Eldorado
EPA ID: OK3003301 · 446 people served · 1 ZIP code
Eldorado's five-year compliance history is clean by every EPA metric — no health-based violations, no monitoring lapses, no enforcement actions on record, reflecting consistent performance for a utility that supplies water to approximately 446 residents year after year.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 5 (2024) to 4 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Eldorado Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Eldorado serves a community with a median household income of $68,036 and an estimated 503 residents across its service area. Approximately 88% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 63% 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?
Eldorado'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 Jackson County, Oklahoma rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Oklahoma
System Overview
Eldorado (EPA ID: OK3003301) is a community water system in Oklahoma that serves approximately 446 people from surface water sources.
This system serves ZIP code 73537 in Eldorado.
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
- 73537 — Eldorado
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Eldorado (OK3003301) on EPA.gov.
Frequently Asked Questions
Is Eldorado water safe to drink?
Based on EPA records, Eldorado has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Eldorado serve?
Eldorado serves approximately 446 people across 1 ZIP code in Oklahoma.
Where does Eldorado get its water?
The primary water source is surface water.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
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.