Community Water System · PWS VI0000443
Water And Power Authority - STT
Christiansted, US Virgin Islands 00823 - drinking water served from surface water sources to 34,000 people, tracked in EPA SDWIS and UCMR5.
- 34,000
- People served
- 9
- EPA violations
- 1
- Health-based
- No PFAS
- UCMR5 result
The verdict
EPA records 9 drinking-water violations at Water And Power Authority - STT, 11% of them health-based - above the US Virgin Islands per-system average.
- 9
- Total EPA violations on record
- 11%
- Health-based (MCL / treatment failure)
- 34,000
- People served by this system
- 0
- PFAS compounds detected (UCMR5)
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. Statewide, 1 of 3 UCMR5-tested systems have reported PFAS detections (33.3%).
Water And Power Authority - STT's 9 violations sit above the US Virgin Islands average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
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 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFDA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 6/24/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFOA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 6/24/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| ADONA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 6/24/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFOS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NEtFOSAA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 6/24/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFPeA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/12/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 3/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 3/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 3/12/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 3/12/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| 8:2 FTS | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 3/12/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 3/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 3/12/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 4:2 FTS | 3/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 3/12/2024 | <3.00 ppt | 3.00 ppt | 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.
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 SDWISSource: EPA SDWIS Federal Reports Search
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 SDWISViolation 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 (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 Water And Power Authority - STT water safe to drink? ▼
How many people does Water And Power Authority - STT serve? ▼
What type of violations does Water And Power Authority - STT have? ▼
Has PFAS been detected in Water And Power Authority - STT water? ▼
What water source does Water And Power Authority - STT use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
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.