States › Wisconsin › Polk County

Polk County, WI Water Quality

Water quality data for 14 public water systems serving Polk County, Wisconsin — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 14 water systems · 25 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Polk County Earns a A

Polk County: 25 communities across 14 water systems. 88.0% have no open violations.

  • Median lead where detected: 2.10 ppb
  • 22 communities with a lead detection, 3 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 6 with significant inspection deficiencies
  • 88.0% of communities have no open violations
2.1 ppb
Median Lead Level
County-wide, 90th percentile
14
Water Systems
Active CWS & NTNCWS
88%
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
  • Georgetown
    2.10 ppb
    No federal limits exceeded on record
    B
  • Balsam Lake
    1.00 ppb
    No federal limits exceeded on record
    B
  • Alden
    0.39 ppb
    No federal limits exceeded on record
    B
  • Clear Lake
    2.00 ppb
    No federal limits exceeded on record
    B
  • Dresser
    2.00 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Amery
    Not detected
    1 violation currently open
    C
  • Lincoln
    Not detected
    1 violation currently open
    C
  • Black Brook
    Not detected
    1 violation currently open
    C
  • Clayton
    4.30 ppb
    Copper above the 1,300 ppb action level
    B
  • Milltown
    3.00 ppb
    1 significant inspection deficiency
    B
County Lead Level — Median 2.1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.1 ppb — 14% of the federal action level
Systems by Lead Level
Under 5 ppb
22
No Data
3

All Cities in Polk County

Amery Not detected C
St. Croix Falls 4.70 ppb B
Osceola 0.29 ppb B
Frederic 1.50 ppb B
Luck 2.10 ppb B
Clear Lake 2.00 ppb B
Dresser 2.00 ppb B
Milltown 3.00 ppb B
Centuria 2.80 ppb B
Clayton 4.30 ppb B
Balsam Lake 1.00 ppb B
West Sweden 1.50 ppb B
Lincoln Not detected C
Black Brook Not detected C
Farmington 2.95 ppb B
St. Croix Falls 4.70 ppb B
Johnstown 2.10 ppb B
Osceola 2.00 ppb B
Clear Lake 2.00 ppb B
Luck 2.10 ppb B
Alden 0.39 ppb B
Georgetown 2.10 ppb B
Clayton 4.30 ppb B
Milltown 3.00 ppb B
Balsam Lake 1.00 ppb B
Showing 25 cities
No active violations Active violations

About Polk County Drinking Water

Polk County is served by 14 water systems covering 25 communities. 88% have no open violations.

Of the communities reporting lead results, 22 recorded a detection, with a median of 2.10 ppb — 14% of the federal action level. 3 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 Polk County tap water safe to drink?▼
88% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Polk County?▼
Among communities with a detection the median is 2.10 ppb, 14% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve Polk County?▼
14 community water systems serve 25 communities here.
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