States › North Carolina › Union County

Union County, NC Water Quality

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

📅 2026 Report 🔄 Data updated 2026 Q2 📍 4 water systems · 14 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Union County Earns a A

Union County: 14 communities across 4 water systems. 100.0% have no open violations.

  • Median lead where detected: none detected
  • 0 communities with a lead detection, 14 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
—
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
  • Indian Trail
    Not detected
    2 health-based violations since 2015
    A
  • Monroe
    Not detected
    1 health-based violation since 2015
    A
  • Waxhaw
    Not detected
    2 health-based violations since 2015
    A
  • Weddington
    Not detected
    2 health-based violations since 2015
    A
  • Stallings
    Not detected
    2 health-based violations since 2015
    A
⚠ Needs Attention
  • Wingate
    Not detected
    3 health-based violations since 2015
    B
  • Indian Trail
    Not detected
    2 health-based violations since 2015
    A
  • Monroe
    Not detected
    1 health-based violation since 2015
    A
  • Waxhaw
    Not detected
    2 health-based violations since 2015
    A
  • Weddington
    Not detected
    2 health-based violations since 2015
    A

All Cities in Union County

Indian Trail Not detected A
Monroe Not detected A
Waxhaw Not detected A
Weddington Not detected A
Stallings Not detected A
Wesley Chapel Not detected A
Unionville Not detected A
Marvin Not detected A
Wingate Not detected B
Lake Park Not detected A
Mineral Springs Not detected A
Fairview Not detected A
Marshville Not detected B
Hemby Bridge Not detected A
Showing 14 cities
No active violations Active violations

About Union County Drinking Water

Union County is served by 4 water systems covering 14 communities. No community here has an open violation on record.

Lead was not detected in any community in Union County that reported a result.

No community here has PFAS above the federal limit on record. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Union County tap water safe to drink?▼
No community in Union County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Union County?▼
No community reported a lead detection.
How many water systems serve Union County?▼
4 community water systems serve 14 communities here.
← Back to North Carolina water quality overview