States › Oregon › Marion County

Marion County, OR Water Quality

Water quality data for 21 public water systems serving Marion County, Oregon — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 21 water systems · 23 cities
✅
Excellent — All Systems Performing Well

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

A

Marion County Earns a A

Marion County: 23 communities across 21 water systems. 100.0% have no open violations.

  • Median lead where detected: 3.20 ppb
  • 15 communities with a lead detection, 8 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 2 with significant inspection deficiencies
  • 100.0% of communities have no open violations
3.2 ppb
Median Lead Level
County-wide, 90th percentile
21
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
  • Salem
    2.00 ppb
    No federal limits exceeded on record
    A
  • Keizer
    Not detected
    No federal limits exceeded on record
    A
  • Woodburn
    3.40 ppb
    No federal limits exceeded on record
    A
  • Hayesville
    2.00 ppb
    No federal limits exceeded on record
    A
  • Four Corners
    2.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Mehama
    3.30 ppb
    Copper above the 1,300 ppb action level
    C
  • Stayton
    6.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Labish Village
    3.60 ppb
    1 significant inspection deficiency
    B
  • Gates
    11.90 ppb
    Lead at 11.90 ppb, above a third of the action level
    B
  • Silverton
    Not detected
    1 health-based violation since 2015
    A
County Lead Level — Median 3.2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 3.2 ppb — 21.3% of the federal action level
Systems by Lead Level
Under 5 ppb
13
5 – 10 ppb
1
10 – 15 ppb
1
No Data
8

All Cities in Marion County

Salem 2.00 ppb A
Keizer Not detected A
Woodburn 3.40 ppb A
Hayesville 2.00 ppb A
Silverton Not detected A
Four Corners 2.00 ppb A
Stayton 6.00 ppb B
Aumsville Not detected A
Mount Angel 3.20 ppb A
Jefferson Not detected B
Hubbard Not detected A
Sublimity Not detected B
Gervais 1.50 ppb B
Turner Not detected B
Aurora 3.50 ppb B
Donald 2.30 ppb B
Gates 11.90 ppb B
Labish Village 3.60 ppb B
St. Paul 1.80 ppb B
Mehama 3.30 ppb C
Scotts Mills 4.80 ppb B
Brooks Not detected B
Detroit 1.62 ppb B
Showing 23 cities
No active violations Active violations

About Marion County Drinking Water

Marion County is served by 21 water systems covering 23 communities. No community here has an open violation on record.

Of the communities reporting lead results, 15 recorded a detection, with a median of 3.20 ppb — 21% 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 2 of them.

Frequently Asked Questions

Is Marion County tap water safe to drink?▼
No community in Marion County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Marion County?▼
Among communities with a detection the median is 3.20 ppb, 21% of the 15 ppb action level. 8 reported none detected and 0 reported no result.
How many water systems serve Marion County?▼
21 community water systems serve 23 communities here.
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