State profile · EPA SDWIS + UCMR5
US Virgin Islands Drinking Water Quality
256 SDWIS-listed public water systems serve 122,604 people across US Virgin Islands. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 256
- SDWIS water systems
- 1,317
- Total violations
- 83.6%
- SDWIS systems w/ a violation
- 33.3%
- UCMR5 PFAS rate (3 tested)
The verdict
122,604 people served via SDWIS-listed systems - smaller served population (≤ 1,083,630). According to EPA SDWIS population served, US Virgin Islands ranks #60 of 66 states and territories by people served through public water systems.
- #60 of 66
- Population · states corpus
- 1,317
- Total EPA violations on record
- 18%
- Health-based (MCL / treatment)
- 83.6%
- SDWIS systems with ≥1 violation
SDWIS violation % and UCMR5 PFAS % use different denominators (full inventory vs tested subset). Population ordinal uses SDWIS population served.
US Virgin Islands standing, low SDWIS violation-rate third
US Virgin Islands is in the lower third of jurisdictions by violation rate (83.6%; lower-third rate (≤ 92.5%)). That is a relative placement among peers, not a claim that most systems are clean - 214 of 256 still carry ≥1 record. Population served is smaller (122,604; smaller served population (≤ 1,083,630)), so a high rate can still mean a compact household footprint. Health-based share is 18% - a material slice is exposure-relevant, with the rest monitoring or reporting. UCMR5 PFAS detection is 33.3% on the tested subset (mid UCMR5 detection (≤ 35.3%)) - a different denominator from the SDWIS violation rate. Systems listed below are ranked by population served or violation count; pair rate with inventory size before reading exposure scale.
Nationwide similar states
Nearest by SDWIS violation rate
Health-based share of this violation record
EPA SDWIS classifications for US Virgin Islands's 1,317 recorded violations.
US Virgin Islands vs nearest violation-rate peers
Share of SDWIS-listed systems with at least one recorded violation; peers are nearest by absolute rate distance, not a fixed top-seven list.
- VI
US Virgin Islands
83.6 % of systems
- MI
Michigan
86.1 % of systems
- IL
Illinois
80.8 % of systems
- 04
EPA Region 4 — Tribal Water Systems
86.7 % of systems
- HI
Hawaii
80.3 % of systems
What this shows US Virgin Islands's rate is 83.6% (214 of 256 systems; lower-third rate (≤ 92.5%)). This is a comparison of recorded SDWIS violations, not a measure of current water safety.
US Virgin Islands vs all jurisdictions by SDWIS system inventory
Where this state's public water system count sits among every state and territory on PlainWater
256 52nd of 66 higher than 14 of 66 jurisdictions
States and territories, banded by SDWIS-listed public water system count
Each bar is a band; taller bars hold more jurisdictions. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS state aggregates · 2026-05-15
Largest Water Systems
Most Violations
Counties in US Virgin Islands
Context: Check your water system · methodology · all states
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on 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.