States › Wisconsin › La Crosse County

La Crosse County, WI Water Quality

Water quality data for 10 public water systems serving La Crosse County, Wisconsin — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 10 water systems · 17 cities
✅
Excellent — All Systems Performing Well

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

A

La Crosse County Earns a A

La Crosse County: 17 communities across 10 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.54 ppb
  • 12 communities with a lead detection, 5 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.54 ppb
Median Lead Level
County-wide, 90th percentile
10
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
  • West Salem
    1.34 ppb
    No federal limits exceeded on record
    A
  • Shelby
    1.10 ppb
    No federal limits exceeded on record
    B
  • Greenfield
    3.43 ppb
    No federal limits exceeded on record
    B
  • Hamilton
    1.34 ppb
    No federal limits exceeded on record
    A
  • Barre
    2.34 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • La Crosse
    10.90 ppb
    PFAS above the limit at 1 of 10 sampling points
    C
  • Farmington
    Not detected
    6 health-based violations since 2015
    B
  • Onalaska
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Campbell
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Onalaska
    Not detected
    Copper above the 1,300 ppb action level
    A
County Lead Level — Median 1.54 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.54 ppb — 10.3% of the federal action level
Systems by Lead Level
Under 5 ppb
11
10 – 15 ppb
1
No Data
5

All Cities in La Crosse County

La Crosse 10.90 ppb C
Onalaska Not detected A
West Salem 1.34 ppb A
Campbell Not detected A
Shelby 1.10 ppb B
Bangor 1.27 ppb B
Onalaska Not detected A
Rockland 1.54 ppb B
Holland 2.78 ppb A
Medary Not detected A
Greenfield 3.43 ppb B
Farmington Not detected B
Hamilton 1.34 ppb A
Barre 2.34 ppb B
Holmen 2.78 ppb A
Bangor 1.27 ppb B
Burns 1.54 ppb B
Showing 17 cities
No active violations Active violations

About La Crosse County Drinking Water

La Crosse County is served by 10 water systems covering 17 communities. No community here has an open violation on record.

Of the communities reporting lead results, 12 recorded a detection, with a median of 1.54 ppb — 10% of the federal action level. 5 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 17 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is La Crosse County tap water safe to drink?▼
No community in La Crosse County has an open violation on record. 1 of 17 have PFAS above the federal limit, which is the main open concern.
What is the lead level in La Crosse County?▼
Among communities with a detection the median is 1.54 ppb, 10% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve La Crosse County?▼
10 community water systems serve 17 communities here.
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