PlainWater
Counties → Virginia

Loudoun County, Virginia

Water Systems
102
Population Served
433,414
Total Violations
4,980
403 health-based
PFAS Detected
4
of 5 tested

Violation Analysis

77.5%
Systems with Violations
48.8
Avg Violations per System
8.1%
Health-Based Violations

Water Source Types

GW
45 systems (44%)
SW
5 systems (5%)

PFAS Contamination

5
Systems Tested
4
PFAS Detected
80.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Loudoun Virginia water systems by violation status, EPA SDWIS records.

No violations on record (8) One or more violations (42)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Loudoun Water - Central System 334,808 43 Detected
Leesburg, Town Of 65,028 0 Clean
Purcellville, Town Of 8,929 41 Detected
Round Hill, Town Of 5,019 52 Detected
Lovettsville, Town Of 2,964 101 -
Hamilton, Town Of 2,240 37 Detected
Selma Estates 1,540 0 -
Elysian Heights 1,061 0 -
VA Revolution Sportsplex 1,001 25 -
Middleburg, Town Of 803 188 -
Claude Mr Pk-Visit Ctr (Prev Roy Geiger) 800 10 -
Franklin Park 800 8 -
Cornerstone Christian Academy 653 24 -
Loudoun Golf & Country Club 490 1 -
Stoneleigh 438 0 -
Beacon Hill-Lcsa 333 14 -
Foxcroft School 301 142 -
Orion Project (Hitt) 300 3 -
Scott Jenkins Memorial Park 300 0 -
Reserve at Rokeby Farm 284 0 -
Lucketts Elementary School 269 4 -
North Spring Behavioral Healthcare 225 76 -
Main Street Truck Stop 206 80 -
Flying Ace Farm 200 9 -
Waterford Elementary School 196 11 -
Banneker Elementary School 193 16 -
Adesa Washington DC 178 170 -
Camp Highroad 150 72 -
Middleburg Community Center 150 5 -
Bluemont Community Center 146 23 -
Lincoln Elementary School 137 9 -
Whitehall Associates Lc 125 74 -
Old 690 Brewery 115 10 -
Aldie Elementary School 106 1 -
Saint Francis Desales Catholic Church 103 16 -
Harpers Ferry Adventure Center 100 3 -
Creighton Farms 95 0 -
Hillsboro, Town Of 88 1,416 -
Loudoun County Firing Range 88 0 -
Eagletree Farm 86 12 -
Hiway Mhc LLC 80 23 -
Sterling Ruritan 75 8 -
Aldie Water Company 70 558 -
Creeks Edge Winery 64 24 -
One Stop Trailer Park 60 440 -
Tart Lumber Company, Inc. 60 26 -
The Ag District Center 58 4 -
Cerritos Pupuseria 58 74 -
Stone Tower - Tower View 58 21 -
North Oatlands Animal Hospital 55 4 -

Other Counties in Virginia

Fairfax County
44 systems · 1,317,489 served · 2,070 violations
Prince William County
45 systems · 416,494 served · 1,444 violations
Chesterfield County
9 systems · 390,851 served · 331 violations
Henrico County
12 systems · 330,857 served · 390 violations
Arlington County
4 systems · 244,747 served · 65 violations
Stafford County
18 systems · 127,351 served · 1,020 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Loudoun County? ▼
Loudoun County has 4,980 total drinking water violations across 102 water systems, of which 403 are health-based violations. 77.5% of systems have at least one violation.
How many people get water from Loudoun County systems? ▼
Water systems in Loudoun County serve approximately 433,414 people through 102 public water systems.
Has PFAS been detected in Loudoun County water? ▼
Of 5 water systems tested for PFAS in Loudoun County, 4 had PFAS detected (80.0% detection rate).
What types of water sources supply Loudoun County? ▼
Water systems in Loudoun County use GW (45 systems), SW (5 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 8.1% of Loudoun County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on 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.