Quapaw
EPA ID: OK2005811 · 906 people served · 1 ZIP code
Quapaw carries zero EPA violations in five years — a spotless record for a utility serving 906 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Quapaw Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Quapaw serves a community with a median household income of $54,741 and an estimated 2,646 residents across its service area. Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% 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?
Quapaw'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 2% of homes in Ottawa County, Oklahoma 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 Oklahoma
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
Quapaw (EPA ID: OK2005811) is a community water system in Oklahoma that serves approximately 906 people from groundwater sources.
This system serves ZIP code 74363 in Quapaw.
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
- 74363 — Quapaw
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Quapaw (OK2005811) on EPA.gov.
Frequently Asked Questions
Is Quapaw water safe to drink?
Based on EPA records, Quapaw has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Quapaw serve?
Quapaw serves approximately 906 people across 1 ZIP code in Oklahoma.
Where does Quapaw get its water?
The primary water source is groundwater.