Clean Water Act discharge permit · NPDES RI0000434

MANCHESTER ST. POWER STATION, Providence, RI: NPDES RI0000434 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
11Pollutants under a numeric limit
5Pollutants with an effluent exceedance

MANCHESTER ST. POWER STATION, held by MANCHESTER STREET L.L.C. AND EDGEWATER GENERATION L.L.C., holds NPDES permit RI0000434, which discharges to Providence River. EPA’s file records it issued September 19, 1991 and expiring October 19, 1996. 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	MANCHESTER ST. POWER STATION
Permittee as filed	MANCHESTER STREET L.L.C. AND EDGEWATER GENERATION L.L.C.
NPDES ID	RI0000434
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	September 19, 1991
Expiration date	October 19, 1996
Address	Providence, RI 02903
Receiving water	PROVIDENCE RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Seekonk River-Providence River (HUC 010900040901)
Other EPA IDs (FRS)	RCRA handler RID001193655; ICIS-AIR source RI0000004400700039

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
8With a violation of any kind
5With 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	12	18	16	June 30, 1993
Solids, total suspended	2	6	4	December 31, 1992	790% over the limit
Oil & Grease	2	5	3	September 30, 2002	280% over the limit
pH change [range]	2	3	2	April 30, 2000
Temp. diff. between intake and discharge	2	2	2	September 30, 1992	6% over the limit
Flow, in conduit or thru treatment plant	7	4	0
Chlorine, total residual	4	4	0
Flow, total	1	1	0
Temperature, water deg. fahrenheit	2	0	0
Heat [summer] [per hour]	1	0	0
Heat [winter] [per hour]	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES RI0000434.

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

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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 RI0000434 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES RI0000434 for the Manchester St. Power Station in Providence, RI, held by Manchester Street L.L.C. and Edgewater Generation L.L.C., and is administratively continued. The page lists 5 pollutants under a numeric limit and 5 pollutants with an effluent exceedance, and the facility is classed as a Major Discharger.