Dauphin County, Pennsylvania
40 ZIP codes · Avg score 53/100 · Grade D · Updated 2026-06-03
For households across Dauphin County's 40 ZIP codes, below-average water safety data and recurring health violations make local monitoring worthwhile — checking the specific system serving an address is the most actionable starting point.
How Dauphin County Compares
How Dauphin County Compares
Dauphin County scores 2 points below the Pennsylvania state average (55/100) and 15 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Dauphin 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: $2,663, driven primarily by sea_level
Infrastructure: 0.442% avg pipe failure probability, 53% of ZIPs at high risk
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Dauphin County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 28 violations. Past 5 years: 41 total (41 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $2,663
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Dauphin County
Remediation costs are relatively manageable for most homeowners in Dauphin 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 Dauphin County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | VEOLIA WATER | 110,000 | 438 |
| 2 | Capital Region Water | 66,540 | 416 |
| 3 | Veolia Mechanicsburg | 45,013 | 416 |
| 4 | Veolia Water Bethel | 7,809 | 416 |
| 5 | Veolia Water Pa Dallas | 7,563 | 416 |
25 total water systems serve Dauphin County.
All ZIP Codes in Dauphin County
40 ZIP codes tracked in Dauphin County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 17023 | Elizabethville | 61 | C | 2 | $200K |
| 2 | 17061 | Millersburg | 59 | C | 2 | $166K |
| 3 | 17106 | Harrisburg | 58 | C | 16 | — |
| 4 | 17107 | Harrisburg | 58 | C | 16 | — |
| 5 | 17120 | Harrisburg | 58 | C | 16 | — |
| 6 | 17121 | Harrisburg | 58 | C | 16 | — |
| 7 | 17122 | Harrisburg | 58 | C | 16 | — |
| 8 | 17123 | Harrisburg | 58 | C | 16 | — |
| 9 | 17124 | Harrisburg | 58 | C | 16 | — |
| 10 | 17125 | Harrisburg | 58 | C | 16 | — |
| 11 | 17126 | Harrisburg | 58 | C | 16 | — |
| 12 | 17127 | Harrisburg | 58 | C | 16 | — |
| 13 | 17128 | Harrisburg | 58 | C | 16 | — |
| 14 | 17129 | Harrisburg | 58 | C | 16 | — |
| 15 | 17130 | Harrisburg | 58 | C | 16 | — |
| 16 | 17140 | Harrisburg | 58 | C | 16 | — |
| 17 | 17177 | Harrisburg | 58 | C | 16 | — |
| 18 | 17105 | Harrisburg | 57 | C | 16 | — |
| 19 | 17108 | Harrisburg | 57 | C | 16 | — |
| 20 | 17109 | Harrisburg | 57 | C | 16 | $203K |
| 21 | 17017 | Dalmatia | 56 | C | 5 (1 health) | $200K |
| 22 | 17036 | Hummelstown | 55 | C | 0 | $317K |
| 23 | 17069 | New Buffalo | 53 | D | 0 | $211K |
| 24 | 17097 | Wiconisco | 53 | D | 0 | $81K |
| 25 | 17101 | Harrisburg | 52 | D | 16 | — |
| 26 | 17102 | Harrisburg | 52 | D | 16 | $173K |
| 27 | 17103 | Harrisburg | 52 | D | 16 | $113K |
| 28 | 17112 | Harrisburg | 52 | D | 16 | $290K |
| 29 | 17113 | Harrisburg | 52 | D | 16 | $141K |
| 30 | 17033 | Hershey | 51 | D | 12 (1 health) | $341K |
| 31 | 17032 | Halifax | 49 | D | 8 | $212K |
| 32 | 17104 | Harrisburg | 47 | D | 16 | $102K |
| 33 | 17111 | Harrisburg | 47 | D | 16 | $226K |
| 34 | 17048 | Lykens | 46 | D | 25 (6 health) | $136K |
| 35 | 17098 | Williamstown | 46 | D | 12 | $113K |
| 36 | 17057 | Middletown | 44 | D | 10 | $187K |
| 37 | 17030 | Gratz | 42 | D | 21 | $235K |
| 38 | 17110 | Harrisburg | 42 | D | 16 | $206K |
| 39 | 17005 | Berrysburg | 40 | D | 0 | $144K |
| 40 | 18917 | Dublin | 33 | F | 15 | $356K |
Recommended Buyer Guides for Dauphin County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Dauphin County, Pennsylvania
Overview
Dauphin County in Pennsylvania covers 40 ZIP codes with an average Home Safety Score of D (53/100).
36 of 40 ZIP codes have recorded EPA violations. 8 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
Dauphin 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.