CITY REPORT OR HEALTH VIOLATIONS: 2

Hillsboro, OR: 2 Health Violations - Home Safety 74/100

2 ZIP codes · 5 water systems · Updated

ZipCheckup grade for Hillsboro: B.

This ZIP has a few items worth a quick check.

Based on available records, Hillsboro, OR holds an A or B ZipCheckup grade.

How Hillsboro Compares

Hillsboro74/100
Oregon avg85/100
National avg73/100

Data: EPA SDWIS

2
ZIP Codes
5
Water Systems
2
ZIPs Linked to Systems with Violations
B · 74
Avg Safety Score
Zone 2
County Radon Potential (Moderate)
$519K
Median Home Value
$300
Est. Remediation (0.1% of home value)

Hillsboro Water: The Quick Version

  • Your city's water systems recorded 33 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.0045 mg/L.
  • Homes built before 1986: 37% - older plumbing may contain lead solder.
  • Estimated remediation: $300 per household.
  • Health risk index (ZipCheckup composite of CDC data): 10.99.

Water Systems Serving Hillsboro

Sorted by reported population served, the top 3 of 5 public water systems mapped to Hillsboro, OR appear below, each with its own federal compliance record.

Overview

We track home safety data for 2 ZIP codes in Hillsboro, Oregon (population ~102,973), covering 5 community water systems serving approximately 332,172 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 2 ZIP codes.

2 of 2 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 2 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Hillsboro: B (74/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Hillsboro water systems draw from: Groundwater, Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0045 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

2 of 2 ZIP records with known zones are in EPA Radon Zone 2.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Top Contaminants

Contaminant Category Violations ZIPs Affected
Groundwater Rule Treatment Technique 28 1
Consumer Confidence Rule Reporting 18 2
Haloacetic Acids (HAA5) Disinfection Byproducts 5 2
Total Trihalomethanes (TTHM) Disinfection Byproducts 5 2
Public Notice Rule Reporting 4 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
97123 C 33 2 City of Hillsboro,
97124 B 6 0 City of Hillsboro,

All ZIP Codes in Hillsboro

  • 97123 [C] - 33 violations ⚠
  • 97124 [B] - 6 violations

Data Sources

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

CDC Health Data for Hillsboro

11.2%
Asthma (US: 9.8%)
9.9%
Diabetes (US: 10.4%)
16.1%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 11.2% ↑
Diabetes 9.9% ↓
Mental Health 16.1% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in Hillsboro

Groundwater Rule 28 violations
Treatment Technique
Consumer Confidence Rule 18 violations
Reporting
Haloacetic Acids (HAA5) 5 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.06 mg/L
Increased cancer risk with long-term exposure above the MCL

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

How Old Is Hillsboro's Housing Stock?

1996
Median Build Year
37%
Built Before 1986
16%
Built Before 1970
Copper
Likely Pipe Material

Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

A citywide median of 1996 for construction says little about any single address in Hillsboro. Homes built before 1986, when federal amendments restricted the lead content allowed in new pipe, solder and flux, may contain plumbing materials with more lead, and later renovations may have replaced them. An inspection of the plumbing can identify the materials, and sending a tap water sample to an accredited laboratory measures lead.

1996
Median Year Built
37%
Pre-1986 (lead solder era; lead paint banned 1978)
16%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (16%) 1970–1986 (21%) Post-1986 (63%)

Most homes in Hillsboro were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

Hillsboro: Remediation Cost in Perspective

Estimated remediation for Hillsboro is a small fraction of median property value - one percent or less - though the ratio does not describe any single household.

Median Home Value
$518,500
Est. Remediation
$300
Remediation as % of home value 0.1%

Estimated remediation costs in Hillsboro can be compared with local home values. The $150–$600 estimated range can be set against the median property value; actual costs vary by home. Home values are 28% above the Oregon average.

Protecting Children from Lead in Hillsboro

37%
Homes Built Before 1986
0.0045
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Hillsboro

33
Total FEMA Flood Claims
$17,032
Avg Reported Sum With Payment Data
100%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Hillsboro contains 33 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $17,032. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $300 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Deep Dive Reports

Detailed analysis for Hillsboro, OR

Frequently Asked Questions

What does the Home Safety Score mean for Hillsboro, OR?
Hillsboro has an average Home Safety Score of 74/100 (Grade B) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 33 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Hillsboro?
EPA records list 33 EPA violations, including 2 health-based violations for Hillsboro water systems. These water-system violations are shown for 2 mapped ZIP codes.
Does Hillsboro water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Hillsboro is 0.0045 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Hillsboro compare to Oregon average?
Hillsboro has an average Home Safety Score of 74/100, which is below the Oregon state average of 85/100 for the same model series.
How many water systems serve Hillsboro?
Our records map 5 water systems to 2 ZIP codes in Hillsboro. The related population figure in our data is approximately 102,973 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Hillsboro?
Estimated remediation cost per household in Hillsboro: $300; modeled range $150 to $600. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Hillsboro, OR: 2 Health Violations - Home Safety 74/100. https://zipcheckup.com/cities/or/hillsboro/
BibTeX 
@misc{zipcheckup-cities-or-hillsboro,
  author = {{ZipCheckup}},
  title  = {{Hillsboro, OR: 2 Health Violations - Home Safety 74/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/or/hillsboro/}
}

Page version: October 2026.

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