Maui County, Hawaii
17 ZIP codes · Avg score 82/100 · Grade B · Updated 2026-06-04
Across Maui County's 17 ZIP codes, EPA compliance data shows above-average performance — violation rates are minimal, none of the county's systems have triggered health-based MCL exceedances in recent cycles, and the county's scores have stayed above the national baseline across every recent reporting period.
How Maui County Compares
How Maui County Compares
Maui County scores 3 points above the Hawaii state average (79/100) and 14 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Maui County, Hawaii
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.6 (asthma 10.3%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $1,594, driven primarily by flood
Infrastructure: 0.351% avg pipe failure probability, 15% of ZIPs at high risk
58.7% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,594
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
65,142 housing units in Maui County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Maui County
Remediation costs are relatively manageable for most homeowners in Maui County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Maui County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Maui County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Kipu | 80 | 5 |
| 2 | Kualapuu | 500 | 5 |
| 3 | Maunaloa-kaluakoi | 1,000 | 4 |
| 4 | Lanai City | 3,200 | 1 |
| 5 | West Kuiaha Meadows | 60 | 0 |
27 total water systems serve Maui County.
All ZIP Codes in Maui County
17 ZIP codes tracked in Maui County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 96767 | Lahaina | 95 | A | 0 | — |
| 2 | 96790 | Kula | 95 | A | 0 | $1040K |
| 3 | 96748 | Kaunakakai | 90 | A | 0 | $356K |
| 4 | 96729 | Hoolehua | 88 | A | 0 | $199K |
| 5 | 96784 | Puunene | 88 | A | 0 | — |
| 6 | 96788 | Pukalani | 88 | A | 0 | — |
| 7 | 96713 | Hana | 87 | A | 0 | $607K |
| 8 | 96757 | Kualapuu | 86 | A | 1 | $419K |
| 9 | 96761 | Lahaina | 85 | A | 0 | $906K |
| 10 | 96763 | Lanai City | 85 | A | 1 | $559K |
| 11 | 96793 | Wailuku | 85 | A | 0 | $776K |
| 12 | 96770 | Maunaloa | 80 | B | 4 | $362K |
| 13 | 96779 | Paia | 73 | B | 0 | $946K |
| 14 | 96753 | Kihei | 72 | B | 0 | $958K |
| 15 | 96708 | Haiku | 70 | B | 0 | $1033K |
| 16 | 96733 | Kahului | 70 | B | 0 | — |
| 17 | 96732 | Kahului | 65 | C | 0 | $833K |
Recommended Buyer Guides for Maui County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Water Filters for Lead — Lead above EPA action level in 3 ZIP codes
- Best Lead Paint Test Kits — 58.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Maui County, Hawaii
Overview
Maui County in Hawaii covers 17 ZIP codes with an average Home Safety Score of B (82/100).
3 of 17 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Hawaii water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.