States › Pennsylvania › Northumberland County

Northumberland County, PA Water Quality

Water quality data for 9 public water systems serving Northumberland County, Pennsylvania — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 9 water systems · 27 cities
✅
Excellent — All Systems Performing Well

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

A

Northumberland County Earns a A

Northumberland County: 27 communities across 9 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.89 ppb
  • 17 communities with a lead detection, 10 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 2 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.89 ppb
Median Lead Level
County-wide, 90th percentile
9
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
  • Coal
    1.89 ppb
    No federal limits exceeded on record
    A
  • Shamokin
    1.89 ppb
    No federal limits exceeded on record
    A
  • Milton
    Not detected
    No federal limits exceeded on record
    A
  • Mount Carmel
    1.89 ppb
    No federal limits exceeded on record
    A
  • Northumberland
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • McEwensville
    68.00 ppb
    Lead above the 15 ppb action level
    C
  • East Cameron
    16.00 ppb
    Lead above the 15 ppb action level
    C
  • Lower Mahanoy
    9.00 ppb
    1 significant inspection deficiency
    C
  • Riverside
    1.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Turbotville
    5.00 ppb
    Lead at 5.00 ppb, above a third of the action level
    B
County Lead Level — Median 1.89 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.89 ppb — 12.6% of the federal action level
Systems by Lead Level
Under 5 ppb
10
5 – 10 ppb
5
10 – 15 ppb
2
No Data
10

All Cities in Northumberland County

Sunbury Not detected A
Coal 1.89 ppb A
Shamokin 1.89 ppb A
Milton Not detected A
Mount Carmel 1.89 ppb A
Northumberland Not detected A
Ralpho 1.89 ppb A
Point Not detected A
Kulpmont 1.89 ppb A
Mount Carmel 1.89 ppb A
Watsontown Not detected A
Delaware Not detected A
West Chillisquaque Not detected A
Zerbe 1.89 ppb A
Turbot Not detected A
Upper Augusta Not detected A
Turbotville 5.00 ppb B
Marion Heights 1.89 ppb A
Lower Mahanoy 9.00 ppb C
Herndon 5.00 ppb B
McEwensville 68.00 ppb C
Shamokin 1.89 ppb A
East Cameron 16.00 ppb C
Riverside 1.00 ppb B
Lewis 5.00 ppb B
Jackson 5.00 ppb B
East Chillisquaque Not detected A
Showing 27 cities
No active violations Active violations

About Northumberland County Drinking Water

Northumberland County is served by 9 water systems covering 27 communities. No community here has an open violation on record.

Of the communities reporting lead results, 17 recorded a detection, with a median of 1.89 ppb — 13% of the federal action level. 10 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 Northumberland County tap water safe to drink?▼
No community in Northumberland County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Northumberland County?▼
Among communities with a detection the median is 1.89 ppb, 13% of the 15 ppb action level. 10 reported none detected and 0 reported no result.
How many water systems serve Northumberland County?▼
9 community water systems serve 27 communities here.
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