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Sherburne County, MN Water Quality

Water quality data for 8 public water systems serving Sherburne County, Minnesota — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 12 cities
✅
Excellent — All Systems Performing Well

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

A

Sherburne County Earns a A

Sherburne County: 12 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.00 ppb
  • 7 communities with a lead detection, 5 reporting none detected
  • 2 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1 ppb
Median Lead Level
County-wide, 90th percentile
8
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
  • Elk River
    2.00 ppb
    No federal limits exceeded on record
    A
  • Zimmerman
    2.00 ppb
    No federal limits exceeded on record
    A
  • Clear Lake
    1.00 ppb
    No federal limits exceeded on record
    B
  • Baldwin
    Not detected
    No federal limits exceeded on record
    B
  • Livonia
    2.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Becker
    Not detected
    PFAS above the limit at 1 of 4 sampling points
    B
  • Becker
    Not detected
    PFAS above the limit at 1 of 4 sampling points
    B
  • Big Lake
    1.00 ppb
    Copper above the 1,300 ppb action level
    A
  • Big Lake
    1.00 ppb
    Copper above the 1,300 ppb action level
    A
  • Elk River
    2.00 ppb
    No federal limits exceeded on record
    A
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
7
No Data
5

All Cities in Sherburne County

Elk River 2.00 ppb A
Big Lake 1.00 ppb A
Zimmerman 2.00 ppb A
Becker Not detected B
Clear Lake 1.00 ppb B
Big Lake 1.00 ppb A
Baldwin Not detected B
Livonia 2.00 ppb A
Haven Not detected B
Becker Not detected B
Orrock Not detected B
Clear Lake 1.00 ppb B
Showing 12 cities
No active violations Active violations

About Sherburne County Drinking Water

Sherburne County is served by 8 water systems covering 12 communities. No community here has an open violation on record.

Of the communities reporting lead results, 7 recorded a detection, with a median of 1.00 ppb — 7% of the federal action level. 5 reported none detected, which means below the laboratory limit rather than an absence of lead.

2 of 12 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 Sherburne County tap water safe to drink?▼
No community in Sherburne County has an open violation on record. 2 of 12 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Sherburne County?▼
Among communities with a detection the median is 1.00 ppb, 7% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve Sherburne County?▼
8 community water systems serve 12 communities here.
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