Clean Water Act discharge permit · NPDES RI0100188
SCARBOROUGH WWTF, Narragansett, RI: NPDES RI0100188 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
SCARBOROUGH WWTF, held by TOWN OF NARRAGANSETT, holds NPDES permit RI0100188, which discharges to Rhode Island Sound. EPA’s file records it issued August 30, 2017 and expiring September 30, 2022. 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 | SCARBOROUGH WWTF |
|---|---|
| Permittee as filed | TOWN OF NARRAGANSETT |
| NPDES ID | RI0100188 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 30, 2017 |
| Expiration date | September 30, 2022 |
| Address | Narragansett, RI 02882 |
| Receiving water | RHODE ISLAND SOUND |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 60Pollutants on file
- 25Under a numeric limit
- 59With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 10 | 37 | 21 | October 31, 2025 | 468% over the limit |
| Solids, total suspended | 10 | 44 | 20 | October 31, 2025 | 150% over the limit |
| Cyanide, total [as CN] | 2 | 16 | 6 | April 30, 2002 | 50% over the limit |
| BOD, 5-day, percent removal | 1 | 7 | 5 | October 31, 2025 | 230% over the limit |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 8 | 4 | September 30, 2025 | 84% over the limit |
| Enterococci | 2 | 4 | 4 | August 31, 2025 | 99,999% over the limit |
| Solids, suspended percent removal | 1 | 5 | 3 | August 31, 2025 | 50% over the limit |
| pH | 2 | 6 | 2 | October 31, 2007 | |
| Coliform, fecal general | 2 | 6 | 0 | ||
| Solids, settleable | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Chlorine, total residual | 2 | 4 | 0 | ||
| Oil & Grease | 1 | 3 | 0 | ||
| Cadmium, total [as Cd] | 2 | 2 | 0 | ||
| Copper, total [as Cu] | 2 | 2 | 0 | ||
| Lead, total [as Pb] | 2 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Zinc, total [as Zn] | 2 | 2 | 0 | ||
| Aluminum, total [as Al] | 2 | 2 | 0 | ||
| Cyanide, free available | 2 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 0 | 2 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 0 | 2 | 0 | ||
| Perfluorononanoic acid (PFNA) | 0 | 2 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 0 | 2 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 0 | 2 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 0 | 2 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 0 | 2 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 0 | 2 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 0 | 2 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 0 | 2 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 0 | 2 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 0 | 2 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 0 | 2 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 0 | 2 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 0 | 2 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 0 | 2 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 0 | 2 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 0 | 2 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 0 | 2 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 0 | 2 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 0 | 2 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 0 | 2 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 0 | 2 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 0 | 2 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 0 | 2 | 0 | ||
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | 0 | 2 | 0 | ||
| Perfluoro-3-methoxypropanoic acid (PFMPA) | 0 | 2 | 0 | ||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | 0 | 2 | 0 | ||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | 0 | 2 | 0 | ||
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | 0 | 2 | 0 | ||
| Perfluoro-4-methoxybutanoic acid (PFMBA) | 0 | 2 | 0 | ||
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | 0 | 2 | 0 | ||
| Nitrogen, total [as N] | 1 | 1 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 1 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 1 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 0 | 1 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 0 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 27, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| August 27, 2025 | Management Practice Violations - Improper Operation and Maintenance | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.