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Tazewell County, IL Water Quality

Water quality data for 15 public water systems serving Tazewell County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 15 water systems · 17 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

Tazewell County Earns a B

Tazewell County: 17 communities across 15 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.30 ppb
  • 10 communities with a lead detection, 7 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 4 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.3 ppb
Median Lead Level
County-wide, 90th percentile
15
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
  • Pekin
    1.00 ppb
    No federal limits exceeded on record
    A
  • Marquette Heights
    1.02 ppb
    No federal limits exceeded on record
    B
  • North Pekin
    1.02 ppb
    No federal limits exceeded on record
    B
  • Green Valley
    2.60 ppb
    No federal limits exceeded on record
    B
  • Armington
    2.10 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Creve Coeur
    4.00 ppb
    Copper above the 1,300 ppb action level
    C
  • Minier
    Not detected
    Copper above the 1,300 ppb action level
    C
  • Tremont
    2.50 ppb
    Copper above the 1,300 ppb action level
    B
  • East Peoria
    8.00 ppb
    Copper above the 1,300 ppb action level
    B
  • South Pekin
    Not detected
    3 significant inspection deficiencies
    B
County Lead Level — Median 2.3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.3 ppb — 15.3% of the federal action level
Systems by Lead Level
Under 5 ppb
8
5 – 10 ppb
2
No Data
7

All Cities in Tazewell County

Pekin 1.00 ppb A
East Peoria 8.00 ppb B
Morton Not detected B
Washington Not detected A
Creve Coeur 4.00 ppb C
Marquette Heights 1.02 ppb B
Tremont 2.50 ppb B
Mackinaw Not detected B
Heritage Lake Not detected B
Delavan 1.00 ppb B
Minier Not detected C
North Pekin 1.02 ppb B
South Pekin Not detected B
Hopedale 5.70 ppb B
Deer Creek Not detected B
Green Valley 2.60 ppb B
Armington 2.10 ppb B
Showing 17 cities
No active violations Active violations

About Tazewell County Drinking Water

Tazewell County is served by 15 water systems covering 17 communities. No community here has an open violation on record.

Of the communities reporting lead results, 10 recorded a detection, with a median of 2.30 ppb — 15% of the federal action level. 7 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 4 of them.

Frequently Asked Questions

Is Tazewell County tap water safe to drink?▼
No community in Tazewell County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Tazewell County?▼
Among communities with a detection the median is 2.30 ppb, 15% of the 15 ppb action level. 7 reported none detected and 0 reported no result.
How many water systems serve Tazewell County?▼
15 community water systems serve 17 communities here.
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