Clean Water Act discharge permit · NPDES CT0020656
TILCON CONNECTICUT INC., Plainville, CT: NPDES CT0020656 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
TILCON CONNECTICUT INC. holds NPDES permit CT0020656, which discharges to Quinnipiac River. EPA’s file records it issued November 20, 2003 and expiring November 19, 2008. 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 | TILCON CONNECTICUT INC. |
|---|---|
| Permittee as filed | TILCON CONNECTICUT INC. |
| NPDES ID | CT0020656 |
| 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 | November 20, 2003 |
| Expiration date | November 19, 2008 |
| Issuing agency | CT DEP |
| Address | Plainville, CT 06062 |
| Receiving water | QUINNIPIAC RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Headwaters Quinnipiac River (HUC 011000040103) |
| SIC | 1429 – Crushed And Broken Stone |
| Other EPA IDs (FRS) | RCRA handler CTD023548787; ICIS-AIR source CT0000000900309290 |
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
- 10Pollutants on file
- 10Under a numeric limit
- 4With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 2 | 19 | 19 | October 31, 2011 | 366% over the limit |
| Chlorine, total residual | 2 | 2 | 2 | June 30, 2006 | 1,300% over the limit |
| Flow | 2 | 1 | 1 | June 30, 2004 | 16% over the limit |
| Oil & Grease | 1 | 1 | 1 | October 31, 2008 | 100% over the limit |
| pH | 2 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 4, 2020 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| November 4, 2020 | Permit Violations - CWA §308 Failure to submit required permit application information | 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.
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, CT0020656.
Start the watch
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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 CT0020656 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.