States › Virginia › Prince William County

Prince William County, VA Water Quality

Water quality data for 4 public water systems serving Prince William County, Virginia — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 4 water systems · 24 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Prince William County Earns a B

Prince William County: 24 communities across 4 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.98 ppb
  • 1 communities with a lead detection, 23 reporting none detected
  • 12 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.98 ppb
Median Lead Level
County-wide, 90th percentile
4
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Linton Hall
    Not detected
    No federal limits exceeded on record
    A
  • Sudley
    Not detected
    No federal limits exceeded on record
    A
  • Gainesville
    Not detected
    No federal limits exceeded on record
    A
  • Bull Run
    Not detected
    No federal limits exceeded on record
    A
  • Buckhall
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Dale City
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    B
  • Lake Ridge
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    B
  • Woodbridge
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    B
  • Cherry Hill
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    B
  • Montclair
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    B
County Lead Level — Median 1.98 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.98 ppb — 13.2% of the federal action level
Systems by Lead Level
Under 5 ppb
1
No Data
23

All Cities in Prince William County

Dale City Not detected B
Lake Ridge Not detected B
Woodbridge Not detected B
Linton Hall Not detected A
Cherry Hill Not detected B
Montclair Not detected B
Leesylvania Not detected B
Sudley Not detected A
Gainesville Not detected A
Bull Run Not detected A
Buckhall Not detected A
Yorkshire Not detected A
Independent Hill Not detected B
Triangle Not detected B
Potomac Mills Not detected B
Dumfries Not detected B
Loch Lomond Not detected A
County Center Not detected B
Haymarket Not detected A
Nokesville Not detected A
Occoquan Not detected B
Innovation Not detected A
Quantico Base 1.98 ppb B
Bull Run Mountain Estates Not detected A
Showing 24 cities
No active violations Active violations

About Prince William County Drinking Water

Prince William County is served by 4 water systems covering 24 communities. No community here has an open violation on record.

Of the communities reporting lead results, 1 recorded a detection, with a median of 1.98 ppb — 13% of the federal action level. 23 reported none detected, which means below the laboratory limit rather than an absence of lead.

12 of 24 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Prince William County tap water safe to drink?▼
No community in Prince William County has an open violation on record. 12 of 24 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Prince William County?▼
Among communities with a detection the median is 1.98 ppb, 13% of the 15 ppb action level. 23 reported none detected and 0 reported no result.
How many water systems serve Prince William County?▼
4 community water systems serve 24 communities here.
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