States › Illinois › Clinton County

Clinton County, IL Water Quality

Water quality data for 13 public water systems serving Clinton County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 13 water systems · 13 cities
⚠️
Caution Advised — Some Systems Need Attention

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

C

Clinton County Earns a C

Clinton County: 13 communities across 13 water systems. 84.6% have no open violations.

  • Median lead where detected: 6.70 ppb
  • 4 communities with a lead detection, 9 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 12 with significant inspection deficiencies
  • 84.6% of communities have no open violations
6.7 ppb
Median Lead Level
County-wide, 90th percentile
13
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
  • New Baden
    12.60 ppb
    Lead at 12.60 ppb, above a third of the action level
    A
  • Beckemeyer
    Not detected
    2 significant inspection deficiencies
    B
  • Wamac
    2.40 ppb
    1 significant inspection deficiency
    B
  • Hoffman
    0.90 ppb
    2 significant inspection deficiencies
    B
  • Breese
    Not detected
    3 significant inspection deficiencies
    B
⚠ Needs Attention
  • St. Rose
    Not detected
    Copper above the 1,300 ppb action level
    F
  • Damiansville
    Not detected
    1 violation currently open
    D
  • Aviston
    Not detected
    Copper above the 1,300 ppb action level
    C
  • Bartelso
    Not detected
    Copper above the 1,300 ppb action level
    C
  • Carlyle
    11.00 ppb
    1 significant inspection deficiency
    C
County Lead Level — Median 6.7 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 6.7 ppb — 44.7% of the federal action level
Systems by Lead Level
Under 5 ppb
2
10 – 15 ppb
2
No Data
9

All Cities in Clinton County

Breese Not detected B
New Baden 12.60 ppb A
Carlyle 11.00 ppb C
Trenton Not detected C
Aviston Not detected C
Germantown Not detected B
Albers Not detected B
Beckemeyer Not detected B
Bartelso Not detected C
Wamac 2.40 ppb B
Damiansville Not detected D
St. Rose Not detected F
Hoffman 0.90 ppb B
Showing 13 cities
No active violations Active violations

About Clinton County Drinking Water

Clinton County is served by 13 water systems covering 13 communities. 85% have no open violations.

Of the communities reporting lead results, 4 recorded a detection, with a median of 6.70 ppb — 45% of the federal action level. 9 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 12 of them.

Frequently Asked Questions

Is Clinton County tap water safe to drink?▼
85% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Clinton County?▼
Among communities with a detection the median is 6.70 ppb, 45% of the 15 ppb action level. 9 reported none detected and 0 reported no result.
How many water systems serve Clinton County?▼
13 community water systems serve 13 communities here.
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