Lyon County, Nevada
6 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
While Lyon County avoids the worst tiers, a portion of its 6 ZIP codes have logged violations.
How Lyon County Compares
How Lyon County Compares
Lyon County scores 21 points below the Nevada state average (81/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Lyon County, Nevada
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.1 (asthma 10.9%, diabetes 12.8%)
Estimated additional annual cost per homeowner: $1,057, driven primarily by wildfire
Infrastructure: 0.277% avg pipe failure probability
42.7% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Lyon County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 4 total (4 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: $1,057
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
23,920 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 | YERINGTON CITY OF | 5,050 | 11 |
| 2 | Weed Heights Development | 340 | 11 |
| 3 | Fernley Public Works | 23,064 | 2 |
| 4 | Dayton Valley Water System | 16,000 | 0 |
| 5 | Silver Springs Mutual Water Company | 3,070 | 0 |
All ZIP Codes in Lyon County
6 ZIP codes tracked in Lyon County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 89403 | Dayton | 70 | B | 0 | $392K |
| 2 | 89408 | Fernley | 69 | C | 2 (1 health) | $353K |
| 3 | 89447 | Yerington | 69 | C | 11 (1 health) | $244K |
| 4 | 89429 | Silver Springs | 56 | C | 0 | $265K |
| 5 | 89442 | Wadsworth | 53 | D | 0 | $117K |
| 6 | 89427 | Schurz | 40 | D | 0 | $87K |
Recommended Buyer Guides for Lyon 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 Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Lyon County, Nevada
Overview
Lyon County in Nevada covers 6 ZIP codes with an average Home Safety Score of C (60/100).
2 of 6 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Nevada 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.