Hahnville, LA: High Radon Risk — 47/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Public water data for Hahnville, LA shows a low safety grade — health-based violations appear across a meaningful share of service areas in current EPA records.
How Hahnville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Hahnville Residents
- Homes built before 1986: 46% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 13.78 — above typical levels.
Hahnville's Water Providers
Most residential addresses in Hahnville, LA are served by a single water utility — the dominant system among the 1 provider tracked in federal data.
Overview
We track water quality and home safety data for 1 ZIP code in Hahnville, Louisiana (population ~4,475), covering 1 community water system serving approximately 52,879 people region-wide.
No EPA violations recorded across any ZIP codes in Hahnville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Hahnville: D (47/100)
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
Hahnville water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Hahnville
- 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.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 70057 | D | ST CHARLES PARISH DEPT OF WATERWORKS | 52,879 |
All ZIP Codes in Hahnville
- 70057 [D]
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.
Hahnville Community Health Snapshot
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
Hahnville Infrastructure Age
With 46% 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
Some cities skew heavily toward one construction era; Hahnville does not. The median build year of 1982 reflects a housing stock where older and newer homes share the market in meaningful proportions. That mixed profile means the city carries moderate aggregate plumbing-era risk — with older homes, particularly those built before 1986, representing the portion of the stock where lead-soldered joints may still be present.
Most homes in Hahnville 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 Hahnville
Remediation costs in Hahnville are small relative to typical property values — the cost-to-value ratio here is favorable.
Remediation costs in Hahnville are relatively low compared to home values. The $1,100–$2,600 estimated range is a small fraction of median property value. Home values are 28% above the Louisiana average.
Hahnville: 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.
If 46% of the Hahnville 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.
Hahnville: Flood History & Water Damage Risk
Flood activity in Hahnville is neither negligible nor at the level of the highest-exposure areas in the NFIP dataset. The 143-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.
Hahnville has a moderate flood history with 143 FEMA claims averaging $18,755 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>$1,700</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 Hahnville
- 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 46% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Hahnville, LA