Gilliam County, Oregon
3 ZIP codes · Avg score 71/100 · Grade B · Updated 2026-06-03
Tracking 3 ZIP codes in Gilliam County shows a water safety record well above the national median — violations are isolated exceptions, not recurring patterns.
How Gilliam County Compares
How Gilliam County Compares
Gilliam County scores 7 points below the Oregon state average (78/100) and 3 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 15.5 (asthma 12.3%, diabetes 14.8%)
Estimated additional annual cost per homeowner: $827, driven primarily by energy_code_gap
Infrastructure: 0.41% avg pipe failure probability, 100% of ZIPs at high risk
70% 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: $827
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,056 housing units in Gilliam 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 Gilliam County
Remediation costs are relatively manageable for most homeowners in Gilliam 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 Gilliam County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in Gilliam County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Condon, | 742 | 7 |
| 2 | Condon Heights Ws | 33 | 7 |
| 3 | Arlington City Water Supply | 628 | 4 |
All ZIP Codes in Gilliam County
3 ZIP codes tracked in Gilliam County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97812 | Arlington | 81 | B | 4 | $198K |
| 2 | 97823 | Condon | 78 | B | 7 | $145K |
| 3 | 97861 | Mikkalo | 53 | D | 0 | — |
Recommended Buyer Guides for Gilliam County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 70% of homes built before 1978
Overview
Gilliam County in Oregon covers 3 ZIP codes with an average Home Safety Score of B (71/100).
2 of 3 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.