EPA data as of Oct 2026 · page updated 2026-10-30
Rhode Island: drinking water & radon
Rhode Island has 93 active community water systems. Since 2016, 31 reported health-based violations; 7 had a latest lead result above 15 ppb; 10 measured PFOA or PFOS at or above 4 ppt.
Water systems93
With violations31
Radon zone 1 ZIPs31
ZIPs likely on wells19
Radon zones in Rhode Island
tap a countyZone 1 · highestZone 2 · moderateZone 3 · low
Most health-based violations
| Narragansett Water System-Point Judith 8,210 people | 14 |
| Canonchet Cliffs Water Association INC. 154 people | 9 |
| Foster Senior Housing INC. 31 people | 9 |
| Telemark Village 82 people | 9 |
| Narragansett Water Dept-North END 4,432 people | 8 |
| Veolia Water Wakefield Rhode Island INC 21,225 people | 6 |
| Slatersville Public Supply 3,403 people | 4 |
| Cne - New London Turnpike Entry Point 9,999 people | 3 |
| Portsmouth Water & Fire District 17,090 people | 3 |
| Hillsdale Housing Cooperative, INC. 170 people | 3 |
Highest latest lead (90th percentile)
| Ladd Center Water System 129 people | 64 ppb |
| Echo Lake Water District 160 people | 21 ppb |
| Exeter Job Corps Center 300 people | 18.8 ppb |
| White Lake Estates 250 people | 18 ppb |
| Lake Forest Health and Rehabilitation 268 people | 17 ppb |
| Eleanor Slater Hospital Zambarano Unit 270 people | 16 ppb |
| Naval Station, Newport 7,870 people | 7.7 ppb |
| Pine Acres ALR 75 people | 7.4 ppb |
| Woonsocket Water Division 45,828 people | 6.6 ppb |
| University of Rhode Island 19,354 people | 6.4 ppb |
Highest PFOA / PFOS
| University of Rhode Island 19,354 people | 16 ppt |
| Westerly Water Department 35,298 people | 9 ppt |
| Town of North Kingstown 27,732 people | 8.1 ppt |
| Town of Cumberland 21,235 people | 7.7 ppt |
| Kent County Water Authority 94,107 people | 7.5 ppt |
| Kingston Water District 3,968 people | 6.2 ppt |
| South Kingstown-South Shore 6,170 people | 6.1 ppt |
| Woonsocket Water Division 45,828 people | 5.8 ppt |
| North Tiverton Fire District 8,969 people | 5.1 ppt |
| Narragansett Water Dept-North END 4,432 people | 4.3 ppt |
Largest systems
| Providence-City of 333,142 people | 333,142 |
| Pawtucket Water Supply Board Veolia-Na 98,130 people | 98,130 |
| Kent County Water Authority 94,107 people | 94,107 |
| Warwick-City of 73,289 people | 73,289 |
| Bristol County Water Authority 49,000 people | 49,000 |
| East Providence-City of 47,961 people | 47,961 |
| Woonsocket Water Division 45,828 people | 45,828 |
| Newport-City of 42,155 people | 42,155 |
| Westerly Water Department 35,298 people | 35,298 |
| Town of North Kingstown 27,732 people | 27,732 |
All ZIP codes in Rhode Island
88 ZIP codes.
02801Adamsville02804Ashaway02806Barrington02807Block Island02808Bradford02809Bristol02812Carolina02813Charlestown02814Chepachet02815Clayville02816Coventry02817West Greenwich02818East Greenwich02822Exeter02823Fiskeville02824Forestdale02825Foster02826Glendale02827Greene02828Greenville02829Harmony02830Harrisville02831Hope02832Hope Valley02833Hopkinton02835Jamestown02836Kenyon02837Little Compton02838Manville02839Mapleville02840Newport02841Newport02842Middletown02852North Kingstown02857North Scituate02858Oakland02859Pascoag02860Pawtucket02861Pawtucket02862Pawtucket02863Central Falls02864Cumberland02865Lincoln02871Portsmouth02872Prudence Island02873Rockville02874Saunderstown02875Shannock02876Slatersville02878Tiverton02879Wakefield02880Wakefield02881Kingston02882Narragansett02883Peace Dale02885Warren02886Warwick02887Warwick02888Warwick02889Warwick02891Westerly02892West Kingston02893West Warwick02894Wood River Junction02895Woonsocket02896North Smithfield02898Wyoming02901Providence02902Providence02903Providence02904Providence02905Providence02906Providence02907Providence02908Providence02909Providence02910Cranston02911North Providence02912Providence02914East Providence02915Riverside02916Rumford02917Smithfield02918Providence02919Johnston02920Cranston02921Cranston02940Providence
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
How many water systems in Rhode Island have violations?
31 of 93 active community water systems in Rhode Island reported at least one health-based violation since 2016 (EPA SDWIS).
What is the radon risk in Rhode Island?
31 ZIP codes are in EPA radon zone 1 (highest potential), 54 in zone 2 and 3 in zone 3. EPA recommends testing every home.