Mount Joy, PA: 1 Violation — 60/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
In recent monitoring cycles, Mount Joy tap water shows a mixed record for PA — several systems have documented violations alongside areas with clean compliance histories.
How Mount Joy Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Mount Joy Residents
- Your city's water systems recorded 1 violation in the past 5 years.
- Average lead level: 0.004 mg/L.
- Homes built before 1986: 47% — older plumbing may contain lead solder.
- Estimated remediation: $3,600 per household.
Mount Joy's Water Providers
Residential water service in Mount Joy, PA is divided among 3 separate utilities, drawn from 4 systems on file with federal regulators.
Overview
We track water quality and home safety data for 1 ZIP code in Mount Joy, Pennsylvania (population ~19,747), covering 4 community water systems serving approximately 80,449 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Mount Joy: C (60/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Mount Joy water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0040 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 17552 | C | 1 | 0 | Mt Joy Boro Authority |
All ZIP Codes in Mount Joy
- 17552 [C] — 1 violation
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
What's in Mount Joy's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Mount Joy Infrastructure Age
With 47% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Development in Mount Joy unfolded across multiple decades, and the median build year of 1981 reflects a housing inventory where eras of construction are genuinely mixed — including portions that predate the federal prohibition on lead solder in plumbing.
Most homes in Mount Joy were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Mount Joy
In Mount Joy, the equity share of documented remediation is meaningful enough to move the household financial perspective from routine maintenance into deliberate budgeting territory — the cost-to-value ratio is moderate, and most homeowners benefit from mapping the full scope against available budgets before committing.
Remediation costs are moderate relative to home values in Mount Joy. The estimated $2,400–$4,800 range is manageable for most homeowners but still worth budgeting for. Home values are 29% above the Pennsylvania average.
Mount Joy: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Locally, 47% of Mount Joy homes carry interior plumbing from the era when lead solder was still permitted in new builds, and citywide monitoring approaches or crosses the EPA action benchmark. Households can find a draw-test kit and certified filtration through verified retailers.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Mount Joy: Flood History & Water Damage Risk
Flood history in Mount Joy spans 51 NFIP claims and 100% flood zone coverage — enough to place it in moderate-exposure territory where flood events are genuinely recurring rather than statistical outliers. That distinction matters for water quality assessment because the connection between flooding and water safety is not uniform across communities. In low-exposure areas, flooding rarely generates the conditions needed to compromise treatment or distribution infrastructure. In high-exposure areas, it can do so repeatedly. Moderate-exposure communities sit in between: flood events occur with enough frequency to make periodic infrastructure stress a reasonable concern, particularly for private well owners and residents in lower-elevation FEMA-designated zones.
Mount Joy has a moderate flood history with 51 FEMA claims averaging $20,741 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$3,600</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Mount Joy
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Haloacetic Acids (HAA5) can reduce the most common contaminant found in Mount Joy's water.
- Check your home's plumbing. With 47% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Mount Joy, PA