Osage County, Kansas
9 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-06-03
Osage County earns a high water safety grade — 9 ZIP codes tracked, virtually all compliant.
How Osage County Compares
How Osage County Compares
Osage County scores 11 points above the Kansas state average (64/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Osage County, Kansas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.6 (asthma 10.1%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $634, driven primarily by water_lead
Infrastructure: 0.427% avg pipe failure probability, 56% of ZIPs at high risk
69.7% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Osage County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 9 violations. Past 5 years: 12 total (12 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: $634
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,426 housing units in Osage 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 Osage County
Remediation costs are relatively manageable for most homeowners in Osage 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 Osage 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 Osage County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Osage Company Rwd 5 | 3,763 | 54 |
| 2 | Osage Company Rwd 3 | 900 | 39 |
| 3 | Osage Company Rwd 2 | 220 | 33 |
| 4 | Osage Company Rwd 8 | 2,240 | 21 |
| 5 | Douglas Company Rwd 3 | 4,663 | 16 |
19 total water systems serve Osage County.
All ZIP Codes in Osage County
9 ZIP codes tracked in Osage County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 66523 | Osage City | 81 | B | 1 | $148K |
| 2 | 66510 | Melvern | 80 | B | 4 | $179K |
| 3 | 66543 | Vassar | 80 | B | 3 | $167K |
| 4 | 66413 | Burlingame | 78 | B | 5 | $124K |
| 5 | 66537 | Scranton | 77 | B | 3 | $92K |
| 6 | 66528 | Quenemo | 76 | B | 14 (4 health) | $198K |
| 7 | 66524 | Overbrook | 74 | B | 16 (4 health) | $152K |
| 8 | 66414 | Carbondale | 69 | C | 13 | $146K |
| 9 | 66451 | Lyndon | 60 | C | 3 | $156K |
Recommended Buyer Guides for Osage County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Lead Paint Test Kits — 69.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Osage County, Kansas
Overview
Osage County in Kansas covers 9 ZIP codes with an average Home Safety Score of B (75/100).
9 of 9 ZIP codes have recorded EPA violations. 8 health-based violations have been documented.
← Back to Kansas 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.