Clean Water Act discharge permit · NPDES RI0100251
SMITHFIELD WASTEWATER TREATMENT PLANT, Smithfield, RI: NPDES RI0100251 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 15Pollutants with an effluent exceedance
SMITHFIELD WASTEWATER TREATMENT PLANT, held by SMITHFIELD TOWN HALL, holds NPDES permit RI0100251, which discharges to Woonasquatucket River. EPA’s file records it issued September 27, 2013 and expiring October 31, 2018. 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 | SMITHFIELD WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | SMITHFIELD TOWN HALL |
| NPDES ID | RI0100251 |
| 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 | September 27, 2013 |
| Expiration date | October 31, 2018 |
| Address | Smithfield, RI 02917 |
| Receiving water | WOONASQUATUCKET RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Woonasquatucket River (HUC 010900040502) |
| Other EPA IDs (FRS) | RCRA handler RIR000508812 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 31Pollutants on file
- 28Under a numeric limit
- 29With a violation of any kind
- 15With 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 | 20 | 108 | 34 | September 30, 2021 | 680% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 20 | 114 | 32 | September 30, 2005 | 264% over the limit |
| Coliform, fecal general | 3 | 44 | 19 | March 31, 2012 | 5,999,900% over the limit |
| Zinc, total [as Zn] | 6 | 36 | 12 | April 30, 2011 | 75% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 23 | 9 | May 31, 2016 | 578% over the limit |
| Chlorine, total residual | 2 | 19 | 9 | March 31, 2010 | 2,379% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 10 | 8 | September 30, 2024 | 88% over the limit |
| Nitrogen, total [as N] | 6 | 13 | 5 | May 31, 2016 | 30% over the limit |
| Lead, total [as Pb] | 4 | 57 | 2 | July 31, 2021 | 20% over the limit |
| Copper, total [as Cu] | 2 | 18 | 2 | July 31, 2002 | 45% over the limit |
| Phosphorus, total [as P] | 6 | 9 | 2 | September 30, 2013 | 60% over the limit |
| Cyanide, total [as CN] | 4 | 8 | 2 | December 31, 2011 | 250% over the limit |
| Cadmium, total [as Cd] | 4 | 60 | 1 | May 31, 2005 | 235% over the limit |
| pH | 2 | 13 | 1 | April 30, 2015 | |
| Chloroform | 0 | 1 | 1 | June 30, 2026 | 30% over the limit |
| Enterococci | 4 | 48 | 0 | ||
| Nitrogen, nitrite total [as N] | 4 | 28 | 0 | ||
| Solids, settleable | 2 | 19 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 18 | 0 | ||
| Silver, total [as Ag] | 0 | 16 | 0 | ||
| Nitrogen, nitrate total [as N] | 4 | 11 | 0 | ||
| BOD, carbonaceous, percent removal | 1 | 9 | 0 | ||
| Iron, total [as Fe] | 2 | 6 | 0 | ||
| Oil & Grease | 1 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 5 | 0 | ||
| Solids, suspended percent removal | 1 | 5 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 5 | 0 | ||
| Phosphorous, in total orthophosphate | 2 | 4 | 0 | ||
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 1, 2025 | Failure of the Control Authority to maintain records for the past three years (Level II - Other) | 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 RI0100251 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.