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Nisky Center

PWS ID: VI1000037 · US Virgin Islands

Nisky Center serves 550 people in US Virgin Islands using Groundwater water sources. It has 4 recorded EPA violations, including 1 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (4 compounds found).

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 0.012 ppt. 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. Nisky Center's 4 violations sit below 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.

PFAS Detected

4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
550
Total Violations
4
Health-Based Violations
1
Water Source
Groundwater

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 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 7/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 7/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/24/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/24/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/24/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/24/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 7/24/2024 <9 µg/L 9 µg/L Not Detected
6:2 FTS 7/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/24/2024 0.0052 µg/L 0.004 µg/L Detected
PFDA 7/24/2024 0.0032 µg/L 0.003 µg/L Detected
PFDoA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/24/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/24/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/24/2024 0.0120 µg/L 0.005 µg/L Detected
HFPO-DA 7/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 7/24/2024 0.0037 µg/L 0.003 µg/L Detected
ADONA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 12/17/2024 0.0052 µg/L 0.005 µg/L Detected
6:2 FTS 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 12/17/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 12/17/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 12/17/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFUnA 12/17/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFTrDA 12/17/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 12/17/2024 <0.005 µg/L 0.005 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 Nisky Center.

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 VI1000037 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 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Nisky Center water safe to drink? ▼
Nisky Center (PWS ID: VI1000037) has 4 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 4 PFAS compounds found. This system serves 550 people using Groundwater sources.
How many people does Nisky Center serve? ▼
Nisky Center serves 550 people in US Virgin Islands. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Nisky Center have? ▼
Nisky Center has 4 total violations: 1 health-based violations (MCL exceedances or treatment failures), 0 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Nisky Center water? ▼
Yes. UCMR5 testing detected 4 PFAS compounds in Nisky Center's water supply: PFOA, PFDA, PFBA, PFHxA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Nisky Center use? ▼
Nisky Center uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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