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Marshall County, MN Water Quality

Water quality data for 12 public water systems serving Marshall County, Minnesota — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 12 water systems · 37 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

Marshall County Earns a B

Marshall County: 37 communities across 12 water systems. 94.6% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 23 communities with a lead detection, 14 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 94.6% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
12
Water Systems
Active CWS & NTNCWS
94%
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
  • New Folden
    2.00 ppb
    No federal limits exceeded on record
    B
  • Sinnott
    Not detected
    No federal limits exceeded on record
    B
  • Warren
    2.00 ppb
    No federal limits exceeded on record
    B
  • Stephen
    Not detected
    No federal limits exceeded on record
    B
  • Newfolden
    2.00 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Strandquist
    Not detected
    Copper above the 1,300 ppb action level
    D
  • West Valley
    Not detected
    Copper above the 1,300 ppb action level
    D
  • McCrea
    2.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Vega
    2.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Oak Park
    2.00 ppb
    Copper above the 1,300 ppb action level
    B
County Lead Level — Median 2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2 ppb — 13.3% of the federal action level
Systems by Lead Level
Under 5 ppb
23
No Data
14

All Cities in Marshall County

Warren 2.00 ppb B
Stephen Not detected B
Argyle Not detected B
Newfolden 2.00 ppb B
Alvarado 2.00 ppb B
Middle River Not detected B
McCrea 2.00 ppb B
Grygla Not detected B
Oslo Not detected B
Vega 2.00 ppb B
Oak Park 2.00 ppb B
Nelson Park 2.00 ppb B
Warrenton 2.00 ppb B
Viking Not detected B
Bloomer 2.00 ppb B
Strandquist Not detected D
Alma 2.00 ppb B
Comstock 2.00 ppb B
Wright 2.00 ppb B
Middle River 2.00 ppb B
Holt Not detected B
Boxville 2.00 ppb B
Wanger 2.00 ppb B
Foldahl 2.00 ppb B
Big Woods 2.00 ppb B
Augsburg 2.00 ppb B
Lincoln 2.00 ppb B
Spruce Valley Not detected B
Valley Not detected B
Marsh Grove 2.00 ppb B
Tamarac Not detected B
Parker 2.00 ppb B
Viking Not detected B
Fork 2.00 ppb B
West Valley Not detected D
Sinnott Not detected B
New Folden 2.00 ppb B
Showing 37 cities
No active violations Active violations

About Marshall County Drinking Water

Marshall County is served by 12 water systems covering 37 communities. 95% have no open violations.

Of the communities reporting lead results, 23 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 14 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 no significant deficiencies.

Frequently Asked Questions

Is Marshall County tap water safe to drink?▼
95% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Marshall County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 14 reported none detected and 0 reported no result.
How many water systems serve Marshall County?▼
12 community water systems serve 37 communities here.
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