Leonia, NJ Water Safety: 55/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Across water systems in Leonia, safety results are uneven — a portion carry active or recent violations, while others meet federal standards without incident, placing the city in the middle tier for NJ.
How Leonia Compares
Data: EPA SDWIS Last verified: 2026-06-03
Leonia Water: The Quick Version
- Homes built before 1986: 90% — older plumbing may contain lead solder.
- Estimated remediation: $2,800 per household.
- CDC health risk index: 10.21.
Water Systems Serving Leonia
In Leonia, NJ, residential water supply is distributed across multiple utilities rather than concentrated in one. The 2 leading providers out of 2 tracked systems each control their own infrastructure, file separate EPA compliance reports, and set independent rate schedules.
Overview
We track water quality and home safety data for 1 ZIP code in Leonia, New Jersey (population ~9,333), covering 2 community water systems serving approximately 805,868 people region-wide.
No EPA violations recorded across any ZIP codes in Leonia — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Leonia: C (55/100)
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
Leonia water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Leonia
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 07605 | C | VEOLIA WATER NEW JERSEY HACKENSACK | 792,713 |
All ZIP Codes in Leonia
- 07605 [C]
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.
CDC Health Data for Leonia
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Leonia's Housing Stock?
With 90% 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
Viewed through the lens of construction era, Leonia is predominantly an older city — a median build year of 1943 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Leonia were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Leonia: Remediation Cost in Perspective
In Leonia, documented water and safety issues can be addressed without making a meaningful dent in home equity — the financial proportionality here is favorable, and the commitment fits within standard property planning frameworks.
Remediation costs in Leonia are relatively low compared to home values. The $1,600–$4,100 estimated range is a small fraction of median property value. Home values are 31% above the New Jersey average.
Protecting Children from Lead in Leonia
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.
If 90% of the Leonia inventory comes from before the federal ban on lead-bearing solder — and if utility samples sit at or near 0.015 mg/L — the gap between citywide averages and one specific faucet becomes a practical concern rather than a theoretical one. That is why one-home reads exist as a separate measurement. A certified filter through retailer networks addresses confirmed exposure where it appears in a household.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Leonia
Flood activity in Leonia is neither negligible nor at the level of the highest-exposure areas in the NFIP dataset. The 22-claim record and 100% flood zone coverage suggest a community that has experienced recurrent events but has not faced the kind of sustained, severe exposure where water-supply contamination becomes a primary public health concern. It sits in a middle range where flood history merits inclusion in any complete local water quality picture.
Leonia has a moderate flood history with 22 FEMA claims averaging $41,964 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>$2,800</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 Leonia
- 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. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 90% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Leonia, NJ