Clackamas County, Oregon
27 ZIP codes · Avg score 84/100 · Grade B · Updated 2026-06-03
Covering 27 ZIP codes, Clackamas County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Clackamas County Compares
How Clackamas County Compares
Clackamas County scores 6 points above the Oregon state average (78/100) and 16 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Clackamas County, Oregon
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.1 (asthma 11.6%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $1,514, driven primarily by flood
Infrastructure: 0.365% avg pipe failure probability, 31% of ZIPs at high risk
51.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Clackamas County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 42 violations. Past 5 years: 85 total (85 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: $1,514
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
190,211 housing units in Clackamas 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 Clackamas County
Remediation costs are relatively manageable for most homeowners in Clackamas 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 Clackamas 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 Clackamas County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Colton Water District | 1,500 | 113 |
| 2 | Timberline Rim Water Company Inc. | 800 | 72 |
| 3 | City of Molalla, | 10,298 | 54 |
| 4 | Canby Regency | 265 | 54 |
| 5 | Petes Mountain Water Company | 250 | 54 |
77 total water systems serve Clackamas County.
All ZIP Codes in Clackamas County
27 ZIP codes tracked in Clackamas County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 97028 | Government Camp | 98 | A | 2 | — |
| 2 | 97017 | Colton | 97 | A | 30 (2 health) | $591K |
| 3 | 97009 | Boring | 94 | A | 5 (1 health) | $616K |
| 4 | 97206 | Portland | 94 | A | 2 | $481K |
| 5 | 97208 | Portland | 94 | A | 2 | — |
| 6 | 97023 | Estacada | 93 | A | 9 (2 health) | $531K |
| 7 | 97086 | Happy Valley | 92 | A | 9 (3 health) | $656K |
| 8 | 97042 | Mulino | 89 | A | 20 (1 health) | $657K |
| 9 | 97049 | Rhododendron | 89 | A | 2 (1 health) | $472K |
| 10 | 97089 | Damascus | 89 | A | 2 | $617K |
| 11 | 97011 | Brightwood | 88 | A | 4 | $586K |
| 12 | 97013 | Canby | 88 | A | 5 | $509K |
| 13 | 97035 | Lake Oswego | 88 | A | 5 | $791K |
| 14 | 97015 | Clackamas | 86 | A | 6 | $491K |
| 15 | 97070 | Wilsonville | 86 | A | 7 | $601K |
| 16 | 97222 | Portland | 84 | B | 2 | $465K |
| 17 | 97267 | Portland | 84 | B | 2 | $489K |
| 18 | 97034 | Lake Oswego | 83 | B | 5 | $996K |
| 19 | 97045 | Oregon City | 80 | B | 12 (2 health) | $564K |
| 20 | 97027 | Gladstone | 78 | B | 6 (3 health) | $465K |
| 21 | 97038 | Molalla | 78 | B | 54 (3 health) | $452K |
| 22 | 97067 | Welches | 78 | B | 12 | $362K |
| 23 | 97068 | West Linn | 73 | B | 18 | $761K |
| 24 | 97004 | Beavercreek | 66 | C | 0 | $691K |
| 25 | 97036 | Marylhurst | 66 | C | 0 | — |
| 26 | 97055 | Sandy | 66 | C | 35 (4 health) | $473K |
| 27 | 97022 | Eagle Creek | 65 | C | 8 | $588K |
Recommended Buyer Guides for Clackamas County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Lead Paint Test Kits — 51.8% 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 Clackamas County, Oregon
Overview
Clackamas County in Oregon covers 27 ZIP codes with an average Home Safety Score of B (84/100).
25 of 27 ZIP codes have recorded EPA violations. 22 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.