Monroe County, Florida
5 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-07-16
ZipCheckup grade for Monroe: B.
This ZIP looks solid, with a few items worth a quick check.
Monroe County maintains reliable drinking water quality across all 5 of its tracked ZIP codes.
How Monroe County Compares
How Monroe County Compares
Monroe County scores 2 points above the Florida state average (73/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-16
ZIP Code Risk Map
Water Quality Map: Monroe County, Florida
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.8 (asthma 8.9%, diabetes 13.2%)
Estimated additional annual cost per homeowner: $2,842, driven primarily by sea_level
Infrastructure: 0.313% avg pipe failure probability
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Monroe County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 1 violation. Past 5 years: 2 total (2 health-based).
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: $2,842
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Monroe County
Remediation costs are relatively manageable for most homeowners in Monroe 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 Monroe County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Monroe County
8 community water systems serving Monroe County.
- B
- B
- B
- B
- B
- B
Show all 8 water systems
- B
- B
14 total water systems serve Monroe County.
Systems with the most violations in Monroe County
3 water systems with recorded EPA violations.
- B
- B
- B
All ZIP Codes in Monroe County
5 ZIP codes tracked in Monroe County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 33041 | Key West | 81 | B | 11 | — |
| 2 | 33045 | Key West | 81 | B | 11 | — |
| 3 | 33090 | Homestead | 81 | B | 29 | — |
| 4 | 33541 | Zephyrhills | 71 | B | 19 | $111K |
| 5 | 33040 | Key West | 61 | C | 11 | $766K |
Recommended Buyer Guides for Monroe County
Eight risk categories drive the selection - PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback - and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- 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 Monroe County, Florida
Overview
Monroe County in Florida covers 5 ZIP codes with an average Home Safety Score of B (75/100).
5 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.