Lahaina, HI Water Safety: 90/100 (2026)
2 ZIP codes · 4 water systems · Updated 2026-06-03
Water systems serving Lahaina hold a strong EPA compliance record — the city places among the better-performing areas in HI with few health-based violations on file.
How Lahaina Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Lahaina Residents
- Average lead level: 0.0008 mg/L.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 11.58.
Lahaina's Water Providers
With 3 utilities splitting service in Lahaina, HI, water accountability is distributed across 4 systems on the federal record.
Overview
We track water quality and home safety data for 2 ZIP codes in Lahaina, Hawaii, covering 4 community water systems serving approximately 21,766 people.
No EPA violations recorded across any ZIP codes in Lahaina — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Lahaina: A (90/100)
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
Lahaina water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0008 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Areas with No Violations
All ZIP Codes in Lahaina
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.
Lahaina 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 Lahaina
In Lahaina, 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 Lahaina are relatively low compared to home values. The $800–$1,800 estimated range is a small fraction of median property value. Home values are 25% above the Hawaii average.
Lahaina: 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.
Lead risk in Lahaina appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Lahaina: Flood History & Water Damage Risk
The NFIP claim record for Lahaina — 199 filed incidents — reflects genuine, recurring flood exposure rather than an isolated event or two. When a community accumulates flood claims at this volume and carries 100% of its ZIP codes inside FEMA-designated zones, flood history starts to factor into water quality planning in ways it doesn't for lower-exposure areas. Flooding introduces specific contamination pathways — runoff overwhelming treatment facility intake, surface water infiltrating private wells, and pressure disruptions in distribution systems allowing backflow — all of which become more relevant as flood frequency increases.
Lahaina has a moderate flood history with 199 FEMA claims averaging $6,137 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>$1,200</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.
Deep Dive Reports
Detailed analysis for Lahaina, HI