POET Biorefining - Groton, holds NPDES permit SD0027910, which discharges to James River. EPA’s file records it issued March 16, 2009 and expiring March 31, 2014.
POET BIOREFINING - GROTON, Groton, South Dakota: Individual permit SD0027910, held by POET Biorefining - Groton; Administratively continued (past its expiration date and still in force until reissued); issued March 16, 2009, term to March 31, 2014, by SDDENR; discharges to JAMES RIVER; Petrochemical Manufacturing.
- BOD, 5-day, 20 deg. C: 2 limits, 32 violations of any kind, 28 effluent exceedances, latest May 31, 2020, largest 99,999% over the limit.
- Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia: 1 limit, 11 violations of any kind, 11 effluent exceedances, latest December 31, 2012.
- Conductivity: 2 limits, 7 violations of any kind, 3 effluent exceedances, latest April 30, 2013, largest 9% over the limit.
- Nitrogen, ammonia total [as N]: 2 limits, 5 violations of any kind, 3 effluent exceedances, latest August 31, 2019, largest 162% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 4 violations of any kind, 3 effluent exceedances, latest October 31, 2019, largest 50% over the limit.
- Chlorine, total residual: 1 limit, 4 violations of any kind, 2 effluent exceedances, latest August 31, 2013, largest 163,058% over the limit.
- pH: 2 limits, 5 violations of any kind, 1 effluent exceedance, latest May 31, 2013.
- Temperature, water deg. fahrenheit: 4 limits, 8 violations of any kind, 0 effluent exceedances.
- Molybdenum, total recoverable: 0 limits, 8 violations of any kind, 0 effluent exceedances.
- Alkalinity, total [as CaCO3]: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 1 limit, 7 violations of any kind, 0 effluent exceedances.
- Arsenic, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Selenium, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Nickel, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Silver total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Cadmium, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Lead, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Chromium, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Mercury, total recoverable: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Flow rate: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Ceriodaphnia dubia: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Nitrogen, nitrate total [as N]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Zinc, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Copper, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Temp. diff. between up/down stream deg. F: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Floating solids, waste or visible foam-visual: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Oil and grease visual: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Oil and grease, hexane extr method: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Flow, total: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Oil & Grease: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- Duration of discharge: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- Hydrocarbons, petroleum: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 24, 2026: Evaluation (S).
POET BIOREFINING - GROTON among its neighbors
EPA’s permit file holds 2 discharge permits in the Crow Creek Drainage Ditch-James River subwatershed (HUC 101600032103), SD0027910 among them. Its county holds 22, 1 of them major permits; SD0027910 is a minor permit.
Other permits in the Crow Creek Drainage Ditch-James River subwatershed (HUC 101600032103)
- PCN 06XE, Bath: SDR10P390, not classed
Identity
| Facility as filed | POET BIOREFINING - GROTON |
|---|---|
| Permittee as filed | POET Biorefining - Groton |
| NPDES ID | SD0027910 |
| 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 | March 16, 2009 |
| Expiration date | March 31, 2014 |
| Issuing agency | SDDENR |
| Address | Groton, SD 57445 |
| Receiving water | JAMES RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Crow Creek Drainage Ditch-James River (HUC 101600032103) |
| NAICS | 325110 – Petrochemical Manufacturing |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler SDR000202689; ICIS-AIR source SD0000004601300007 |
Effluent limits and exceedances
- 37Pollutants on file
- 31Under a numeric limit
- 36With a violation of any kind
- 7With 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 | 32 | 28 | May 31, 2020 | 99,999% over the limit |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 11 | 11 | December 31, 2012 | |
| Conductivity | 2 | 7 | 3 | April 30, 2013 | 9% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 5 | 3 | August 31, 2019 | 162% over the limit |
| Oxygen, dissolved [DO] | 1 | 4 | 3 | October 31, 2019 | 50% over the limit |
| Chlorine, total residual | 1 | 4 | 2 | August 31, 2013 | 163,058% over the limit |
| pH | 2 | 5 | 1 | May 31, 2013 | |
| Temperature, water deg. fahrenheit | 4 | 8 | 0 | ||
| Molybdenum, total recoverable | 0 | 8 | 0 | ||
| Alkalinity, total [as CaCO3] | 2 | 7 | 0 | ||
| Solids, total suspended | 1 | 7 | 0 | ||
| Arsenic, total recoverable | 2 | 6 | 0 | ||
| Selenium, total recoverable | 2 | 6 | 0 | ||
| Nickel, total recoverable | 2 | 6 | 0 | ||
| Silver total recoverable | 2 | 6 | 0 | ||
| Cadmium, total recoverable | 2 | 6 | 0 | ||
| Lead, total recoverable | 2 | 6 | 0 | ||
| Chromium, total recoverable | 2 | 6 | 0 | ||
| Mercury, total recoverable | 2 | 6 | 0 | ||
| Flow rate | 2 | 4 | 0 | ||
| Solids, total dissolved | 2 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 4 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 4 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Copper, total recoverable | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Temp. diff. between up/down stream deg. F | 1 | 2 | 0 | ||
| Floating solids, waste or visible foam-visual | 1 | 2 | 0 | ||
| Oil and grease visual | 1 | 2 | 0 | ||
| Oil and grease, hexane extr method | 2 | 1 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Oil & Grease | 0 | 1 | 0 | ||
| Duration of discharge | 0 | 1 | 0 | ||
| Hydrocarbons, petroleum | 0 | 1 | 0 | ||
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 1 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES SD0027910.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| September 24, 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 SD0027910.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.