Northumberland County, Pennsylvania
12 ZIP codes · Avg score 49/100 · Grade D · Updated 2026-06-04
Within Northumberland County's 12 monitored ZIP codes, water quality data indicates below-average safety — independent testing is a reasonable precaution.
How Northumberland County Compares
How Northumberland County Compares
Northumberland County scores 6 points below the Pennsylvania state average (55/100) and 19 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Northumberland County, Pennsylvania
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $3,690, driven primarily by sea_level
Infrastructure: 0.495% avg pipe failure probability, 91% of ZIPs at high risk
76.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Northumberland County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 3 violations. Past 5 years: 5 total (5 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $3,690
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
33,886 housing units in Northumberland County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Northumberland County
Remediation costs are relatively manageable for most homeowners in Northumberland County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Water Systems with Most Violations
Top 5 systems in Northumberland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | AQUA PA ROARING CREEK DIVISION | 43,000 | 49 |
| 2 | Danville Municipal Water Authority | 4,992 | 21 |
| 3 | Veolia Water Pa Inc. Bloomsburg | 29,382 | 21 |
| 4 | Municipal Authority Sunbury | 11,043 | 19 |
| 5 | Coaldale Six Mile Run Water | 320 | 18 |
18 total water systems serve Northumberland County.
All ZIP Codes in Northumberland County
12 ZIP codes tracked in Northumberland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 17821 | Danville | 59 | C | 21 (1 health) | $242K |
| 2 | 16061 | West Sunbury | 57 | C | 8 | $193K |
| 3 | 17801 | Sunbury | 54 | D | 19 (1 health) | $141K |
| 4 | 17847 | Milton | 54 | D | 3 | $185K |
| 5 | 17823 | Dornsife | 53 | D | 0 | $214K |
| 6 | 16679 | Six Mile Run | 52 | D | 18 | $84K |
| 7 | 17872 | Shamokin | 51 | D | 9 | $79K |
| 8 | 17830 | Herndon | 49 | D | 4 | $186K |
| 9 | 17864 | Port Trevorton | 45 | D | 0 | $212K |
| 10 | 17867 | Rebuck | 40 | D | 0 | $150K |
| 11 | 17877 | Snydertown | 40 | D | 0 | — |
| 12 | 17857 | Northumberland | 35 | F | 0 | $192K |
Recommended Buyer Guides for Northumberland County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 76.3% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Northumberland County, Pennsylvania
Overview
Northumberland County in Pennsylvania covers 12 ZIP codes with an average Home Safety Score of D (49/100).
7 of 12 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Pennsylvania water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Northumberland County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
76.3% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.