PlainWater
States → Virginia

ROUND HILL, TOWN OF

PWS ID: VA6107650 · ROUND HILL, Virginia 20142

ROUND HILL, TOWN OF serves 5,019 people in ROUND HILL, Virginia using Groundwater water sources. It has 52 recorded EPA violations, including 22 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (6 compounds found).

Water Quality Snapshot: ROUND HILL, TOWN OF

ROUND HILL, TOWN OF is a local-owned community water system that delivers drinking water to 5,019 residents in ROUND HILL, Virginia (Loudoun County) through 1,662 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 52 total violations for this system , of which 22 (42%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 23 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 6 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 14.5 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Virginia, EPA tracks 2,821 public water systems serving 7,911,199 people, with 146,670 cumulative violations and 25,642 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 52 violations. ROUND HILL, TOWN OF's 52 violations sit at the Virginia average. Statewide, 70 of 171 UCMR5-tested systems have reported PFAS detections (40.9%). 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

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

Population Served
5,019
Total Violations
52
Health-Based Violations
22
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,662
County
Loudoun
School/Daycare
No
MCL Violations
22
Monitoring Violations
23
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 22 2005
Coliform (TCR) MR 11 2011
Gross Alpha, Excl. Radon and U MR 4 2012
Combined Uranium MR 4 2012
Combined Radium (-226 and -228) MR 4 2012

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 27 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 7/22/2024 0.0079 µg/L 0.004 µg/L Detected
11Cl-PF3OUdS 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/22/2024 10.8000 µg/L 9 µg/L Detected
PFNA 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 7/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFOA 7/22/2024 0.0054 µg/L 0.004 µg/L Detected
PFDoA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 7/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 7/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 7/22/2024 0.0042 µg/L 0.003 µg/L Detected
PFTA 7/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
8:2 FTS 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/22/2024 0.0077 µg/L 0.003 µg/L Detected
PFPeS 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/22/2024 0.0044 µg/L 0.003 µg/L Detected
PFMPA 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 7/22/2024 14.5000 µg/L 9 µg/L Detected
PFEESA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/22/2024 0.0083 µg/L 0.003 µg/L Detected
PFDoA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/22/2024 0.0073 µg/L 0.004 µg/L Detected
NFDHA 7/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeA 7/22/2024 0.0035 µg/L 0.003 µg/L Detected
PFHxS 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFMBA 7/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 7/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFMPA 7/22/2024 <0.004 µg/L 0.004 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 ROUND HILL, TOWN OF.

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 VA6107650 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Virginia Drinking Water Authority

Virginia Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects ROUND HILL, TOWN OF under EPA-delegated authority.

Open VA regulator portal

Source: Virginia Department of Health — Office of Drinking Water

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
2012 Gross Alpha, Excl. Radon and U MR 4 SDWIS / VA6107650 / 4000
2012 Combined Uranium MR 4 SDWIS / VA6107650 / 4006
2012 Combined Radium (-226 and -228) MR 4 SDWIS / VA6107650 / 4010
2011 Coliform (TCR) MR 11 SDWIS / VA6107650 / 3100
2005 Coliform (TCR) MCL 22 SDWIS / VA6107650 / 3100

How ROUND HILL, TOWN OF Compares

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

Metric ROUND HILL, TOWN OF Virginia avg Federal benchmark
Total violations 52 52 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 22 9.1 Indicates a contaminant exceeded a federal MCL
PFAS detection 6 compounds 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 5,019 2,804 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,821 regulated public water systems in Virginia.

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 ROUND HILL, TOWN OF water safe to drink? ▼
ROUND HILL, TOWN OF (PWS ID: VA6107650) has 52 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 6 PFAS compounds found. This system serves 5,019 people using Groundwater sources.
How many people does ROUND HILL, TOWN OF serve? ▼
ROUND HILL, TOWN OF serves 5,019 people in ROUND HILL, Virginia. It is a Local-owned system using Groundwater water sources with 1,662 service connections.
What type of violations does ROUND HILL, TOWN OF have? ▼
ROUND HILL, TOWN OF has 52 total violations: 22 health-based violations (MCL exceedances or treatment failures), 23 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ROUND HILL, TOWN OF water? ▼
Yes. UCMR5 testing detected 6 PFAS compounds in ROUND HILL, TOWN OF's water supply: PFOS, lithium, PFOA, PFHxA, PFBS, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does ROUND HILL, TOWN OF use? ▼
ROUND HILL, TOWN OF uses Groundwater 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.

Explore PlainWater

Water in Virginia

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Virginia

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial