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Counties → US Virgin Islands

St. Thomas Island County, US Virgin Islands

Water Systems
112
Population Served
58,003
Total Violations
416
81 health-based
PFAS Detected
1
of 2 tested

Violation Analysis

74.1%
Systems with Violations
3.7
Avg Violations per System
19.5%
Health-Based Violations

Water Source Types

GW
45 systems (40%)
SW
4 systems (4%)
Unknown
1 system (1%)

PFAS Contamination

2
Systems Tested
1
PFAS Detected
50.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

St. Thomas Island US Virgin Islands water systems by violation status, EPA SDWIS records.

No violations on record (10) One or more violations (40)

Violation history is cumulative — many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Water And Power Authority - STT 34,000 9 Clean
VI Port Authority (Airport) 2,500 4 —
Cinema One Market Square East 1,035 0 —
Ivanna Eudora Kean High 1,000 13 —
Charlotte Amalie High 978 12 —
Bovoni Housing Project I and II 960 13 —
UVI St.Thomas 900 7 —
West Indian Company 880 7 —
Tutu Park Mall 800 2 —
Food Center 765 2 —
Westin St. Thomas 750 0 —
Ritz Carlton 741 8 —
Knud Hansen Complex 600 13 —
Nisky Center 550 4 Detected
Antilles School- Gym 540 4 —
Lovenlund Apartments 510 2 —
Coral World 499 5 —
Yvonne Bowski Elem. 440 0 —
Sapphire Bch Resort and Marina 400 2 —
American Yacht Harbor 400 2 —
Mountain Top 325 0 —
Windward Passage-Holiday Inn 306 2 —
Joseph Sibily Elem-cafe 303 10 —
Cowpet Bay Village-West 300 12 —
Blue Beards Castle West 300 10 —
Magens Bay Beach Concession 300 5 —
Blue Beards Castle North 300 2 —
Weslyan Academy School 295 8 —
Point Pleasant Resort 273 5 —
Redhook Shopping Center 250 0 —
St. Thomas Skyride 250 0 —
Bolongo Hotel West #13 247 6 —
Sapphire Vill.condos (West) 225 2 —
Plaza at Havensight 215 0 —
Hull Bay Hideaway Restaurant 200 2 —
Elysian Beach Resort 197 2 —
Emerald Beach Resort I 195 4 —
Secret Harbor Beach Resort 180 2 —
Sibs Mountain Top Bar 179 0 —
R. Wheatley Skills Center 156 10 —
Old Stone Farmhouse 150 0 —
Al Cohens Plaza B-2 135 0 —
Watergate East - Bldg. 15,16,17 133 6 —
VI National Guard Armory - STT 130 2 —
St. Thomas Healthcare Management 128 2 —
Cowpet Bay Village-East 120 12 —
VI Montessori School 1 110 9 —
Dorthea Condo 110 3 —
Watergate East - Bldg. 14 107 5 —
Burnett Towers 100 10 —

Other Counties in US Virgin Islands

St. Croix Island County
131 systems · 61,668 served · 878 violations
St. John Island County
10 systems · 2,228 served · 22 violations

Drinking Water Guides

Is Your Tap Water Safe?

How to interpret water quality reports and know when to take action.
PFAS: What You Need to Know

Health risks, EPA standards, and how to reduce PFAS exposure.
Check Your Water System

Step-by-step guide to finding and understanding your local water data.

Related Environmental Data

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Climate and weather patterns impacting water supply

Frequently Asked Questions

How many water violations are in St. Thomas Island County? ▼
St. Thomas Island County has 416 total drinking water violations across 112 water systems, of which 81 are health-based violations. 74.1% of systems have at least one violation.
How many people get water from St. Thomas Island County systems? ▼
Water systems in St. Thomas Island County serve approximately 58,003 people through 112 public water systems.
Has PFAS been detected in St. Thomas Island County water? ▼
Of 2 water systems tested for PFAS in St. Thomas Island County, 1 had PFAS detected (50.0% detection rate).
What types of water sources supply St. Thomas Island County? ▼
Water systems in St. Thomas Island County use GW (45 systems), SW (4 systems), Unknown (1 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 19.5% of St. Thomas Island County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Where does this water quality data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and UCMR5 PFAS monitoring program. SDWIS tracks violations for all public water systems regulated under the Safe Drinking Water Act.

Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial