Coos County, Oregon
9 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
Based on current EPA data, Coos County's 9 ZIP codes maintain an above-average drinking water safety record.
How Coos County Compares
How Coos County Compares
Coos County scores 3 points above the Oregon state average (78/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Coos County, Oregon
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.1 (asthma 12.4%, diabetes 14.2%)
Estimated additional annual cost per homeowner: $1,486, driven primarily by flood
Infrastructure: 0.459% avg pipe failure probability, 75% of ZIPs at high risk
73.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Coos County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 11 violations. Past 5 years: 34 total (34 health-based).
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: $1,486
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
31,473 housing units in Coos 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 Coos County
Remediation costs are relatively manageable for most homeowners in Coos 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 Coos 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 Coos County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Coquille, | 3,953 | 155 |
| 2 | Coos Bay North Bend Wtr Brd | 34,500 | 138 |
| 3 | Bandon Coastal Dunes | 225 | 117 |
| 4 | Sumner Water Corporation | 50 | 97 |
| 5 | Country Club Estates Water District | 45 | 97 |
21 total water systems serve Coos County.
All ZIP Codes in Coos County
9 ZIP codes tracked in Coos County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97449 | Lakeside | 95 | A | 1 | $293K |
| 2 | 97466 | Powers | 95 | A | 1 | $221K |
| 3 | 97423 | Coquille | 90 | A | 36 (2 health) | $266K |
| 4 | 97459 | North Bend | 86 | A | 21 (1 health) | $350K |
| 5 | 97420 | Coos Bay | 81 | B | 97 (1 health) | $282K |
| 6 | 97411 | Bandon | 77 | B | 20 | $426K |
| 7 | 97458 | Myrtle Point | 76 | B | 22 | $251K |
| 8 | 97407 | Allegany | 66 | C | 0 | — |
| 9 | 97414 | Broadbent | 66 | C | 0 | $234K |
Recommended Buyer Guides for Coos County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 73.3% 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 Coos County, Oregon
Overview
Coos County in Oregon covers 9 ZIP codes with an average Home Safety Score of B (81/100).
7 of 9 ZIP codes have recorded EPA violations. 4 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.