Johnston County, Oklahoma
8 ZIP codes · Home Safety Score unavailable · 0 of 8 tracked ZIP records scored · Updated
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: Johnston County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.1 (asthma 12.4%, diabetes 15.3%)
Estimated additional annual cost per homeowner: $796, driven primarily by wildfire
58% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Johnston County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 17 violations. Past 5 years: 33 total (33 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
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: $796
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,571 housing units in Johnston 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 Johnston County
Remediation costs are relatively manageable for most homeowners in Johnston 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 Johnston County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Johnston County
7 community water systems serving Johnston County.
Show all 7 water systems
Systems with the most violations in Johnston County
5 water systems with recorded EPA violations.
All ZIP Codes in Johnston County
8 ZIP codes tracked in Johnston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73432 | Coleman | — | — | 3 (1 health) | $114K |
| 2 | 73447 | Mannsville | — | — | 4 (1 health) | $96K |
| 3 | 73450 | Milburn | — | — | 4 (1 health) | $124K |
| 4 | 73455 | Ravia | — | — | $69K | |
| 5 | 73460 | Tishomingo | — | — | 25 (15 health) | $142K |
| 6 | 73461 | Wapanucka | — | — | 72 (43 health) | $99K |
| 7 | 74836 | Connerville | — | — | $210K | |
| 8 | 74856 | Mill Creek | — | — | 6 (2 health) | $122K |
Recommended Buyer Guides for Johnston County
While many sites publish identical guide lists across every county they cover, the selection here changes by location - driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 58% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Johnston County, Oklahoma
Overview
Johnston County in Oklahoma covers 8 tracked ZIP records. No Home Safety Score is published because the required model evidence is incomplete for every tracked record; missing evidence is not treated as zero.
6 of 6 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 58 health-based violations appear in the available health breakdown.
← Back to Oklahoma 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.