States › Illinois › Perry County

Perry County, IL Water Quality

Water quality data for 5 public water systems serving Perry County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 5 water systems · 6 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Perry County Earns a C

Perry County: 6 communities across 5 water systems. 50.0% have no open violations.

  • Median lead where detected: none detected
  • 0 communities with a lead detection, 6 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 2 with significant inspection deficiencies
  • 50.0% of communities have no open violations
—
Median Lead Level
County-wide, 90th percentile
5
Water Systems
Active CWS & NTNCWS
50%
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
  • Tamaroa
    Not detected
    No federal limits exceeded on record
    B
  • Willisville
    Not detected
    2 significant inspection deficiencies
    B
  • Du Quoin
    Not detected
    1 violation currently open
    C
  • St. Johns
    Not detected
    1 violation currently open
    C
  • Pinckneyville
    Not detected
    3 significant inspection deficiencies
    C
⚠ Needs Attention
  • Cutler
    Not detected
    1 violation currently open
    D
  • Pinckneyville
    Not detected
    3 significant inspection deficiencies
    C
  • Du Quoin
    Not detected
    1 violation currently open
    C
  • St. Johns
    Not detected
    1 violation currently open
    C
  • Willisville
    Not detected
    2 significant inspection deficiencies
    B

All Cities in Perry County

Du Quoin Not detected C
Pinckneyville Not detected C
Willisville Not detected B
Tamaroa Not detected B
Cutler Not detected D
St. Johns Not detected C
Showing 6 cities
No active violations Active violations

About Perry County Drinking Water

Perry County is served by 5 water systems covering 6 communities. 50% have no open violations.

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

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 2 of them.

Frequently Asked Questions

Is Perry County tap water safe to drink?▼
50% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Perry County?▼
No community reported a lead detection.
How many water systems serve Perry County?▼
5 community water systems serve 6 communities here.
← Back to Illinois water quality overview