States › Illinois › Champaign County

Champaign County, IL Water Quality

Water quality data for 19 public water systems serving Champaign County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 19 water systems · 26 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

Champaign County Earns a B

Champaign County: 26 communities across 19 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.00 ppb
  • 17 communities with a lead detection, 9 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 13 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1 ppb
Median Lead Level
County-wide, 90th percentile
19
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
  • Champaign
    1.00 ppb
    No federal limits exceeded on record
    A
  • Urbana
    1.00 ppb
    No federal limits exceeded on record
    A
  • Savoy
    1.00 ppb
    No federal limits exceeded on record
    A
  • St. Joseph
    1.00 ppb
    No federal limits exceeded on record
    A
  • Sidney
    1.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Penfield
    Not detected
    Copper above the 1,300 ppb action level
    C
  • Longview
    1.10 ppb
    Copper above the 1,300 ppb action level
    C
  • Thomasboro
    Not detected
    Copper above the 1,300 ppb action level
    C
  • Ogden
    2.94 ppb
    Copper above the 1,300 ppb action level
    C
  • Royal
    1.00 ppb
    Copper above the 1,300 ppb action level
    C
County Lead Level — Median 1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1 ppb — 6.7% of the federal action level
Systems by Lead Level
Under 5 ppb
17
No Data
9

All Cities in Champaign County

Champaign 1.00 ppb A
Urbana 1.00 ppb A
Rantoul 2.20 ppb A
Savoy 1.00 ppb A
Mahomet Not detected A
St. Joseph 1.00 ppb A
Tolono 1.00 ppb B
Lake of the Woods Not detected C
Fisher Not detected B
Philo 1.80 ppb B
Sidney 1.00 ppb A
Homer Not detected B
Thomasboro Not detected C
Gifford Not detected B
Ogden 2.94 ppb C
Sadorus 1.00 ppb A
Bondville 1.00 ppb A
Broadlands 1.00 ppb B
Ludlow 2.30 ppb B
Seymour 0.60 ppb B
Pesotum 1.00 ppb A
Royal 1.00 ppb C
Ivesdale Not detected B
Penfield Not detected C
Longview 1.10 ppb C
Dewey Not detected C
Showing 26 cities
No active violations Active violations

About Champaign County Drinking Water

Champaign County is served by 19 water systems covering 26 communities. No community here has an open violation on record.

Of the communities reporting lead results, 17 recorded a detection, with a median of 1.00 ppb — 7% 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 13 of them.

Frequently Asked Questions

Is Champaign County tap water safe to drink?▼
No community in Champaign County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Champaign County?▼
Among communities with a detection the median is 1.00 ppb, 7% of the 15 ppb action level. 9 reported none detected and 0 reported no result.
How many water systems serve Champaign County?▼
19 community water systems serve 26 communities here.
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