Non-Transient Non-Community Water System · PWS VI1000037
Nisky Center
US Virgin Islands - drinking water served from groundwater sources to 550 people, tracked in EPA SDWIS and UCMR5.
- 550
- People served
- 4
- EPA violations
- 1
- Health-based
- 4 PFAS
- UCMR5 result
The verdict
EPA records 4 drinking-water violations at Nisky Center, 25% of them health-based - below the US Virgin Islands per-system average, and UCMR5 testing detected 4 PFAS compounds.
- 4
- Total EPA violations on record
- 25%
- Health-based (MCL / treatment failure)
- 550
- People served by this system
- 4
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Nisky Center
Nisky Center is a private-owned non-transient non-community water system that delivers drinking water to 550 residents in US Virgin Islands (St. Thomas Island County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 4 total violations for this system , of which 1 (25%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is LEAD AND COPPER RULE REVISIONS, recorded in 1 violation (RPT). Under EPA's UCMR5 PFAS monitoring program, 4 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 12 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.
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%).
Nisky Center's 4 violations sit below 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.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- St. Thomas Island
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFPeS | 7/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 7/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 7/24/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHpS | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 7/24/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 7/24/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 7/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/24/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 6:2 FTS | 7/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 7/24/2024 | 5.20 ppt | 4.00 ppt | Detected |
| PFDA | 7/24/2024 | 3.20 ppt | 3.00 ppt | Detected |
| PFDoA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 7/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 7/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 7/24/2024 | 12.00 ppt | 5.00 ppt | Detected |
| HFPO-DA | 7/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxA | 7/24/2024 | 3.70 ppt | 3.00 ppt | Detected |
| ADONA | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 12/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 12/17/2024 | 5.20 ppt | 5.00 ppt | Detected |
| 6:2 FTS | 12/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 12/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 12/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 12/17/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 12/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 12/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDoA | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 12/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 12/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 12/17/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFUnA | 12/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFTrDA | 12/17/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 12/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 12/17/2024 | <6.00 ppt | 6.00 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 Nisky Center.
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 VI1000037 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 | RPT | 1 | SDWIS / VI1000037 / 5200 |
| 2024 | LEAD AND COPPER RULE REVISIONS | TT | 1 | SDWIS / VI1000037 / 5200 |
How Nisky Center Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Nisky Center | US Virgin Islands avg | Federal benchmark |
|---|---|---|---|
| Total violations | 4 | 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 | 4 compounds | 33.3% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 550 | 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 Nisky Center water safe to drink? ▼
How many people does Nisky Center serve? ▼
What type of violations does Nisky Center have? ▼
Has PFAS been detected in Nisky Center water? ▼
What water source does Nisky Center 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.