Lyon County, Kansas
7 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
The 7 water systems serving Lyon County show strong compliance with federal drinking water standards.
How Lyon County Compares
How Lyon County Compares
Lyon County scores 16 points above the Kansas state average (64/100) and 12 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Lyon County, Kansas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10%, diabetes 11.5%)
Estimated additional annual cost per homeowner: $939, driven primarily by wildfire
Infrastructure: 0.4% avg pipe failure probability, 29% of ZIPs at high risk
70.4% 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: $939
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
14,695 housing units in Lyon 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 Lyon County
Remediation costs are relatively manageable for most homeowners in Lyon 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 Lyon 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 Lyon County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Lyon Company Rwd 5 | 1,310 | 20 |
| 2 | Lyon Company Rwd 3 | 479 | 19 |
| 3 | Coffey Company Rwd 2 | 1,146 | 19 |
| 4 | Lyon Company Rwd 4 | 980 | 19 |
| 5 | Lyon Company Rwd 1 | 1,595 | 13 |
14 total water systems serve Lyon County.
All ZIP Codes in Lyon County
7 ZIP codes tracked in Lyon County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 66833 | Allen | 83 | B | 0 | $80K |
| 2 | 66830 | Admire | 82 | B | 3 | $103K |
| 3 | 66865 | Olpe | 82 | B | 2 | $195K |
| 4 | 66854 | Hartford | 81 | B | 2 | $85K |
| 5 | 66864 | Neosho Rapids | 81 | B | 2 | $61K |
| 6 | 66868 | Reading | 79 | B | 2 | — |
| 7 | 66801 | Emporia | 69 | C | 11 (4 health) | $144K |
Recommended Buyer Guides for Lyon County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 70.4% 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 Lyon County, Kansas
Overview
Lyon County in Kansas covers 7 ZIP codes with an average Home Safety Score of B (80/100).
6 of 7 ZIP codes have recorded EPA violations. 4 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.