PlainWater
Counties → Virginia

Fairfax County, Virginia

Water Systems
44
Population Served
1,317,489
Total Violations
2,070
417 health-based
PFAS Detected
6
of 6 tested

Violation Analysis

93.2%
Systems with Violations
47.0
Avg Violations per System
20.1%
Health-Based Violations

Water Source Types

GW
37 systems (84%)
SW
7 systems (16%)

PFAS Contamination

6
Systems Tested
6
PFAS Detected
100.0%
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

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

No violations on record (3) One or more violations (41)

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
Fairfax County Water Authority 1,121,613 1 Detected
Dulles Airport 76,500 34 Detected
Fort Belvoir 39,303 38 Detected
Vienna, Town Of 30,000 11 Detected
Herndon, Town Of 24,601 6 Detected
Fort Belvoir North Area 11,822 1 Detected
Mount Vernon 3,000 48 -
Fort Belvoir Woodlawn 2,200 0 -
Great Falls Park 2,000 59 -
Bull Run - Main System 1,001 6 -
Bull Run Special Events Center 1,000 12 -
Lake Fairfax-Campground 600 9 -
Riverbend Golf & Country Club 600 106 -
Fountainhead Reg Park - Marina 350 69 -
L`auberge Chez Francois 345 314 -
Tauxemont 250 96 -
Pohick Bay - Pool 200 16 -
Trattoria Villagio 175 54 -
Bull Run - Bathhouse #2 150 35 -
Bull Run - Comfort Station 2 150 31 -
Bull Run - Comfort Station 1 150 69 -
Clifton Cafe 132 0 -
Pleasant Valley Golf 122 102 -
Riverbend Golf - Back Nine 110 13 -
Peterson's Ice Cream Depot 105 4 -
Camp Fraser 100 53 -
Fountainhead Park Comfort Sta 100 16 -
Sandy Run Regional Park 100 31 -
Woodlands Stewardship Education Center 92 0 -
Clifton General Store 75 12 -
Trummer's on Main 75 8 -
Friends of Fairfax Station Inc 50 26 -
Mason Neck State Park 50 29 -
Pohick Bay - Comfort Station #3 50 29 -
Clifton Presby. Church Preschool 45 64 -
Bull Run - Shooting Center 44 44 -
St Francis Episcopal Church 40 19 -
Fairfax Yacht Club 31 217 -
Hemlock Overlook Regional Park 31 95 -
Eastern Ridge School, The 27 12 -
Clifton House 25 163 -
Clifton Town Meeting Hall 25 38 -
Riverbend Park Nature Center 25 21 -
Riverbend Park 25 59 -

Other Counties in Virginia

Loudoun County
102 systems · 433,414 served · 4,980 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 Fairfax County? ▼
Fairfax County has 2,070 total drinking water violations across 44 water systems, of which 417 are health-based violations. 93.2% of systems have at least one violation.
How many people get water from Fairfax County systems? ▼
Water systems in Fairfax County serve approximately 1,317,489 people through 44 public water systems.
Has PFAS been detected in Fairfax County water? ▼
Of 6 water systems tested for PFAS in Fairfax County, 6 had PFAS detected (100.0% detection rate).
What types of water sources supply Fairfax County? ▼
Water systems in Fairfax County use GW (37 systems), SW (7 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. 20.1% of Fairfax 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.