Clean Water Act discharge permit · NPDES CTSIU0093
ROCKVILLE WATER TREATMENT PLANT, Vernon Rockville, CT: NPDES CTSIU0093 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ROCKVILLE WATER TREATMENT PLANT, held by THE CONNECTICUT WATER CO, holds NPDES permit CTSIU0093, which discharges to Hockanum River. EPA’s file records it issued December 8, 2023 and expiring October 30, 2025. 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 | ROCKVILLE WATER TREATMENT PLANT |
|---|---|
| Permittee as filed | THE CONNECTICUT WATER CO |
| NPDES ID | CTSIU0093 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 8, 2023 |
| Expiration date | October 30, 2025 |
| Issuing agency | CT DEEP |
| Address | Vernon Rockville, CT 06066 |
| Receiving water | Hockanum River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Upper Hockanum River (HUC 010802050401) |
| Other EPA IDs (FRS) | RCRA handler CTP000035712 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 12Pollutants on file
- 12Under a numeric limit
- 0With a violation of any kind
- 0With 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 | 6 | 0 | 0 | ||
| Copper, total [as Cu] | 4 | 0 | 0 | ||
| Solids, total suspended | 3 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Arsenic, total [as As] | 3 | 0 | 0 | ||
| Lead, total [as Pb] | 3 | 0 | 0 | ||
| Zinc, total [as Zn] | 3 | 0 | 0 | ||
| Flow rate | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 2 | 0 | 0 | ||
| Flow, maximum during 24 hr period | 2 | 0 | 0 | ||
| Flow | 2 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES CTSIU0093.
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 |
|---|---|---|
| October 30, 2025 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| October 30, 2025 | Reporting Violations - Failure to Submit DMRs | 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, CTSIU0093.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 CTSIU0093 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.