States › Illinois › Macoupin County

Macoupin County, IL Water Quality

Water quality data for 24 public water systems serving Macoupin County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 24 water systems · 25 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

Macoupin County Earns a B

Macoupin County: 25 communities across 24 water systems. 84.0% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 7 communities with a lead detection, 18 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 8 with significant inspection deficiencies
  • 84.0% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
24
Water Systems
Active CWS & NTNCWS
84%
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
  • Virden
    Not detected
    No federal limits exceeded on record
    A
  • Brighton
    2.10 ppb
    No federal limits exceeded on record
    A
  • Bunker Hill
    1.00 ppb
    No federal limits exceeded on record
    B
  • Shipman
    2.10 ppb
    No federal limits exceeded on record
    B
  • White City
    Not detected
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Eagarville
    Not detected
    1 violation currently open
    D
  • Hettick
    Not detected
    1 violation currently open
    D
  • Gillespie
    Not detected
    1 violation currently open
    C
  • East Gillespie
    Not detected
    1 violation currently open
    C
  • Palmyra
    Not detected
    1 significant inspection deficiency
    C
County Lead Level — Median 2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2 ppb — 13.3% of the federal action level
Systems by Lead Level
Under 5 ppb
6
5 – 10 ppb
1
No Data
18

All Cities in Macoupin County

Carlinville Not detected B
Staunton Not detected A
Virden Not detected A
Gillespie Not detected C
Brighton 2.10 ppb A
Mount Olive 7.80 ppb B
Girard 1.30 ppb B
Bunker Hill 1.00 ppb B
Benld Not detected B
Wilsonville Not detected B
Shipman 2.10 ppb B
Medora Not detected B
Palmyra Not detected C
Sawyerville Not detected B
Chesterfield Not detected B
White City Not detected B
Nilwood Not detected B
Royal Lakes 1.40 ppb B
Mount Clare Not detected C
Hettick Not detected D
East Gillespie Not detected C
Dorchester Not detected B
Lake Ka-Ho 2.00 ppb B
Modesto Not detected B
Eagarville Not detected D
Showing 25 cities
No active violations Active violations

About Macoupin County Drinking Water

Macoupin County is served by 24 water systems covering 25 communities. 84% have no open violations.

Of the communities reporting lead results, 7 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 18 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 8 of them.

Frequently Asked Questions

Is Macoupin County tap water safe to drink?▼
84% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Macoupin County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 18 reported none detected and 0 reported no result.
How many water systems serve Macoupin County?▼
24 community water systems serve 25 communities here.
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