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Non-Transient Non-Community Water System · PWS RI2980458

Tiverton Four Corners

Adamsville, Rhode Island 02801 - drinking water served from groundwater sources to 297 people, tracked in EPA SDWIS and UCMR5.

297
People served
216
EPA violations
12
Health-based
Untested
UCMR5 result

The verdict

EPA records 216 drinking-water violations at Tiverton Four Corners, 6% of them health-based - above the Rhode Island per-system average.

216
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
297
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tiverton Four Corners

Tiverton Four Corners is a private-owned non-transient non-community water system that delivers drinking water to 297 residents in Adamsville, Rhode Island (Newport County) through 13 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 216 total violations for this system , of which 12 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 204 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 13 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Rhode Island, EPA tracks 463 public water systems serving 1,159,492 people, with 33,766 cumulative violations and 8,949 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 72.9 violations. Statewide, 15 of 29 UCMR5-tested systems have reported PFAS detections (51.7%).

Tiverton Four Corners's 216 violations sit above the Rhode Island average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
297
Total Violations
216
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
13
County
Newport
School/Daycare
No
MCL Violations
12
Monitoring Violations
204
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 13 2015
Coliform (TCR) MCL 12 2015
Lead and Copper Rule MR 8 2018
Chromium MR 6 2023
trans-1,2-Dichloroethylene MR 3 2014
1,1,1-Trichloroethane MR 3 2014
Trichloroethylene MR 3 2014
1,1,2-Trichloroethane MR 3 2014
CHLOROBENZENE MR 3 2014
Toluene MR 3 2014
Ethylbenzene MR 3 2014
BHC-GAMMA MR 3 2014
Methoxychlor MR 3 2014
Toxaphene MR 3 2014
Di(2-ethylhexyl) adipate MR 3 2014
Simazine MR 3 2014
Di(2-ethylhexyl) phthalate MR 3 2014
Picloram MR 3 2014
Dinoseb MR 3 2014
Aldicarb sulfone MR 3 2014
Carbofuran MR 3 2014
LASSO MR 3 2014
2,4-D MR 3 2014
2,4,5-TP MR 3 2014
HEXACHLOROBENZENE MR 3 2014
Benzo(a)pyrene MR 3 2014
ETHYLENE DIBROMIDE MR 3 2014
o-Dichlorobenzene MR 3 2014
Cadmium MR 3 2014
Antimony, Total MR 3 2014

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Tiverton Four Corners.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID RI2980458 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Rhode Island Drinking Water Authority

Rhode Island's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find RI regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 Chromium MR 6 SDWIS / RI2980458 / 1020
2018 Lead and Copper Rule MR 8 SDWIS / RI2980458 / 5000
2015 Coliform (TCR) MR 13 SDWIS / RI2980458 / 3100
2015 Coliform (TCR) MCL 12 SDWIS / RI2980458 / 3100
2014 trans-1,2-Dichloroethylene MR 3 SDWIS / RI2980458 / 2979
2014 1,1,1-Trichloroethane MR 3 SDWIS / RI2980458 / 2981
2014 Trichloroethylene MR 3 SDWIS / RI2980458 / 2984
2014 1,1,2-Trichloroethane MR 3 SDWIS / RI2980458 / 2985
2014 CHLOROBENZENE MR 3 SDWIS / RI2980458 / 2989
2014 Toluene MR 3 SDWIS / RI2980458 / 2991
2014 Ethylbenzene MR 3 SDWIS / RI2980458 / 2992
2014 BHC-GAMMA MR 3 SDWIS / RI2980458 / 2010
2014 Methoxychlor MR 3 SDWIS / RI2980458 / 2015
2014 Toxaphene MR 3 SDWIS / RI2980458 / 2020
2014 Di(2-ethylhexyl) adipate MR 3 SDWIS / RI2980458 / 2035

How Tiverton Four Corners Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Tiverton Four Corners Rhode Island avg Federal benchmark
Total violations 216 72.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 19.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 51.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 297 2,504 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 463 regulated public water systems in Rhode Island.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Tiverton Four Corners water safe to drink? ▼
Tiverton Four Corners (PWS ID: RI2980458) has 216 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 297 people using Groundwater sources.
How many people does Tiverton Four Corners serve? ▼
Tiverton Four Corners serves 297 people in Adamsville, Rhode Island. It is a Private-owned system using Groundwater water sources with 13 service connections.
What type of violations does Tiverton Four Corners have? ▼
Tiverton Four Corners has 216 total violations: 12 health-based violations (MCL exceedances or treatment failures), 204 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tiverton Four Corners water? ▼
No PFAS testing data is available for Tiverton Four Corners under the EPA's UCMR5 monitoring program.
What water source does Tiverton Four Corners use? ▼
Tiverton Four Corners uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.