Clean Water Act discharge permit · NPDES CT0020630
MYSTIC MARINELIFE AQUARIUM, Mystic, CT: NPDES CT0020630 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MYSTIC MARINELIFE AQUARIUM, held by SEA RESEARCH FOUNDATION, holds NPDES permit CT0020630, which discharges to Mystic River. EPA’s file records it issued November 1, 2000 and expiring October 31, 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 | MYSTIC MARINELIFE AQUARIUM |
|---|---|
| Permittee as filed | SEA RESEARCH FOUNDATION |
| NPDES ID | CT0020630 |
| 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 1, 2000 |
| Expiration date | October 31, 2005 |
| Issuing agency | CT DEP |
| Address | Mystic, CT 06355 |
| Receiving water | MYSTIC RIVER |
| Subwatershed | Stony Brook-Frontal Fishers Island Sound (HUC 011000030303) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 8Under a numeric limit
- 10With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Flow | 5 | 27 | 11 | March 31, 2011 | 1,154% over the limit |
| Chlorine, total residual | 7 | 32 | 9 | July 31, 2024 | 2,850% over the limit |
| pH | 12 | 41 | 6 | June 30, 2022 | |
| Coliform, fecal general | 7 | 22 | 0 | ||
| Flow rate | 6 | 19 | 0 | ||
| Flow, maximum during 24 hr period | 6 | 18 | 0 | ||
| Duration of discharge | 5 | 16 | 0 | ||
| Solids, total suspended | 0 | 2 | 0 | ||
| Copper, total [as Cu] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 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
- 17Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 27, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| May 27, 2026 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| May 27, 2026 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 27, 2026 | Monitoring Violations - Failure to Monitor for Toxicity Requirements | ST6 |
| May 27, 2026 | Effluent Violations - Unapproved Bypass | ST6 |
| March 27, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| March 27, 2024 | Effluent Violations - Unapproved Bypass | ST6 |
| March 27, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| March 27, 2024 | Reporting Violations - Failure to Notify | ST6 |
| March 27, 2024 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| March 27, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 27, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| February 10, 2020 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| February 10, 2020 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| February 10, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| February 10, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 10, 2020 | Reporting Violations - Improper/ Incorrect Reporting | 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 CT0020630 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.