Columbia County, Oregon
7 ZIP codes · Avg score 75/100 · Grade B · Updated
ZipCheckup grade for Columbia County: B.
This ZIP looks solid, with a few items worth a quick check.
In current tracking cycles, Columbia County - spanning 7 ZIP codes - records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Columbia County Compares
How Columbia County Compares
Columbia County scores 10 points below the Oregon state average (85/100) and 2 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Columbia County, Oregon
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.4 (asthma 12.2%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $2,020, driven primarily by flood
57% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Columbia County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 12 violations. Past 5 years: 28 total (28 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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,020
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
21,834 housing units in Columbia 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 Columbia County
Remediation costs are relatively manageable for most homeowners in Columbia 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 Columbia County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Columbia County
7 community water systems serving Columbia County.
- B
- B
- B
- B
Show all 7 water systems
Systems with the most violations in Columbia County
5 water systems with recorded EPA violations.
- B
- B
- B
All ZIP Codes in Columbia County
7 ZIP codes tracked in Columbia County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97051 | Saint Helens | 76 | B | 31 | $369K |
| 2 | 97056 | Scappoose | 74 | B | 36 (1 health) | $438K |
| 3 | 97016 | Clatskanie | — | — | 34 | $297K |
| 4 | 97018 | Columbia City | — | — | $442K | |
| 5 | 97048 | Rainier | — | — | 62 | $364K |
| 6 | 97053 | Warren | — | — | 31 | $532K |
| 7 | 97064 | Vernonia | — | — | $360K |
Recommended Buyer Guides for Columbia County
Below: editorial picks, no sponsored placements.
- Best Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Lead Paint Test Kits — 57% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Columbia County, Oregon
Overview
Columbia County in Oregon covers 7 tracked ZIP records with an average Home Safety Score of B (75/100) across 2 scored records.
5 of 5 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
← Back to Oregon Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.