COUNTY REPORT HI

Kalawao County, Hawaii

1 ZIP code · Avg score 86/100 · Grade A · Updated 2026-06-04

Kalawao County — 1 ZIP code, above-average safety grade.

How Kalawao County Compares

Kalawao County86/100
Hawaii avg79/100
National avg68/100

How Kalawao County Compares

A
County Grade
86/100
Avg Safety Score
1
ZIP Codes
1
Water Systems

Kalawao County scores 7 points above the Hawaii state average (79/100) and 18 points above the national average (68/100).

Data: EPA SDWIS Last verified: 2026-06-04

A
County Grade
86
Avg Safety Score
1
ZIP Codes
Only ZIP: 96742

Key Risk Factors

Health risk index: 17.1 (asthma 10.2%, diabetes 22.1%)

Estimated additional annual cost per homeowner: $1,420, driven primarily by energy_code_gap

Infrastructure: 0.47% avg pipe failure probability, 100% of ZIPs at high risk

84% of homes built before 1978 (lead paint era)

County Health Indicators vs National Average

Asthma 10.2% (national: 8.9%)
Diabetes 22.1% (national: 10.5%)
Obesity 38.5% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1900
Median Build Year
84%
Pre-1978 Housing
47%
Pipe Failure Probability
100%
ZIPs at High Infra Risk
High
Lead Pipe Risk

Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,420

Energy Code Gap $540/yr
Water / Lead $400/yr
Sea Level Rise $400/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

96 housing units in Kalawao County

Pre-1940 52%
1940–1959 25%
1960–1979 6%
1980–1999 14%
2000+ 3%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Health Outcomes vs National Average

CDC PLACES data for Kalawao County residents

Asthma 10.2% (US avg: 8.9%)
Diabetes 22.1% (US avg: 11%)
Obesity 38.5% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

All ZIP Codes in Kalawao County

1 ZIP code tracked in Kalawao County.

# ZIP Code City Safety Score Grade Violations
1 96742 Kalaupapa 86 A 1

Recommended Buyer Guides for Kalawao County

Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.

Overview

Kalawao County in Hawaii covers 1 ZIP code with an average Home Safety Score of A (86/100).

1 of 1 ZIP code have recorded EPA violations. All violations are monitoring/reporting type.

← Back to Hawaii water quality report

Data Sources

Updated daily.

Frequently Asked Questions

Is water safe in Kalawao County?
Kalawao County receives a grade of A, indicating generally safe tap water across its 1 ZIP codes.
How many water systems serve Kalawao County?
Kalawao County is served by 1 public water system that supplies drinking water to residents across 1 ZIP codes.
What is the biggest environmental risk in Kalawao County?
The primary environmental risk factor in Kalawao County is energy_code_gap. This contributes to an estimated additional annual cost of $1,420 per homeowner.
How old are homes in Kalawao County?
The median home build year in Kalawao County is 1900. 84% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Kalawao County compare to Hawaii?
Kalawao County has an average water safety score of 86/100, which is above the Hawaii state average of 79/100.

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