Clatsop County, Oregon
7 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Across Clatsop County, EPA compliance data for 7 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Clatsop County Compares
How Clatsop County Compares
Clatsop County scores 10 points below the Oregon state average (78/100) and 0 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Clatsop County, Oregon
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.9 (asthma 12.1%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $1,934, driven primarily by flood
Infrastructure: 0.37% avg pipe failure probability, 43% of ZIPs at high risk
58.7% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↓ Improving trendEPA violation counts by year across Clatsop County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 4 violations. Past 5 years: 8 total (8 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,934
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
22,537 housing units in Clatsop 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 Clatsop County
Remediation costs are relatively manageable for most homeowners in Clatsop 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 Clatsop 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 Clatsop County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Seaside Water Department | 7,482 | 65 |
| 2 | Elderberry Nehalem Ws | 160 | 65 |
| 3 | Maple Elsie Water Service | 100 | 65 |
| 4 | Youngs River Lewis & Clark Water District | 2,580 | 18 |
| 5 | WARRENTON, CITY OF | 9,100 | 18 |
12 total water systems serve Clatsop County.
All ZIP Codes in Clatsop County
7 ZIP codes tracked in Clatsop County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97146 | Warrenton | 83 | B | 1 | $440K |
| 2 | 97102 | Arch Cape | 77 | B | 8 (1 health) | $546K |
| 3 | 97110 | Cannon Beach | 74 | B | 6 | $740K |
| 4 | 97103 | Astoria | 68 | C | 17 | $438K |
| 5 | 97145 | Tolovana Park | 63 | C | 0 | $694K |
| 6 | 97138 | Seaside | 60 | C | 65 (7 health) | $433K |
| 7 | 97121 | Hammond | 53 | D | 0 | $385K |
Recommended Buyer Guides for Clatsop County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Lead Paint Test Kits — 58.7% 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 Clatsop County, Oregon
Overview
Clatsop County in Oregon covers 7 ZIP codes with an average Home Safety Score of C (68/100).
5 of 7 ZIP codes have recorded EPA violations. 8 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.