Lake Oswego - Tigard Water Supply
EPA ID: OR4101542 · 0 people served · 1 ZIP code
In every reporting cycle over the past five years, Lake Oswego - Tigard Water Supply has come through without a single EPA violation — a consistent performance across the full service population of approximately 0 residents that reflects both well-maintained infrastructure and reliable operational oversight.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Demographics
The Lake Oswego - Tigard Water Supply serves a community with a median household income of $145,877 and an estimated 30,254 residents across its service area. Approximately 48% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Lake Oswego - Tigard Water Supply's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in Clackamas County, Oregon rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Oregon
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Lake Oswego - Tigard Water Supply (EPA ID: OR4101542) is a community water system in Oregon that serves approximately 0 people from surface water sources.
This system serves ZIP code 97068 in West Linn.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
- 97068 — West Linn
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Lake Oswego - Tigard Water Supply (OR4101542) on EPA.gov.
Frequently Asked Questions
Is Lake Oswego - Tigard Water Supply water safe to drink?
Based on EPA records, Lake Oswego - Tigard Water Supply has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Lake Oswego - Tigard Water Supply serve?
Lake Oswego - Tigard Water Supply serves approximately 0 people across 1 ZIP code in Oregon.
Where does Lake Oswego - Tigard Water Supply get its water?
The primary water source is surface water.