FRS Facility Detail Report


CONSTELLATION WEST MEDWAY LLC

EPA Registry Id: 110001949508
9 SUMMER STREET
MEDWAY, MA 02053


The facility locations displayed
come from the FRS Spatial
Coordinates tables. They are the
best representative locations for
the displayed facilities based on
the accuracy of the collection
method and quality assurance
checks performed against each
location. The North American
Datum of 1983 is used to display
all coordinates.

Environmental Interests

Information System System Facility Name Information System Id/Report Link Environmental Interest Type Data Source Last Updated Date Supplemental Environmental Interests:
CLEAN AIR MARKETS DIVISION (CAMD) BUSINESS SYSTEMS
MEDWAY STATION 1592 AIR PROGRAM CAMDBS 07/03/2007
RESOURCE CONSERVATION AND RECOVERY ACT INFORMATION SYSTEM
CONSTELLATION WEST MEDWAY LLC & WEST MEDWAY II LLC MAR000010736 SQG (Y) RCRAINFO

ENERGY INFORMATION ADMINISTRATION-860 (EIA-860) DATABASE
EXELON MEDWAY LLC 1592 ELECTRIC GENERATOR EIA-860 10/06/2020
ELECTRONIC PERMIT SYSTEM
EXELON WEST MEDWAY GENERATING STATION EPS10129407 AIR PROGRAM API 03/29/2022
MASSACHUSETTS - ENVIRONMENTAL PROTECTION INTEGRATED COMPUTER SYSTEM
EXELON WEST MEDWAY LLC 309313 STATE MASTER MA-EPICS
EPICS-36796
HAZARDOUS WASTE PROGRAM
EPICS-311297
AIR STATIONARY POINT SOURCE
EPICS-321233
HAZARDOUS WASTE PROGRAM
EPICS-51743
AIR STATIONARY POINT SOURCE
COMPLIANCE AND EMISSIONS DATA REPORTING INTERFACE
CONSTELLATION WEST MEDWAY, LLC CEDRI10164565 COMPLIANCE AND EMISSIONS REPORTING API 04/24/2025
INTEGRATED COMPLIANCE INFORMATION SYSTEM EXELON WEST MEDWAY GENERATING STATION 3000014217 ENFORCEMENT/COMPLIANCE ACTIVITY ICIS 06/11/2012
ELECTRONIC GREENHOUSE GAS REPORTING TOOL (E-GGRT)
MEDWAY STATION 1000655 GREENHOUSE GAS REPORTER E-GGRT

EMISSIONS & GENERATION RESOURCE INTEGRATED DATABASE
MEDWAY STATION 1592 ELECTRIC POWER GENERATOR (OIL BASED) EGRID 02/24/2020
AIR FACILITY SYSTEM
EXELON WEST MEDWAY LLC 2512000133 AIR MAJOR (OPERATING) AIRS/AFS 08/29/2014
RESOURCE CONSERVATION AND RECOVERY ACT INFORMATION SYSTEM
BOSTON EDISON CO STA 446J MAD982544934 UNSPECIFIED UNIVERSE (N) RCRAINFO

ICIS-AIR (AIR)
CONSTELLATION WEST MEDWAY LLC MA0000002512000133 AIR MAJOR ICIS 03/20/2023
EMISSION INVENTORY SYSTEM (EIS)
CONSTELLATION WEST MEDWAY LLC 5851311 CRITERIA AIR POLLUTANT MAJOR EIS 01/06/2025

Additional EPA Reports:  

MyEnvironment  Enforcement and Compliance  Facility Coordinates Viewer  Watershed Report

Standard Industrial Classification Codes (SIC)

Data Source SIC Code Description Primary
AIR
4911
ELECTRIC SERVICES

CAMDBS
4911
ELECTRIC SERVICES

AIRS/AFS
4911
ELECTRIC SERVICES

AIR
OWNE



AIRS/AFS
OWNE



Facility Codes and Flags

EPA Region: 01
Duns Number: 1807150
Congressional District Number: 04
Legislative District Number: C
HUC Code/Watershed: 01090001 / CHARLES
US Mexico Border Indicator:
Federal Facility: NO
Tribal Land: NO

