Smithfield Wastewater Treatment Plant
20 Esmond Mill Dr, Smithfield, RI 02917 · Providence County · Publicly Owned Treatment Works
- Average flow
- 1.64 MGD
- Design flow
- 3.5 MGD
- NPDES permit
- RI0100251
- Administratively continued
- Permit expires
- June 2026
- Population served
- 14,000
- CWNS 2022
Smithfield Wastewater Treatment Plant is a publicly owned wastewater treatment works in Smithfield, Providence County, Rhode Island treating an average of 1.64 million gallons per day against a permitted design capacity of 3.5 MGD, serving about 14,000 residents. It discharges under NPDES permit RI0100251 (administratively continued), which expires in June 2026, with 3 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in February 2007.
Treatment technology
One treatment structure or unit process identified at Smithfield Wastewater Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Smithfield Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Smithfield Wastewater Treatment Plant in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $50,000
- required by EPA orders
- EPA inspections
- 1
- latest Sep 2009
Latest case · Feb 2007
SMITHFIELD SEWER AUTHORITY
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $50,000
Source: EPA ECHO, civil enforcement case 01-2007-2010.
Full case history with a free Klarifi account
Every action against Smithfield Wastewater Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Smithfield
Smithfield's capital improvement plan lists 31 water, sewer and wastewater line items worth $33M starting 2025–2044. The largest budgeted items are shown here.
All water and sewer capital projects in Smithfield →
| Project | Budget | Years |
|---|---|---|
| Harris Road Water Main Installation | $5,200,000 | 2030–2031 |
| GWH Water Main Installation | $4,200,000 | 2025–2028 |
| Joint Wholesale Water Supply with the Greenville Water District | $3,250,000 | 2037–2038 |
| Water Main Installation - Rte. 116 | $3,200,000 | 2035–2036 |
| SSES Program (Sanitary Sewer Evaluation Studies) | $2,295,000 | 2025–2044 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
21 verified contacts for Smithfield Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 21 verified contacts (18 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Smithfield Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Rhode Island
East Providence (rumford) · 7 mi away
17.77 MGD
Cranston · 9 mi away
7.48 MGD
East Providence · 10 mi away
5.45 MGD
Burrillville · 10 mi away
0.86 MGD
Warren · 15 mi away
1.78 MGD
East Greenwich · 15 mi away
0.82 MGD
Bristol · 19 mi away
3.17 MGD
North Kingstown · 20 mi away
0.6 MGD
Smithfield Wastewater Treatment Plant: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated May 25, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms