Clean Water Act discharge permit · NPDES CT0026794
NUCOR STEEL CONNECTICUT, INC., Wallingford, CT: NPDES CT0026794 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 20Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
NUCOR STEEL CONNECTICUT, INC., held by Nucor Steel Connecticut, Inc., holds NPDES permit CT0026794, which discharges to Quinnipiac River. EPA’s file records it issued December 30, 2009 and expiring December 31, 2014. 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 | NUCOR STEEL CONNECTICUT, INC. |
|---|---|
| Permittee as filed | Nucor Steel Connecticut, Inc. |
| NPDES ID | CT0026794 |
| 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 | December 30, 2009 |
| Expiration date | December 31, 2014 |
| Issuing agency | CT DEP |
| Address | Wallingford, CT 06492 |
| Receiving water | QUINNIPIAC RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Outlet Quinnipiac River (HUC 011000040105) |
| SIC | 3312 – Blast Furnaces And Steel Mills |
| Other EPA IDs (FRS) | RCRA handler CTD983870809; ICIS-AIR source CT0000000900906650 |
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
- 25Pollutants on file
- 20Under a numeric limit
- 25With 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 |
|---|---|---|---|---|---|
| Aluminum, total [as Al] | 2 | 57 | 13 | March 31, 2018 | 88% over the limit |
| Solids, total suspended | 4 | 71 | 8 | February 28, 2013 | 103% over the limit |
| Zinc, total [as Zn] | 4 | 43 | 8 | December 31, 2010 | 328% over the limit |
| Iron, total [as Fe] | 4 | 8 | 2 | February 28, 2007 | 5,900% over the limit |
| Oil & Grease | 2 | 50 | 1 | May 31, 2015 | 497% over the limit |
| pH, maximum | 0 | 9 | 1 | July 31, 2025 | |
| BOD, 5-day, 20 deg. C | 2 | 7 | 1 | May 31, 2015 | 475% over the limit |
| Lead, total [as Pb] | 4 | 54 | 0 | ||
| Copper, total [as Cu] | 4 | 34 | 0 | ||
| pH | 2 | 31 | 0 | ||
| Cadmium, total [as Cd] | 8 | 18 | 0 | ||
| Flow | 2 | 17 | 0 | ||
| Conductivity | 1 | 16 | 0 | ||
| Chlorine, total residual | 1 | 16 | 0 | ||
| Chromium, total [as Cr] | 4 | 14 | 0 | ||
| Nickel, total [as Ni] | 2 | 12 | 0 | ||
| Flow rate | 1 | 10 | 0 | ||
| pH, minimum | 0 | 10 | 0 | ||
| Flow, maximum during 24 hr period | 1 | 8 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 2 | 5 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 2 | 4 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 2 | 0 | ||
| E. coli | 0 | 2 | 0 | ||
| NOEC Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| NOEC Static Renewal 7Day Chronic Pimephales promelas | 0 | 1 | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 7, 2025 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| February 7, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| August 15, 2023 | Management Practice Violations - Failure to Maintain Records | ST6 |
| August 15, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| August 15, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 20, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES CT0026794.
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 CT0026794.
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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Start the watch
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How we handle your data → Privacy
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 CT0026794 there.
Nearby on the register
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- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.