Clean Water Act discharge permit · NPDES RIR50D005
NARRAGANSETT IMPROVEMENT COMPANY, Providence, RI: NPDES RIR50D005 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
NARRAGANSETT IMPROVEMENT COMPANY, held by Narragansett Improvement Company, holds NPDES permit RIR50D005. EPA’s file records it issued March 9, 2020 and expiring May 2, 2024. 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 | NARRAGANSETT IMPROVEMENT COMPANY |
|---|---|
| Permittee as filed | Narragansett Improvement Company |
| NPDES ID | RIR50D005 |
| 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 | March 9, 2020 |
| Expiration date | May 2, 2024 |
| Issuing agency | RIDEM |
| Address | Providence, RI 02903 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Seekonk River-Providence River (HUC 010900040901) |
| NAICS | 324121 – Asphalt Paving Mixture and Block Manufacturing |
| SIC | 2951 – Asphalt Paving Mixtures And Blocks |
| Other EPA IDs (FRS) | RCRA handler RID006807911; ICIS-AIR source RI0000004400700038 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 5Pollutants on file
- 4Under a numeric limit
- 5With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 55 | 8 | December 31, 2025 | 21,433% over the limit |
| Oil & Grease | 6 | 50 | 1 | June 30, 2025 | 3% over the limit |
| Nitrogen, total [as N] | 6 | 26 | 0 | ||
| Coliform, fecal general | 6 | 26 | 0 | ||
| pH | 0 | 22 | 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 |
|---|---|---|
| October 16, 2025 | Failure to properly install, initiate, or fully implement industrial stormwater controls | ST6 |
| March 20, 2025 | Failure to comply with industrial stormwater requirement - numeric or narrative effluent violation | 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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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 RIR50D005 there.
Nearby on the register
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- Every permit record in Providence, A to Z
- Discharge permits in Rhode Island
- Every permit record in Rhode Island, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.