Holly Hill Estates
EPA ID: DE0000939 · 831 people served · 1 ZIP code
Water monitoring history at Holly Hill Estates shows a clean slate — EPA tracking over the past five years turned up no violations, and 831 residents continue to receive fully compliant service.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Holly Hill Estates Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Holly Hill Estates serves a community with a median household income of $78,803 and an estimated 27,164 residents across its service area.
💧 Where Does Your Water Come From?
Holly Hill 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 0% of homes in Kent County, Delaware 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 80th 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. 5 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Comparable Water Systems
Similar-sized systems in Delaware
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
Holly Hill Estates (EPA ID: DE0000939) is a community water system in Delaware that serves approximately 831 people from groundwater sources.
This system serves ZIP code 19977 in Smyrna.
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 DE or modeled from parcel and building-footprint data.
- 19977 — Smyrna
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Holly Hill Estates (DE0000939) on EPA.gov.
Frequently Asked Questions
Is Holly Hill Estates water safe to drink?
Based on EPA records, Holly Hill Estates has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Holly Hill Estates serve?
Holly Hill Estates serves approximately 831 people across 1 ZIP code in Delaware.
Where does Holly Hill 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: 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.