Kailua
EPA ID: HI0000203 · 90 people served · 1 ZIP code
Federal monitoring spanning five full years has produced zero violations at Kailua — a clean record across every reporting cycle for a utility serving approximately 90 residents.
Data: EPA SDWIS Last verified: 2026-04-02
💧 Where Does Your Water Come From?
Kailua'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 Maui County, Hawaii rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Comparable Water Systems
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System Overview
Kailua (EPA ID: HI0000203) is a community water system in Hawaii that serves approximately 90 people from groundwater sources.
This system serves ZIP code 96784 in Puunene.
Average Home Safety Score: A (88/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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
- 96784 — Puunene
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Kailua (HI0000203) on EPA.gov.
Frequently Asked Questions
Is Kailua water safe to drink?
Based on EPA records, Kailua has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Kailua serve?
Kailua serves approximately 90 people across 1 ZIP code in Hawaii.
Where does Kailua 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.