States › Pennsylvania › Clarion County

Clarion County, PA Water Quality

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

📅 2026 Report 🔄 Data updated 2026 Q2 📍 12 water systems · 29 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

Clarion County Earns a B

Clarion County: 29 communities across 12 water systems. 93.1% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 29 communities with a lead detection, 0 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 14 with significant inspection deficiencies
  • 93.1% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
12
Water Systems
Active CWS & NTNCWS
93%
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
  • Highland
    1.00 ppb
    No federal limits exceeded on record
    A
  • Clarion
    1.00 ppb
    No federal limits exceeded on record
    A
  • Clarion
    1.00 ppb
    No federal limits exceeded on record
    A
  • Monroe
    1.00 ppb
    No federal limits exceeded on record
    A
  • Sligo
    1.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Knox
    83.50 ppb
    Lead above the 15 ppb action level
    F
  • East Brady
    17.20 ppb
    Lead above the 15 ppb action level
    F
  • Foxburg
    14.00 ppb
    1 violation currently open
    D
  • Perry
    2.00 ppb
    Copper above the 1,300 ppb action level
    C
  • Rimersburg
    17.90 ppb
    Lead above the 15 ppb action level
    C
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
20
5 – 10 ppb
2
10 – 15 ppb
7

All Cities in Clarion County

Clarion 1.00 ppb A
Clarion 1.00 ppb A
Knox 0.80 ppb B
Paint 7.00 ppb B
Marianne 7.00 ppb B
New Bethlehem 2.60 ppb C
Monroe 1.00 ppb A
Rimersburg 17.90 ppb C
East Brady 17.20 ppb F
Washington 4.10 ppb B
Madison 17.90 ppb C
Sligo 1.00 ppb A
Elk 1.00 ppb A
Strattanville 1.00 ppb A
Knox 83.50 ppb F
Hawthorn 1.80 ppb C
Shippenville 1.00 ppb A
Beaver 0.80 ppb B
Toby 17.90 ppb C
St. Petersburg 3.00 ppb C
Redbank 1.80 ppb C
Piney 1.00 ppb A
Foxburg 14.00 ppb D
Perry 2.00 ppb C
Richland 3.00 ppb C
Brady 17.90 ppb C
Limestone 1.00 ppb A
Highland 1.00 ppb A
Porter 2.60 ppb C
Showing 29 cities
No active violations Active violations

About Clarion County Drinking Water

Clarion County is served by 12 water systems covering 29 communities. 93% have no open violations.

Of the communities reporting lead results, 29 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 0 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 14 of them.

Frequently Asked Questions

Is Clarion County tap water safe to drink?▼
93% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Clarion County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 0 reported none detected and 0 reported no result.
How many water systems serve Clarion County?▼
12 community water systems serve 29 communities here.
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