COUNTY REPORT OR

Washington County, Oregon

27 ZIP codes · Avg score 79/100 · Grade B

ZipCheckup grade for Washington County: B.

This ZIP has a few items worth a quick check.

Looking at the composite Home Safety Score, Washington County comes out in the A-B range, and the reports for its 27 ZIP codes show which data sit behind that result.

How Washington County Compares

Washington County79/100
Oregon avg85/100
National avg73/100

How Washington County Compares

B
County Grade
79/100
Avg Safety Score
27
ZIP Codes
20
Water Systems

Washington County scores 6 points below the Oregon state average (85/100) and 6 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

B
County Grade
79
Avg Safety Score
27
ZIP Codes
Best ZIP: 97003 (83/100)
Lowest ZIP: 97123 (67/100)
$566K
Median Home Value
$460
Avg Remediation (0.08% of home value)

ZIP Code Risk Map

Water Quality Map: Washington County, Oregon

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 11 (asthma 11.2%, diabetes 9.9%)

Modeled additional annual cost estimate per homeowner: $946, largest modeled factor: Flood

37% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 11.2% (national: 8.9%)
Diabetes 9.9% (national: 10.5%)
Obesity 32.4% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1985
Median Build Year
37%
Pre-1980 Housing
37/100
Infrastructure Stress Indicator
37%
ZIPs with High Infrastructure Stress
Moderate
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $946

Flood $670/yr
Energy Code Gap $376/yr
Water / Lead $83/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

242,825 housing units in Washington County

Pre-1940 3%
1940–1959 7%
1960–1979 27%
1980–1999 35%
2000+ 28%

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 Washington County

$566K
Median Home Value
$460
Est. Remediation Cost
0.1%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Washington County can be compared with the median property value; actual costs vary by property.

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 Washington County residents

Asthma 11.2% (US avg: 8.9%)
Diabetes 9.9% (US avg: 11%)
Obesity 32.4% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Washington County ZIP codes

8 community water systems mapped to Washington County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

20 water systems mapped to Washington County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Washington County

5 water systems with violations in EPA records.

All ZIP Codes in Washington County

27 ZIP codes tracked in Washington County.

# ZIP Code City Safety Score Grade Violations Home Value
1 97003 Beaverton 83 B 2 $458K
2 97006 Beaverton 83 B 2 $536K
3 97078 First Consumers Nat Bank 83 B 2 $463K
4 97229 Portland 83 B 1 $729K
5 97005 Beaverton 82 B 3 $476K
6 97007 Beaverton 82 B 13 $583K
7 97008 Beaverton 82 B 3 $555K
8 97062 Tualatin 82 B 41 $608K
9 97223 Portland 82 B 15 $578K
10 97224 Portland 82 B 13 $579K
11 97225 Portland 82 B 4 $710K
12 97124 Hillsboro 81 B 6 $519K
13 97140 Sherwood 77 B 26 (1 health) $618K
14 97117 Gales Creek 75 B 26 $603K
15 97113 Cornelius 67 C 59 (2 health) $434K
16 97116 Forest Grove 67 C 60 (3 health) $480K
17 97123 Hillsboro 67 C 33 (2 health) $489K
18 97075 Beaverton — — —
19 97076 Beaverton — — —
20 97077 Beaverton — — —
21 97106 Banks — — $513K
22 97109 Buxton — — $577K
23 97119 Gaston — — 62 (2 health) $591K
24 97125 Manning — — —
25 97133 North Plains — — $644K
26 97144 Timber — — $527K
27 97207 Portland — — —

Recommended Buyer Guides for Washington County

Up to five guides, picked by rule.

Overview

Washington County in Oregon covers 27 tracked ZIP records with an average Home Safety Score of B (79/100) across 17 scored records.

18 of 18 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 health-based violations appear in the available health breakdown.

← Back to Oregon Home Safety Profile

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Washington County?
Washington County receives an average Home Safety grade of B from its scored ZIP records (27 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve Washington County?
We map 20 public water systems to 27 ZIP codes in our data for Washington County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Washington County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Washington County is flood. Across all modeled risk factors, the estimated average additional annual cost is $946 per homeowner; actual costs vary by home.
How old are homes in Washington County?
The median home build year in Washington County is 1985. 37% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Washington County compare to Oregon?
Washington County has an average Home Safety Score of 79/100 under model 4.0.0, which is below the Oregon state average of 85/100.

How to cite this page

APA ZipCheckup. (2026). Washington County, OR: HSS 79/100; PFAS Found in Water. https://zipcheckup.com/county/oregon/washington/
BibTeX
@misc{zipcheckup-county-oregon-washington,
  author = {{ZipCheckup}},
  title  = {{Washington County, OR: HSS 79/100; PFAS Found in Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/oregon/washington/}
}

Page version: October 2026.

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