Alternative Names

Alternative Name Source of Data
EXELON POWER AIRS/AFS
EXELON WEST MEDWAY LLC AIR
MEDWAY STATION E-GGRT
SITHE MEDWAY LLC RCRAINFO
EXELON MEDWAY LLC EGRID
EXELON POWER GENERATING STATION MANUAL ENTRY
EXELON WEST MEDWAY STATION, LLC OIL
SITHE NEW ENGLAND SAINT AIRS/AFS
BOSTON EDISON CO STA 446J RCRAINFO
EXELON, WEST MEDWAY GENERATING STATION MANUAL ENTRY

Organizations

Affiliation Type Name DUNS Number Information System Mailing Address
REGULATORY CONTACT
EXELON WEST MEDWAY LLC
MA-EPICS
View
OPERATOR
CONSTELLATION WEST MEDWAY LLC & WEST MEDWAY II LLC
RCRAINFO
View
PARENT OWNER
EXELON CORP
E-GGRT


REGULATORY CONTACT
BOSTON EDISON CO STA 446J
MA-EPICS
View
OWNER
BOSTON EDISON CO
RCRAINFO
View
PARENT OWNER
EXELON CORPORATION 1807150
E-GGRT


OWNER/OPERATOR
NSTAR ELECTRIC COMPANY
EIA-860


OWNER/OPERATOR
EXELON POWER
EIA-860
View
REGULATORY CONTACT
EXELON WEST MEDWAY LLC
MA-EPICS
View
REGULATORY CONTACT
EXELON WEST MEDWAY LLC
MA-EPICS
View
REGULATORY CONTACT
BOSTON ED STA 446
MA-EPICS
View
REGULATORY CONTACT
EXELON WEST MEDWAY LLC
MA-EPICS
View
TRANSMISSION OR DISTRIBUTION SYSTEM OWNER
NSTAR ELECTRIC COMPANY
EIA-860


OPERATOR
EXELON POWER
EGRID


OPERATOR
EXELON WEST MEDWAY, LLC
CAMDBS


PARENT COMPANY
EXELON POWER
EIA-860
View
OWNER
EXELON WEST MEDWAY LLC
MA-EPICS
View
OWNER
EXELON NEW ENGLAND HOLDINGS, LLC
CAMDBS


PARENT COMPANY
EXELON POWER
EIA-860
View
PARENT COMPANY
NSTAR ELECTRIC COMPANY
EGRID


OWNER
EXELON WEST MEDWAY LLC
MA-EPICS
View
OWNER
CONSTELLATION WEST MEDWAY LLC & WEST MEDWAY II LLC
RCRAINFO
View

National Industry Classification System Codes (NAICS)

Data Source NAICS Code Description Primary
CAMDBS 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
AIRS/AFS 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
AIR 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
EIS 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
E-GGRT 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
MA-EPICS 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.
MA-EPICS 2211 ELECTRIC POWER GENERATION, TRANSMISSION AND DISTRIBUTION
EIA-860 22

RCRAINFO 221112 FOSSIL FUEL ELECTRIC POWER GENERATION.

