Yacolt
EPA ID: WA5399000 · 3,034 people served · 18 ZIP codes
Federal monitoring spanning five full years has produced zero violations at Yacolt — a clean record across every reporting cycle for a utility serving approximately 3,034 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Yacolt Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Yacolt serves a community with a median household income of $91,883 and an estimated 422,089 residents across its service area. Approximately 45% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Yacolt's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in Clark County, Washington 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 67th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 88 detections recorded. 30 exceed federal EPA limits (4 ppt for PFOA/PFOS). 12 exceed state limits.
Comparable Water Systems
Similar-sized systems in Washington
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
Yacolt (EPA ID: WA5399000) is a community water system in Washington that serves approximately 3,034 people from groundwater sources.
This system provides water to 18 ZIP codes across 5 communities.
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
Coverage: 4 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 14 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 98601 — Amboy
- 98604 — Battle Ground
- 98660 — Vancouver
- 98661 — Vancouver
- 98662 — Vancouver
- 98663 — Vancouver
- 98664 — Vancouver
- 98665 — Vancouver
- 98666 — Vancouver
- 98668 — Vancouver
- 98674 — Woodland
- 98675 — Yacolt
- 98682 — Vancouver
- 98683 — Vancouver
- 98684 — Vancouver
- 98685 — Vancouver
- 98686 — Vancouver
- 98687 — Vancouver
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Yacolt (WA5399000) on EPA.gov.
Frequently Asked Questions
Is Yacolt water safe to drink?
Based on EPA records, Yacolt has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Yacolt serve?
Yacolt serves approximately 3,034 people across 18 ZIP codes in Washington.
Where does Yacolt get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.