Washoe County, Nevada
38 ZIP codes · Avg score 78/100 · Grade B · Updated 2026-06-03
Based on current EPA data, Washoe County's 38 ZIP codes maintain an above-average drinking water safety record.
How Washoe County Compares
How Washoe County Compares
Washoe County scores 3 points below the Nevada state average (81/100) and 10 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Washoe County, Nevada
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.5 (asthma 10.3%, diabetes 10%)
Estimated additional annual cost per homeowner: $1,884, driven primarily by wildfire
Infrastructure: 0.302% avg pipe failure probability, 8% of ZIPs at high risk
45.9% 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: $1,884
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
195,937 housing units in Washoe 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 Washoe County
Remediation costs are relatively manageable for most homeowners in Washoe 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 Washoe 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 Washoe County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | TRUCKEE MEADOWS WATER AUTHORITY | 442,000 | 57 |
| 2 | Great Basin Water Company Spanish Springs | 1,460 | 54 |
| 3 | Verdi Meadows Utility Company Inc. | 510 | 48 |
| 4 | Great Basin Water Company Cold Springs | 9,650 | 48 |
| 5 | Steamboat Springs Waterworks Inc. | 998 | 48 |
12 total water systems serve Washoe County.
All ZIP Codes in Washoe County
38 ZIP codes tracked in Washoe County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 89433 | Sun Valley | 83 | B | 0 | $321K |
| 2 | 89439 | Verdi | 83 | B | 0 | $763K |
| 3 | 89432 | Sparks | 82 | B | 3 | — |
| 4 | 89435 | Sparks | 82 | B | 3 | — |
| 5 | 89436 | Sparks | 82 | B | 3 | $547K |
| 6 | 89441 | Sparks | 82 | B | 3 | $624K |
| 7 | 89504 | Reno | 82 | B | 2 (1 health) | — |
| 8 | 89505 | Reno | 82 | B | 2 (1 health) | — |
| 9 | 89507 | Reno | 82 | B | 2 (1 health) | — |
| 10 | 89508 | Reno | 82 | B | 2 (1 health) | $430K |
| 11 | 89510 | Reno | 82 | B | 2 (1 health) | $570K |
| 12 | 89512 | Reno | 82 | B | 2 (1 health) | $318K |
| 13 | 89513 | Reno | 82 | B | 2 (1 health) | — |
| 14 | 89515 | Reno | 82 | B | 2 (1 health) | — |
| 15 | 89520 | Reno | 82 | B | 2 (1 health) | — |
| 16 | 89533 | Reno | 82 | B | 2 (1 health) | — |
| 17 | 89555 | Reno | 82 | B | 2 (1 health) | — |
| 18 | 89557 | Reno | 82 | B | 2 (1 health) | — |
| 19 | 89570 | Reno | 82 | B | 2 (1 health) | — |
| 20 | 89595 | Reno | 82 | B | 2 (1 health) | — |
| 21 | 89599 | Reno | 82 | B | 2 (1 health) | — |
| 22 | 89450 | Incline Village | 80 | B | 3 | — |
| 23 | 89452 | Incline Village | 80 | B | 3 | — |
| 24 | 89501 | Reno | 77 | B | 2 (1 health) | $380K |
| 25 | 89503 | Reno | 77 | B | 2 (1 health) | $442K |
| 26 | 89509 | Reno | 77 | B | 2 (1 health) | $671K |
| 27 | 89511 | Reno | 77 | B | 2 (1 health) | $903K |
| 28 | 89519 | Reno | 77 | B | 2 (1 health) | $870K |
| 29 | 89521 | Reno | 77 | B | 2 (1 health) | $630K |
| 30 | 89523 | Reno | 77 | B | 2 (1 health) | $569K |
| 31 | 89451 | Incline Village | 75 | B | 3 | $1325K |
| 32 | 89502 | Reno | 72 | B | 2 (1 health) | $389K |
| 33 | 89506 | Reno | 72 | B | 2 (1 health) | $378K |
| 34 | 89405 | Empire | 71 | B | 22 | — |
| 35 | 89412 | Gerlach | 68 | C | 24 | — |
| 36 | 89431 | Sparks | 67 | C | 3 | $332K |
| 37 | 89402 | Crystal Bay | 53 | D | 0 | $2000K |
| 38 | 89424 | Nixon | 53 | D | 0 | $54K |
Recommended Buyer Guides for Washoe County
Below: editorial picks, no sponsored placements.
- 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 Washoe County, Nevada
Overview
Washoe County in Nevada covers 38 ZIP codes with an average Home Safety Score of B (78/100).
34 of 38 ZIP codes have recorded EPA violations. 24 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.