Martin County, Florida
12 ZIP codes · Avg score 74/100 · Grade B · Updated 2026-06-03
Spanning 12 ZIP codes, Martin County posts strong drinking water compliance — most systems have never triggered a health-based notice.
How Martin County Compares
How Martin County Compares
Martin County scores 1 points above the Florida state average (73/100) and 6 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Martin County, Florida
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.6 (asthma 9.2%, diabetes 13.7%)
Estimated additional annual cost per homeowner: $5,458, driven primarily by sea_level
Infrastructure: 0.332% avg pipe failure probability, 8% of ZIPs at high risk
56% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Martin County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 21 violations. Past 5 years: 28 total (28 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $5,458
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
80,865 housing units in Martin 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 Martin County
Remediation costs are relatively manageable for most homeowners in Martin 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 Martin 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 Martin County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Martin Company Utilities | 104,105 | 442 |
| 2 | South Martin Regional Utilities | 27,000 | 202 |
| 3 | Stuart, City of - Water Plant | 16,841 | 196 |
| 4 | Sailfish Point | 1,145 | 196 |
| 5 | St. Lucie Falls | 499 | 196 |
24 total water systems serve Martin County.
All ZIP Codes in Martin County
12 ZIP codes tracked in Martin County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 34956 | Indiantown | 90 | A | 59 (2 health) | $204K |
| 2 | 33475 | Hobe Sound | 87 | A | 65 (2 health) | — |
| 3 | 34958 | Jensen Beach | 87 | A | 61 (2 health) | — |
| 4 | 34995 | Stuart | 81 | B | 49 | — |
| 5 | 34991 | Palm City | 78 | B | 38 (1 health) | — |
| 6 | 33469 | Jupiter | 76 | B | 23 (1 health) | $553K |
| 7 | 33455 | Hobe Sound | 72 | B | 65 (2 health) | $396K |
| 8 | 34994 | Stuart | 66 | C | 49 | $249K |
| 9 | 34996 | Stuart | 66 | C | 49 | $409K |
| 10 | 34997 | Stuart | 66 | C | 49 | $335K |
| 11 | 34990 | Palm City | 63 | C | 38 (1 health) | $558K |
| 12 | 33956 | Saint James City | 50 | D | 0 | $285K |
Recommended Buyer Guides for Martin County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 56% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Martin County, Florida
Overview
Martin County in Florida covers 12 ZIP codes with an average Home Safety Score of B (74/100).
11 of 12 ZIP codes have recorded EPA violations. 11 health-based violations have been documented.
← Back to Florida 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.