Rhode Island water quality
Rhode Island has 452 active public water systems (1,140 on file total), 92 of them graded by TapGraded.
Grade distribution
Biggest water systems
PROVIDENCE-CITY OF
PROVIDENCE, RI · 333,142 served
PAWTUCKET WATER SUPPLY BOARD VEOLIA-NA
PAWTUCKET, RI · 98,130 served
KENT COUNTY WATER AUTHORITY
WEST GREENWICH, RI · 94,107 served
WARWICK-CITY OF
WARWICK, RI · 73,289 served
BRISTOL COUNTY WATER AUTHORITY
WARREN, RI · 49,000 served
EAST PROVIDENCE-CITY OF
EAST PROVIDENCE, RI · 47,618 served
WOONSOCKET WATER DIVISION
WOONSOCKET, RI · 45,828 served
NEWPORT-CITY OF
NEWPORT, RI · 42,155 served
WESTERLY WATER DEPARTMENT
WESTERLY, RI · 35,298 served
NORTH KINGSTOWN TOWN OF
NORTH KINGSTOWN, RI · 27,732 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
WOONSOCKET WATER DIVISION
WOONSOCKET, RI · 45,828 served
WESTERLY WATER DEPARTMENT
WESTERLY, RI · 35,298 served
UNIVERSITY OF RHODE ISLAND
KINGSTON, RI · 19,354 served
PORTSMOUTH WATER & FIRE DISTRICT
PORTSMOUTH, RI · 17,090 served
VEOLIA WATER WAKEFIELD RHODE ISLAND INC
WAKEFIELD, RI · 22,347 served
CUMBERLAND, TOWN OF
CUMBERLAND, RI · 21,235 served
KENT COUNTY WATER AUTHORITY
WEST GREENWICH, RI · 94,107 served
NORTH KINGSTOWN TOWN OF
NORTH KINGSTOWN, RI · 27,732 served
NEWPORT-CITY OF
NEWPORT, RI · 42,155 served
WARWICK-CITY OF
WARWICK, RI · 73,289 served
Cities in Rhode Island
Source: EPA SDWIS/ECHO · Data as of 2026Q2