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Clean Water Act discharge permit · NPDES CT0101150

PORTLAND WPCF, Portland, CT: NPDES CT0101150 discharge permit, effluent exceedances, inspections, penalties

PORTLAND WPCF holds NPDES permit CT0101150, which discharges to Connecticut River. EPA’s file records it issued September 22, 2017 and expiring September 30, 2022. 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 filedPORTLAND WPCF
Permittee as filedPORTLAND WPCF
NPDES IDCT0101150
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 22, 2017
Expiration dateSeptember 30, 2022
Issuing agencyCT DEP
AddressPortland, CT 06480
Receiving waterCONNECTICUT RIVER
Receiving water impaired303(D) Listed
SubwatershedMill Creek-Connecticut River (HUC 010802050702)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
BOD, 5-day, percent removal13432April 30, 2015200% over the limit
BOD, 5-day, 20 deg. C52525November 30, 2001487% over the limit
Chlorine, total residual21818September 30, 2001180% over the limit
Coliform, fecal general01818August 31, 20162,250% over the limit
Solids, suspended percent removal11817February 28, 2026180% over the limit
pH21212April 30, 2009
Solids, total suspended566February 28, 202648% over the limit
Enterococci266June 30, 2025141% over the limit
Flow, in conduit or thru treatment plant044February 28, 19991,417% over the limit
Ultraviolet light dosage111June 30, 2015100% over the limit
Nitrogen, ammonia total [as N]210
BOD, carbonaceous [5 day, 5 C]010
Phosphorus, total [as P]300
Flow rate200
Nitrogen, nitrite total [as N]200
Nitrogen, nitrate total [as N]200
Cyanide, total [as CN]200
Cyanide, free [amenable to chlorination]200
Arsenic, total [as As]200
Beryllium, total [as Be]200
Cadmium, total [as Cd]200
Chromium, hexavalent [as Cr]200
Chromium, total [as Cr]200
Copper, total [as Cu]200
Iron, total [as Fe]200
Lead, total [as Pb]200
Thallium, total [as Tl]200
Nickel, total [as Ni]200
Silver, total [as Ag]200
Zinc, total [as Zn]200
Antimony, total [as Sb]200
Aluminum, total [as Al]200
Selenium, total [as Se]200
Phenols200
Mercury, total [as Hg]200
NOAEL Static 48Hr Acute D. pulex200
NOAEL Static 48Hr Acute Pimephales promelas200
Polychlorinated biphenyls [PCBs]100
Arsenic, sludge tot. dry wt [as As]100
Beryllium, sludge, tot. dry wt [as Be]100
Solids, total, percent100
Solids, fixed, % of total solids100
Solids, volatile % of total solids100
Zinc, sludge, total, dry weight [as Zn]100
Lead, sludge, total, dry weight [as Pb]100
Nickel, sludge, total, dry weight [as Ni]100
Mercury, sludge, total, dry weight [as Hg]100
Chromium, sludge, total, dry weight [as Cr]100
Copper, sludge, total, dry weight [as Cu]100
Cadmium, sludge, total, dry weight [as Cd]100

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

DateWhat EPA recordedAgency
May 15, 2025Monitoring Violations - Invalid/Unrepresentative SampleST6
September 28, 2022Management Practice Violations - Improper Operation and MaintenanceST6
September 28, 2022Monitoring Violations - Invalid/Unrepresentative SampleST6
April 5, 2019Reporting Violations - Improper/ Incorrect ReportingST6
June 7, 2017Monitoring Violations - No Flow Measurement DeviceST6

Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, CT0101150.

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  • 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 CT0101150 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.