Clean Water Act discharge permit · NPDES CT0026476
AHLSTROM POWER WINDSOR LOCKS, LLC, Windsor Locks, CT: NPDES CT0026476 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
AHLSTROM POWER WINDSOR LOCKS, LLC, held by ALGONQUIN WINDSOR LOCKS LLC, holds NPDES permit CT0026476, which discharges to Connecticut River. EPA’s file records it issued March 28, 2003 and expiring September 29, 2005. 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.
Identity
| Facility as filed | AHLSTROM POWER WINDSOR LOCKS, LLC |
|---|---|
| Permittee as filed | ALGONQUIN WINDSOR LOCKS LLC |
| NPDES ID | CT0026476 |
| 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 28, 2003 |
| Expiration date | September 29, 2005 |
| Issuing agency | CT DEP |
| Address | Windsor Locks, CT 06096 |
| Receiving water | CONNECTICUT RIVER |
| Subwatershed | Freshwater Brook-Connecticut River (HUC 010802050105) |
| Other EPA IDs (FRS) | RCRA handler CTP000035194; ICIS-AIR source CT0000000900309313 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 29Pollutants on file
- 25Under a numeric limit
- 26With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 1 | 13 | 8 | March 31, 2013 | 900% over the limit |
| Temp. diff. between intake and discharge | 1 | 6 | 4 | September 30, 2016 | 7% over the limit |
| pH, maximum | 0 | 8 | 3 | September 30, 2020 | |
| NOAEL Static 48Hr Acute Pimephales promelas | 0 | 4 | 2 | September 30, 2023 | 8% over the limit |
| pH, minimum | 0 | 7 | 1 | July 31, 2013 | |
| Zinc, dissolved [as Zn] | 4 | 21 | 0 | ||
| Zinc, total [as Zn] | 4 | 21 | 0 | ||
| Lead, total [as Pb] | 4 | 17 | 0 | ||
| Copper, total [as Cu] | 4 | 14 | 0 | ||
| Nickel, total [as Ni] | 4 | 14 | 0 | ||
| Copper, dissolved [as Cu] | 4 | 11 | 0 | ||
| Nickel, dissolved [as Ni] | 4 | 11 | 0 | ||
| Chromium, total [as Cr] | 4 | 9 | 0 | ||
| pH | 2 | 8 | 0 | ||
| Solids, total suspended | 4 | 5 | 0 | ||
| Chromium, dissolved [as Cr] | 4 | 5 | 0 | ||
| Lead, dissolved [as Pb] | 4 | 5 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 4 | 0 | ||
| Surfactants [MBAS] | 4 | 4 | 0 | ||
| Solids, total dissolved | 4 | 4 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 3 | 0 | ||
| Flow rate | 1 | 3 | 0 | ||
| Flow rate | 1 | 3 | 0 | ||
| Flow, maximum during 24 hr period | 1 | 3 | 0 | ||
| Flow | 1 | 2 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 0 | 1 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 2 | 0 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 2 | 0 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 31, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 31, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| November 1, 2023 | Effluent Violations - Failed Toxicity Test | ST6 |
| October 1, 2023 | Effluent Violations - Failed Toxicity Test | ST6 |
| September 21, 2023 | Effluent Violations - Failed Toxicity Test | ST6 |
| September 21, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| September 21, 2023 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
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.
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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 CT0026476 there.
Nearby on the register
- Discharge permits in Windsor Locks
- Every permit record in Windsor Locks, A to Z
- Discharge permits in Connecticut
- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.