St. Johns County, Florida
5 ZIP codes · Avg score 77/100 · Grade B · Updated 2026-06-03
EPA monitoring reports for St. Johns County cover 5 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How St. Johns County Compares
How St. Johns County Compares
St. Johns County scores 4 points above the Florida state average (73/100) and 9 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: St. Johns County, Florida
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.9 (asthma 9.3%, diabetes 10.6%)
Estimated additional annual cost per homeowner: $4,494, driven primarily by sea_level
Infrastructure: 0.176% avg pipe failure probability
15% 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: $4,494
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
48,022 housing units in St. Johns 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 St. Johns County
Remediation costs are relatively manageable for most homeowners in St. Johns 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 St. Johns 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 St. Johns County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Sjcu-ponte Vedra Ws | 15,565 | 39 |
| 2 | Jea: Ponce De Leon Grid | 2,303 | 32 |
| 3 | JEA MAJOR GRID | 826,664 | 24 |
| 4 | Sjcu-sawgrass Grid | 13,023 | 23 |
| 5 | Cypress Landing Wtp | 38 | 1 |
6 total water systems serve St. Johns County.
All ZIP Codes in St. Johns County
5 ZIP codes tracked in St. Johns County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 32081 | Ponte Vedra | 85 | A | 7 | $590K |
| 2 | 32004 | Ponte Vedra Beach | 84 | B | 16 | — |
| 3 | 32259 | Saint Johns | 77 | B | 1 | $481K |
| 4 | 32033 | Elkton | 73 | B | 0 | $279K |
| 5 | 32082 | Ponte Vedra Beach | 64 | C | 16 | $733K |
Recommended Buyer Guides for St. Johns County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Water Testing Kits — Baseline water quality check for your ZIP
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant peace of mind
Deep Dive Reports
Detailed analysis for St. Johns County, Florida
Overview
St. Johns County in Florida covers 5 ZIP codes with an average Home Safety Score of B (77/100).
4 of 5 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.