Clean Water Act discharge permit · NPDES CT0100978
SPRAGUE WWTP, Baltic, CT: NPDES CT0100978 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 24Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
SPRAGUE WWTP holds NPDES permit CT0100978, which discharges to Shetucket River. EPA’s file records it issued December 23, 2005 and expiring December 22, 2010. 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 | SPRAGUE WWTP |
|---|---|
| Permittee as filed | SPRAGUE WWTP |
| NPDES ID | CT0100978 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 23, 2005 |
| Expiration date | December 22, 2010 |
| Issuing agency | CT DEP |
| Address | Baltic, CT 06330 |
| Receiving water | SHETUCKET RIVER |
| Subwatershed | Little River (HUC 011000020302) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler CTD000636555 |
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
- 25Pollutants on file
- 24Under a numeric limit
- 8With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 1 | 18 | 18 | August 31, 2015 | 53% over the limit |
| Solids, total suspended | 3 | 7 | 7 | March 31, 2011 | 440% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 6 | 6 | November 30, 2005 | 440% over the limit |
| BOD, 5-day, percent removal | 1 | 6 | 6 | June 30, 2019 | 553% over the limit |
| Chlorine, total residual | 2 | 3 | 3 | May 31, 2015 | 40% over the limit |
| E. coli | 0 | 3 | 3 | June 30, 2019 | 1,237% over the limit |
| pH | 2 | 3 | 2 | May 31, 2006 | |
| Flow, in conduit or thru treatment plant | 2 | 2 | 2 | August 31, 2011 | 255% over the limit |
| Coliform, fecal general | 2 | 0 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 0 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 0 | 0 | ||
| Solids, total, percent | 1 | 0 | 0 | ||
| Solids, fixed, % of total solids | 1 | 0 | 0 | ||
| Solids, volatile % of total solids | 1 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 0 | 0 | ||
| Copper, sludge, total, dry weight [as Cu] | 1 | 0 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 1 | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 27, 2026 | Effluent Violations - Narrative Effluent Violation | ST6 |
| May 27, 2026 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| May 27, 2026 | Management Practice Violations - Failure to Maintain Records | ST6 |
| May 27, 2026 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| May 27, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| December 12, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| December 12, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| December 12, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 12, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| November 5, 2018 | Permit Violations - Violation Specified in Comment | 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 CT0100978 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.