Douglas County, Nevada
11 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
Covering 11 ZIP codes, Douglas County falls in the average tier for tap water safety — violations appear in a meaningful share of areas, and the data suggests quality depends heavily on which specific part of the county a household sits in.
How Douglas County Compares
How Douglas County Compares
Douglas County scores 22 points below the Nevada state average (81/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Douglas County, Nevada
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.3 (asthma 10.2%, diabetes 12%)
Estimated additional annual cost per homeowner: $2,173, driven primarily by wildfire
Infrastructure: 0.331% avg pipe failure probability, 18% of ZIPs at high risk
52.5% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Douglas County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 10 violations. Past 5 years: 18 total (18 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: $2,173
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
27,317 housing units in Douglas 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 Douglas County
Remediation costs are relatively manageable for most homeowners in Douglas 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 Douglas 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 Douglas County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Zephyr Cove Water Utility Distr | 1,209 | 20 |
| 2 | Kingsbury Gid | 3,839 | 19 |
| 3 | Round Hill Gid | 1,200 | 17 |
| 4 | Elk Point Country Club | 325 | 17 |
| 5 | Cave Rock Skyland | 1,267 | 16 |
21 total water systems serve Douglas County.
All ZIP Codes in Douglas County
11 ZIP codes tracked in Douglas County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 89444 | Wellington | 68 | C | 5 | $445K |
| 2 | 89705 | Carson City | 66 | C | 1 | $456K |
| 3 | 89413 | Glenbrook | 65 | C | 2 (1 health) | $2000K |
| 4 | 89423 | Minden | 65 | C | 1 | $647K |
| 5 | 89449 | Stateline | 65 | C | 4 | $791K |
| 6 | 89448 | Zephyr Cove | 63 | C | 13 (4 health) | $1337K |
| 7 | 89410 | Gardnerville | 61 | C | 5 | $588K |
| 8 | 89460 | Gardnerville | 56 | C | 5 | $486K |
| 9 | 89430 | Smith | 53 | D | 0 | $671K |
| 10 | 89411 | Genoa | 45 | D | 0 | $1067K |
| 11 | 89704 | Washoe Valley | 45 | D | 0 | $609K |
Recommended Buyer Guides for Douglas County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 52.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Douglas County, Nevada
Overview
Douglas County in Nevada covers 11 ZIP codes with an average Home Safety Score of C (59/100).
8 of 11 ZIP codes have recorded EPA violations. 5 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.