Wasco County, Oregon
8 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-03
In recent assessments, Wasco County's 8 ZIP codes record strong, consistent water safety outcomes.
How Wasco County Compares
How Wasco County Compares
Wasco County scores 6 points below the Oregon state average (78/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Wasco County, Oregon
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.2 (asthma 12.1%, diabetes 13.4%)
Estimated additional annual cost per homeowner: $1,953, driven primarily by wildfire
Infrastructure: 0.461% avg pipe failure probability, 75% of ZIPs at high risk
75.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Wasco County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 7 violations. Past 5 years: 19 total (19 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $1,953
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,145 housing units in Wasco 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 Wasco County
Remediation costs are relatively manageable for most homeowners in Wasco 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 Wasco 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 Wasco County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Tygh Valley Water District | 218 | 27 |
| 2 | Sportsmans Park Water Assn | 150 | 27 |
| 3 | City of Maupin, | 420 | 23 |
| 4 | Pine Grove Water District (wasco) | 140 | 23 |
| 5 | City of Dufur, | 610 | 16 |
14 total water systems serve Wasco County.
All ZIP Codes in Wasco County
8 ZIP codes tracked in Wasco County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97058 | The Dalles | 82 | B | 10 (1 health) | $333K |
| 2 | 97063 | Tygh Valley | 82 | B | 27 (1 health) | $274K |
| 3 | 97021 | Dufur | 81 | B | 16 (2 health) | $393K |
| 4 | 97037 | Maupin | 77 | B | 23 (2 health) | $291K |
| 5 | 97057 | Shaniko | 77 | B | 12 (2 health) | — |
| 6 | 97001 | Antelope | 74 | B | 12 (4 health) | — |
| 7 | 97033 | Kent | 53 | D | 0 | — |
| 8 | 97711 | Ashwood | 53 | D | 0 | — |
Recommended Buyer Guides for Wasco County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 75.1% 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 Wasco County, Oregon
Overview
Wasco County in Oregon covers 8 ZIP codes with an average Home Safety Score of B (72/100).
6 of 8 ZIP codes have recorded EPA violations. 12 health-based violations have been documented.
← Back to Oregon 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.