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Randolph County, IL Water Quality

Water quality data for 11 public water systems serving Randolph County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 11 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

Randolph County Earns a C

Randolph County: 13 communities across 11 water systems. 92.3% have no open violations.

  • Median lead where detected: 4.30 ppb
  • 8 communities with a lead detection, 5 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 10 with significant inspection deficiencies
  • 92.3% of communities have no open violations
4.3 ppb
Median Lead Level
County-wide, 90th percentile
11
Water Systems
Active CWS & NTNCWS
92%
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
  • Chester
    1.80 ppb
    No federal limits exceeded on record
    A
  • Rockwood
    1.80 ppb
    No federal limits exceeded on record
    A
  • Ellis Grove
    Not detected
    1 significant inspection deficiency
    B
  • Baldwin
    Not detected
    1 significant inspection deficiency
    B
  • Tilden
    Not detected
    2 significant inspection deficiencies
    B
⚠ Needs Attention
  • Sparta
    5.20 ppb
    1 violation currently open
    D
  • Red Bud
    3.40 ppb
    Copper above the 1,300 ppb action level
    D
  • Prairie du Rocher
    7.00 ppb
    Copper above the 1,300 ppb action level
    D
  • Ruma
    7.00 ppb
    Copper above the 1,300 ppb action level
    D
  • Steeleville
    1.70 ppb
    3 significant inspection deficiencies
    C
County Lead Level — Median 4.3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 4.3 ppb — 28.7% of the federal action level
Systems by Lead Level
Under 5 ppb
4
5 – 10 ppb
4
No Data
5

All Cities in Randolph County

Chester 1.80 ppb A
Sparta 5.20 ppb D
Red Bud 3.40 ppb D
Steeleville 1.70 ppb C
Percy 8.30 ppb C
Coulterville Not detected B
Tilden Not detected B
Evansville Not detected C
Prairie du Rocher 7.00 ppb D
Ellis Grove Not detected B
Baldwin Not detected B
Ruma 7.00 ppb D
Rockwood 1.80 ppb A
Showing 13 cities
No active violations Active violations

About Randolph County Drinking Water

Randolph County is served by 11 water systems covering 13 communities. 92% have no open violations.

Of the communities reporting lead results, 8 recorded a detection, with a median of 4.30 ppb — 29% of the federal action level. 5 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 10 of them.

Frequently Asked Questions

Is Randolph County tap water safe to drink?▼
92% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Randolph County?▼
Among communities with a detection the median is 4.30 ppb, 29% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve Randolph County?▼
11 community water systems serve 13 communities here.
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