Clean Water Act discharge permit · NPDES RIR50S001

RI AIRPORT CORP NEWPORT AIRPORT, Middletown, RI: NPDES RIR50S001 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

RI AIRPORT CORP NEWPORT AIRPORT, held by RHODE ISLAND AIRPORT CORP., holds NPDES permit RIR50S001, which discharges to Bailey Brook, Sisson Pond, Lawton Valley Reservoir. EPA’s file records it issued August 2, 2019 and expiring May 2, 2024.

RI AIRPORT CORP NEWPORT AIRPORT, Middletown, Rhode Island: Coverage under a general permit RIR50S001, held by RHODE ISLAND AIRPORT CORP.; Industrial stormwater; Administratively continued (past its expiration date and still in force until reissued); issued August 2, 2019, term to May 2, 2024, by RIDEM; discharges to Bailey Brook, Sisson Pond, Lawton Valley Reservoir.

Solids, total suspended: 12 limits, 45 violations of any kind, 0 effluent exceedances.
Oil & Grease: 12 limits, 44 violations of any kind, 0 effluent exceedances.
Enterococci: 12 limits, 23 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 12 limits, 20 violations of any kind, 0 effluent exceedances.
Lead, total [as Pb]: 12 limits, 19 violations of any kind, 0 effluent exceedances.

April 3, 2025: Failure to comply with recordkeeping requirements - industrial stormwater [40 CFR 122.41(j)] (ST6).

Rhode Island holds 370 Industrial stormwater coverages of this permit type in EPA’s file; 120 were issued before RIR50S001. RHODE ISLAND AIRPORT CORP. holds 5 permits in Rhode Island.

Other permits held by RHODE ISLAND AIRPORT CORP.

RI AIRPORT CORP QUONSET AIRPORT, North Kingstown: RIR50S002, issued August 2, 2019
WESTERLY AIRPORT STATE AIRPORT, Westerly: RIR50S003, issued August 2, 2019
BLOCK ISLAND AIRPORT, New Shoreham: RIR50S004, issued August 2, 2019
RI AIRPORT CORP NORTH CENTRAL ARPT, Smithfield: RIR50S005, issued August 2, 2019

Coverages issued nearest RIR50S001

August 2, 2019: POINT VIEW MARINA, Wakefield, RIR50Q026, held by Mazza Marina LLC
August 2, 2019: GREENWICH COVE MARINA, East Greenwich, RIR50Q028, held by IM 01 Prime LLC
August 2, 2019: EAST GREENWICH YACHT CLUB, East Greenwich, RIR50Q029
August 2, 2019: BLOUNT BOATS. INC., Warren, RIR50R014, held by BLOUNT BOATS, INC.
August 2, 2019: J. GOODISON COMPANY, INC., North Kingstown, RIR50R017, held by J. Goodison Company, Inc.
August 2, 2019: RI AIRPORT CORP QUONSET AIRPORT, North Kingstown, RIR50S002, held by RHODE ISLAND AIRPORT CORP.
August 2, 2019: WESTERLY AIRPORT STATE AIRPORT, Westerly, RIR50S003, held by RHODE ISLAND AIRPORT CORP.
August 2, 2019: BLOCK ISLAND AIRPORT, New Shoreham, RIR50S004, held by RHODE ISLAND AIRPORT CORP.
August 2, 2019: RI AIRPORT CORP NORTH CENTRAL ARPT, Smithfield, RIR50S005, held by RHODE ISLAND AIRPORT CORP.
August 2, 2019: ARMY AVIATION SUPPORT FACILITY, North Kingstown, RIR50S006, held by RHODE ISLAND ARMY NATIONAL GUARD

RI AIRPORT CORP NEWPORT AIRPORT among its neighbors

EPA’s permit file holds 5 discharge permits in the Aquidneck Island-Frontal Atlantic Ocean subwatershed (HUC 010900040911), RIR50S001 among them. Its county holds 51, 3 of them major permits; RIR50S001 is a minor permit.

Other permits in the Aquidneck Island-Frontal Atlantic Ocean subwatershed (HUC 010900040911)

PROPOSED REDEVELOPMENT, Middletown: RIR101913, minor permit, permit term to September 25, 2020
STA - MIDDLETOWN TERMINAL, Middletown: RIRNE0430, minor permit, permit term to October 25, 2029
TOWN OF MIDDLETOWN WWCS, Middletown: RIR040032, minor permit, permit term to December 19, 2008
TOWN OF MIDDLETOWN WWCS, Middletown: RISS00007, minor permit, permit term to December 31, 2100

Identity

Facility as filed	RI AIRPORT CORP NEWPORT AIRPORT
Permittee as filed	RHODE ISLAND AIRPORT CORP.
NPDES ID	RIR50S001
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	August 2, 2019
Expiration date	May 2, 2024
Issuing agency	RIDEM
Address	Middletown, RI 02842
Receiving water	Bailey Brook, Sisson Pond, Lawton Valley Reservoir
Receiving water impaired	303(D) Listed
Subwatershed	Aquidneck Island-Frontal Atlantic Ocean (HUC 010900040911)
Other EPA IDs (FRS)	RCRA handler RIR000015008

Effluent limits and exceedances

5Pollutants on file
5Under a numeric limit
5With a violation of any kind
0With 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
Solids, total suspended	12	45
Oil & Grease	12	44
Enterococci	12	23
Phosphorus, total [as P]	12	20
Lead, total [as Pb]	12	19

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES RIR50S001.

Inspections, violations and enforcement

1Single-event violations

Date	What EPA recorded	Agency
April 3, 2025	Failure to comply with recordkeeping requirements - industrial stormwater [40 CFR 122.41(j)]	ST6

Inspections

EPA’s inspection file holds no inspection for NPDES RIR50S001.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES RIR50S001.

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

This public-records page covers NPDES permit RIR50S001, held by RHODE ISLAND AIRPORT CORP. for RI AIRPORT CORP NEWPORT AIRPORT in Middletown, RI, with a status of administratively continued and a discharger class of 5. The facts list 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and show the permit as issued August 2, 2019 and expiring May 2, 2024.