Ninole
EPA ID: HI0000103 · 151 people served · 1 ZIP code
Although compliance varies widely among water utilities nationally, Ninole stands out with zero EPA violations over five consecutive monitoring years, delivering safe tap water to 151 residents and showing no enforcement activity across the entire reporting span.
Data: EPA SDWIS Last verified: 2026-04-02
💧 Where Does Your Water Come From?
Ninole'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 5% of homes in Hawaii County, Hawaii 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 Hawaii
System Overview
Ninole (EPA ID: HI0000103) is a community water system in Hawaii that serves approximately 151 people from groundwater sources.
This system serves ZIP code 96773 in Ninole.
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
- 96773 — Ninole
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Ninole (HI0000103) on EPA.gov.
Frequently Asked Questions
Is Ninole water safe to drink?
Based on EPA records, Ninole has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Ninole serve?
Ninole serves approximately 151 people across 1 ZIP code in Hawaii.
Where does Ninole 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.