Facility Mailing Addresses

Affiliation Type Delivery Point City Name State Postal Code Information System
PRIMARY FACILITY SITE CONTACT 173 ALFORD STREET CHARLESTOWN MA 02129 CAMDBS
OWNER 9 SUMMER ST MEDWAY MA 02053-0000 RCRAINFO
REGULATORY CONTACT 529 MAIN ST CHARLESTOWN MA 02129-0000 MA-EPICS
OWNER PO BOX 720 EAST AMWELL TWP NJ 08551 RCRAINFO
UNKNOWN CONTACT 1 WINTER STREET BOSTON MA 02108 CAMDBS
FACILITY MAILING ADDRESS 776 SUMMER STREET S. BOSTON MA 021270000 AIR
REGULATORY CONTACT PO BOX 720 MEDWAY MA 02053 MA-EPICS
PARENT COMPANY 300 EXELON WAY ROOM 340 KENNETT SQUARE PA 19348 EIA-860
FACILITY MAILING ADDRESS 776 SUMMER STREET BOSTON MA 021270000 MA-EPICS
UNKNOWN CONTACT 173 ALFORD STREET CHARLESTOWN MA 02129 CAMDBS
PERMIT CONTACT 1 WINTER STREET BOSTON MA 02108 CAMDBS
OWNER/OPERATOR 300 EXELON WAY ROOM 340 KENNETT SQUARE PA 19348 EIA-860
OWNER 776 SUMMER STREET BOSTON MA 021270000 MA-EPICS
REGULATORY CONTACT 9 SUMMER ST MEDWAY MA 02053-0000 RCRAINFO
OPERATOR PO BOX 720 EAST AMWELL TWP NJ 08551 RCRAINFO
REGULATORY CONTACT 1 WINTER STREET BOSTON MA 02108 CAMDBS
REGULATORY CONTACT 800 BOYLSTON ST BOSTON MA 02199-0000 MA-EPICS
PERMIT CONTACT BUREAU OF WASTE PREVENTION BOSTON MA 02108 CAMDBS
FACILITY MAILING ADDRESS PO BOX 720 MEDWAY MA 02053 RCRAINFO
UNKNOWN CONTACT BUREAU OF WASTE PREVENTION BOSTON MA 02108 CAMDBS
REGULATORY CONTACT BUREAU OF WASTE PREVENTION BOSTON MA 02108 CAMDBS
FACILITY MAILING ADDRESS 776 SUMMER STREET S. BOSTON MA 021270000 AIRS/AFS
FACILITY MAILING ADDRESS 9 SUMMER ST MEDWAY MA 02053-0000 RCRAINFO
REGULATORY CONTACT 9 SUMMER ST MEDWAY MA 02053-0000 MA-EPICS
REGULATORY CONTACT PO BOX 720 MEDWAY MA 02053 RCRAINFO

Contacts

Affiliation Type Full Name Office Phone Information System Mailing Address
REGULATORY CONTACT
MARC COHEN
6172925873
CAMDBS
View
UNKNOWN CONTACT
MICHELLE THIBODEAU
6172925664
CAMDBS
View
REGULATORY CONTACT
SUE ANN RICHARDSON
6173484098
CAMDBS
View
PERMIT CONTACT
SHARON M WEBER
6175561190
CAMDBS
View
PERMIT CONTACT
MICHELLE THIBODEAU
6172925664
CAMDBS
View
UNKNOWN CONTACT
TERRY DOYLE 61746
5084242319
AIRS/AFS


REGULATORY CONTACT
MICHELLE THIBODEAU
6172925664
CAMDBS
View
UNKNOWN CONTACT
MARC COHEN
6172925873
CAMDBS
View
REGULATORY CONTACT
SHARON M WEBER
6175561190
CAMDBS
View
UNKNOWN CONTACT
MARC WOLMAN
6172925515
CAMDBS
View
REGULATORY CONTACT
MARC WOLMAN
6172925515
CAMDBS
View
COMPLIANCE CONTACT
TERRY DOYLE 61746
5084242319
AIRS/AFS


REGULATORY CONTACT
BOBBIE STERNE
508-533-3959
RCRAINFO
View
PERMIT CONTACT
MARC WOLMAN
6172925515
CAMDBS
View
PERMIT CONTACT
SUE ANN RICHARDSON
6173484098
CAMDBS
View
UNKNOWN CONTACT
TERRY DOYLE 61746
5084242319
AIR


COMPLIANCE CONTACT
TERRY DOYLE 61746
5084242319
AIR


UNKNOWN CONTACT
SHARON M WEBER
6175561190
CAMDBS
View
PRIMARY FACILITY SITE CONTACT
JAMES KELLY
6173812398
CAMDBS
View
UNKNOWN CONTACT
GARY BASILESCO
6173812335
CAMDBS
View
UNKNOWN CONTACT
SUE ANN RICHARDSON
6173484098
CAMDBS
View

Query executed on: OCT-14-2025