Seminole County, Florida
27 ZIP codes · Avg score 89/100 · Grade A · Updated
ZipCheckup grade for Seminole County: A.
No federal data flags a major home-safety concern for this ZIP.
Seminole County's tap water quality puts it in the upper tier nationally; the 27 ZIP codes here record few health-based violations.
How Seminole County Compares
How Seminole County Compares
Seminole County scores 9 points above the Florida state average (80/100) and 16 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Seminole County, Florida
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.3 (asthma 9.1%, diabetes 11%)
Estimated additional annual cost per homeowner: $4,660, driven primarily by sea_level
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Seminole County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 29 violations. Past 5 years: 61 total (61 health-based). Health-based violations are declining versus the prior 2-year window.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,660
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 Seminole County
Remediation costs are relatively manageable for most homeowners in Seminole 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 Seminole County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Seminole County
8 community water systems serving Seminole County.
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Show all 8 water systems
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28 total water systems serve Seminole County.
Systems with the most violations in Seminole County
5 water systems with recorded EPA violations.
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All ZIP Codes in Seminole County
27 ZIP codes tracked in Seminole County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 32766 | Oviedo | 100 | A | 3 | $530K |
| 2 | 32779 | Longwood | 97 | A | 11 (3 health) | $459K |
| 3 | 32707 | Casselberry | 96 | A | 12 | $305K |
| 4 | 32714 | Altamonte Springs | 96 | A | 10 | $292K |
| 5 | 32730 | Casselberry | 96 | A | 9 | $285K |
| 6 | 32792 | Winter Park | 95 | A | 14 (2 health) | $344K |
| 7 | 32701 | Altamonte Springs | 93 | A | 14 (1 health) | $258K |
| 8 | 32750 | Longwood | 92 | A | 32 (1 health) | $351K |
| 9 | 32765 | Oviedo | 83 | B | 33 (16 health) | $419K |
| 10 | 32708 | Winter Springs | 79 | B | 13 | $353K |
| 11 | 32773 | Sanford | 78 | B | 19 | $260K |
| 12 | 32771 | Sanford | 77 | B | 19 (3 health) | $333K |
| 13 | 32746 | Lake Mary | 76 | B | 28 (3 health) | $420K |
| 14 | 32715 | Altamonte Springs | — | — | — | |
| 15 | 32716 | Altamonte Springs | — | — | — | |
| 16 | 32718 | Casselberry | — | — | — | |
| 17 | 32719 | Winter Springs | — | — | — | |
| 18 | 32732 | Geneva | — | — | 26 (14 health) | $467K |
| 19 | 32733 | Goldenrod | — | — | — | |
| 20 | 32745 | Mid Florida | — | — | — | |
| 21 | 32747 | Lake Monroe | — | — | — | |
| 22 | 32752 | Longwood | — | — | — | |
| 23 | 32762 | Oviedo | — | — | — | |
| 24 | 32772 | Sanford | — | — | — | |
| 25 | 32791 | Longwood | — | — | — | |
| 26 | 32795 | Lake Mary | — | — | — | |
| 27 | 32799 | Mid Florida | — | — | — |
Recommended Buyer Guides for Seminole County
Strictly editorial - no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Seminole County, Florida
Overview
Seminole County in Florida covers 27 tracked ZIP records with an average Home Safety Score of A (89/100) across 13 scored records.
14 of 14 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 22 health-based violations appear in the available health breakdown.
← Back to Florida Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.