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Water And Power Authority - STT

PWS ID: VI0000443 · Christiansted, US Virgin Islands 00823

Water And Power Authority - STT serves 34,000 people in Christiansted, US Virgin Islands using Surface Water water sources. It has 9 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: Water And Power Authority - STT

Water And Power Authority - STT is a state-owned community water system that delivers drinking water to 34,000 residents in Christiansted, US Virgin Islands (St. Thomas Island County) through 1 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 9 total violations for this system , of which 1 (11%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 5 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 3 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across US Virgin Islands, EPA tracks 256 public water systems serving 122,604 people, with 1,317 cumulative violations and 236 health-based violations on record. About 84% of systems in the state carry at least one violation, and state-wide the average per system is 5.1 violations. Water And Power Authority - STT's 9 violations sit above the US Virgin Islands average. Statewide, 1 of 3 UCMR5-tested systems have reported PFAS detections (33.3%). 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
34,000
Total Violations
9
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
State
Connections
1
County
St. Thomas Island
School/Daycare
No
MCL Violations
0
Monitoring Violations
5
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 3 1992
LEAD AND COPPER RULE REVISIONS TT 1 2024
Combined Radium (-226 and -228) MR 1 1980
Gross Alpha, Excl. Radon and U MR 1 1980
LEAD AND COPPER RULE REVISIONS RPT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
lithium 9/26/2023 <9 µg/L 9 µg/L Not Detected
PFDA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 6/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 6/24/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFOA 6/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 6/24/2024 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 6/24/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFOS 6/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 6/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 6/24/2024 <0.002 µg/L 0.002 µg/L Not Detected
6:2 FTS 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 6/24/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFPeA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 6/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 6/24/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 6/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 6/10/2024 <9 µg/L 9 µg/L Not Detected
PFPeA 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 3/12/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 3/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 3/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 3/12/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 3/12/2024 <0.008 µg/L 0.008 µg/L Not Detected
8:2 FTS 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 3/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 3/12/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 3/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 3/12/2024 <0.006 µg/L 0.006 µg/L Not Detected

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 Water And Power Authority - STT.

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 VI0000443 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

US Virgin Islands Drinking Water Authority

US Virgin Islands'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 VI 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
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / VI0000443 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / VI0000443 / 5200
1992 Lead and Copper Rule MR 3 SDWIS / VI0000443 / 5000
1980 Combined Radium (-226 and -228) MR 1 SDWIS / VI0000443 / 4010
1980 Gross Alpha, Excl. Radon and U MR 1 SDWIS / VI0000443 / 4000

How Water And Power Authority - STT Compares

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

Metric Water And Power Authority - STT US Virgin Islands avg Federal benchmark
Total violations 9 5.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 0.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 34,000 479 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 256 regulated public water systems in US Virgin Islands.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Water And Power Authority - STT water safe to drink? ▼
Water And Power Authority - STT (PWS ID: VI0000443) has 9 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 34,000 people using Surface Water sources.
How many people does Water And Power Authority - STT serve? ▼
Water And Power Authority - STT serves 34,000 people in Christiansted, US Virgin Islands. It is a State-owned system using Surface Water water sources with 1 service connections.
What type of violations does Water And Power Authority - STT have? ▼
Water And Power Authority - STT has 9 total violations: 1 health-based violations (MCL exceedances or treatment failures), 5 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Water And Power Authority - STT water? ▼
No. Water And Power Authority - STT was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Water And Power Authority - STT use? ▼
Water And Power Authority - STT uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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