Clean Water Act discharge permit · NPDES CT0030228
NGC/SHEPAUG HYDROELECTRIC, Southbury, CT: NPDES CT0030228 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
NGC/SHEPAUG HYDROELECTRIC, held by NGC/SHEPAUG HYDRO-ELECTRIC, holds NPDES permit CT0030228, which discharges to Housatonic River. EPA’s file records it issued July 1, 1999 and expiring July 11, 2004. 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 | NGC/SHEPAUG HYDROELECTRIC |
|---|---|
| Permittee as filed | NGC/SHEPAUG HYDRO-ELECTRIC |
| NPDES ID | CT0030228 |
| 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 | July 1, 1999 |
| Expiration date | July 11, 2004 |
| Issuing agency | CT DEP |
| Address | Southbury, CT 06488 |
| Receiving water | HOUSATONIC RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Outlet Still River (HUC 011000050803) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 8Under a numeric limit
- 14With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| pH | 4 | 8 | 2 | January 31, 2026 | |
| Oil & Grease | 1 | 4 | 2 | May 31, 2017 | 40% over the limit |
| Flow | 0 | 8 | 0 | ||
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 5 | 0 | ||
| Noel Statre 7Day Chronic Pimephales | 0 | 5 | 0 | ||
| Zinc, total [as Zn] | 2 | 3 | 0 | ||
| Flow rate | 0 | 3 | 0 | ||
| Copper, total [as Cu] | 2 | 2 | 0 | ||
| Lead, total [as Pb] | 2 | 2 | 0 | ||
| Duration of discharge | 2 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 2 | 0 | ||
| Flow, maximum during 24 hr period | 0 | 2 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 0 | 2 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 0 | 2 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 4 | 0 | 0 | ||
| LC50 Static 48Hr 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 6, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 6, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES CT0030228.
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 CT0030228.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, CT0030228.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 CT0030228 there.
Nearby on the register
- Discharge permits in Southbury
- Every permit record in Southbury, 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.