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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Rhode Island

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20 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

20 results

CompareNameNative sizeYear
FIELDS POINT WWTFProvidence45.5 MGD (million gallons per day)2022
BUCKLIN PT STPEast Providence23.7 MGD (million gallons per day)2022
Cranston WPCFCranston20.2 MGD (million gallons per day)2022
WOONSOCKET REGIONAL WWTFWoonsocket16 MGD (million gallons per day)2022
East Providence WPCFRiverside14.2 MGD (million gallons per day)2022
NEWPORT WWTFNewport10.7 MGD (million gallons per day)2022
West Warwick WWTFWest Warwick7.89 MGD (million gallons per day)2022
WARWICK WWTFWarwick7.7 MGD (million gallons per day)2022
SOUTH KINGSTOWN REG STPNarragansett5 MGD (million gallons per day)2022
BRISTOL WWTFBristol3.8 MGD (million gallons per day)2022
Smithfield Sewer AuthoritySmithfield3.5 MGD (million gallons per day)2022
Westerly WWTFWesterly2.5 MGD (million gallons per day)2022
WARREN WWTFWarren2.01 MGD (million gallons per day)2022
QUONSET POINT WWTFNorth Kingstown1.78 MGD (million gallons per day)2022
Burrillville Sewer CommissionOakland1.5 MGD (million gallons per day)2022
NARRAGANSETT SCARBOROUGHNarragansett1.4 MGD (million gallons per day)2022
EAST GREENWICH STPEast Greenwich1.25 MGD (million gallons per day)2022
Jamestown WWTFJamestown0.75 MGD (million gallons per day)2022
New Shoreham WWTFBlock Island0.3 MGD (million gallons per day)2022
ZAMBARANO HOSPITALPascoag0.12 MGD (million gallons per day)2022

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

  • Permit identifier and permitting authority: EPA or an authorized state.
  • Outfall and receiving water; sewer connections follow a different control route.
  • Current permit conditions, limits and dated measurements; these are not included in CWNS.

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.