Oasis Water Corporation
EPA ID: WA5319069 · 556 people served · 2 ZIP codes
Zero violations in five consecutive years of EPA monitoring — Oasis Water Corporation has held a clean track record across every reporting cycle in that span, with no enforcement activity of any kind on file for the full service population of 556 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 91% chance of violation in next 12 months
Violations went from 2 (2022) to 4 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Oasis Water Corporation Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Oasis Water Corporation serves a community with a median household income of $82,517 and an estimated 86,467 residents across its service area. Approximately 40% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 42% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Oasis Water Corporation'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 Franklin 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 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
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
Oasis Water Corporation (EPA ID: WA5319069) is a community water system in Washington that serves approximately 556 people from groundwater sources.
This system provides water to 2 ZIP codes across 1 community.
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Oasis Water Corporation (WA5319069) on EPA.gov.
Frequently Asked Questions
Is Oasis Water Corporation water safe to drink?
Based on EPA records, Oasis Water Corporation has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Oasis Water Corporation serve?
Oasis Water Corporation serves approximately 556 people across 2 ZIP codes in Washington.
Where does Oasis Water Corporation get its water?
The primary water source is groundwater.