Marrero, LA: High Radon Risk — 45/100 (2026)
2 ZIP codes · 3 water systems · Updated 2026-06-03
The latest EPA cycle for Marrero shows a low safety grade within LA — compliance gaps have persisted over multiple reporting periods, and the city currently holds a low grade in available EPA data.
How Marrero Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Marrero Residents
- Estimated remediation: $1,450 per household.
- CDC health risk index: 14.75 — above typical levels.
Marrero's Water Providers
3 independent water providers serve Marrero, LA — 3 systems appear in federal records.
Overview
We track water quality and home safety data for 2 ZIP codes in Marrero, Louisiana (population ~55,641), covering 3 community water systems serving approximately 396,222 people region-wide.
No EPA violations recorded across any ZIP codes in Marrero — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Marrero: D (45/100)
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
Marrero water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Marrero
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 70072 | F | WESTWEGO WATERWORKS | 8,534 |
| 70073 | D | NEW ORLEANS CARROLLTON WATER WORKS | 334,903 |
All ZIP Codes in Marrero
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.
Marrero 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
How Remediation Costs Compare in Marrero
In Marrero, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in Marrero are relatively low compared to home values. The $950–$2,200 estimated range is a small fraction of median property value. Home values are 12% above the Louisiana average.
Marrero: Flood History & Water Damage Risk
FEMA data places 100% of Marrero's ZIP codes inside designated flood zones, and the NFIP claim record confirms the real-world impact: 17566 filed claims representing decades of documented flood events with consequences for property and, at sufficient severity, for local water infrastructure.
Marrero has a significant flood history with 17,566 FEMA flood insurance claims on record, averaging $10,218 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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>$1,450</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 Marrero
- 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. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- 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 Marrero, LA