Willow Oak Estates
EPA ID: FL6534994 · 108 people served · 1 ZIP code
Five years of EPA monitoring have produced no violations for Willow Oak Estates — the supplier serving 108 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
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 1 (2021) to 2 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Willow Oak Estates Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Willow Oak Estates serves a community with a median household income of $62,779 and an estimated 25,617 residents across its service area.
Environmental Justice Note: 55% 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?
Willow Oak Estates'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 Polk County, Florida rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Comparable Water Systems
Similar-sized systems in Florida
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
Willow Oak Estates (EPA ID: FL6534994) is a community water system in Florida that serves approximately 108 people from groundwater sources.
This system serves ZIP code 33860 in Mulberry.
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: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by FL or modeled from parcel and building-footprint data.
- 33860 — Mulberry
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Willow Oak Estates (FL6534994) on EPA.gov.
Frequently Asked Questions
Is Willow Oak Estates water safe to drink?
Based on EPA records, Willow Oak Estates has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Willow Oak Estates serve?
Willow Oak Estates serves approximately 108 people across 1 ZIP code in Florida.
Where does Willow Oak Estates 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: FDEP PWS Lead Service Line Inventories (LSLI) · Submitted 2025
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.