States › Illinois › Whiteside County

Whiteside County, IL Water Quality

Water quality data for 9 public water systems serving Whiteside County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 9 water systems · 11 cities
⚠️
Caution Advised — Some Systems Need Attention

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

C

Whiteside County Earns a C

Whiteside County: 11 communities across 9 water systems. 54.5% have no open violations.

  • Median lead where detected: 2.20 ppb
  • 3 communities with a lead detection, 8 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 6 with significant inspection deficiencies
  • 54.5% of communities have no open violations
2.2 ppb
Median Lead Level
County-wide, 90th percentile
9
Water Systems
Active CWS & NTNCWS
54%
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
  • Rock Falls
    4.36 ppb
    No federal limits exceeded on record
    B
  • Morrison
    1.00 ppb
    No federal limits exceeded on record
    A
  • Lyndon
    Not detected
    No federal limits exceeded on record
    B
  • Sterling
    Not detected
    Copper above the 1,300 ppb action level
    B
  • Galt
    Not detected
    Copper above the 1,300 ppb action level
    B
⚠ Needs Attention
  • Albany
    2.20 ppb
    Copper above the 1,300 ppb action level
    F
  • Erie
    Not detected
    1 violation currently open
    D
  • Tampico
    Not detected
    1 violation currently open
    D
  • Prophetstown
    Not detected
    Copper above the 1,300 ppb action level
    D
  • Fulton
    Not detected
    1 violation currently open
    C
County Lead Level — Median 2.2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.2 ppb — 14.7% of the federal action level
Systems by Lead Level
Under 5 ppb
3
No Data
8

All Cities in Whiteside County

Sterling Not detected B
Rock Falls 4.36 ppb B
Morrison 1.00 ppb A
Fulton Not detected C
Prophetstown Not detected D
Erie Not detected D
Albany 2.20 ppb F
Tampico Not detected D
Lyndon Not detected B
Galt Not detected B
Como Not detected B
Showing 11 cities
No active violations Active violations

About Whiteside County Drinking Water

Whiteside County is served by 9 water systems covering 11 communities. 55% have no open violations.

Of the communities reporting lead results, 3 recorded a detection, with a median of 2.20 ppb — 15% of the federal action level. 8 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 6 of them.

Frequently Asked Questions

Is Whiteside County tap water safe to drink?▼
55% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Whiteside County?▼
Among communities with a detection the median is 2.20 ppb, 15% of the 15 ppb action level. 8 reported none detected and 0 reported no result.
How many water systems serve Whiteside County?▼
9 community water systems serve 11 communities here.
← Back to Illinois water quality overview