Maunaolu Plantation
EPA ID: HI0000254 · 100 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Maunaolu Plantation (HI0000254): no EPA violations recorded in the last five years. In every reporting cycle over the past five years, Maunaolu Plantation has come through without a single EPA violation - a consistent performance across the full service population of approximately 100 residents that reflects both well-maintained infrastructure and reliable operational oversight.
Data: EPA SDWIS
Service Area Map
Coverage area for Maunaolu Plantation Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Maunaolu Plantation serves a community with a median household income of $105,942 and an estimated 18,782 residents across its service area. Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Maunaolu Plantation'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.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Hawaii
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
Maunaolu Plantation (EPA ID: HI0000254) is a community water system in Hawaii that serves approximately 100 people from groundwater sources.
This system serves ZIP code 96768 in Makawao.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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 HI or modeled from parcel and building-footprint data.
- 96768 - Makawao
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Maunaolu Plantation (HI0000254) on EPA.gov.
Frequently Asked Questions
Is Maunaolu Plantation water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Maunaolu Plantation in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Maunaolu Plantation serve?
Maunaolu Plantation serves approximately 100 people across 1 ZIP code in Hawaii.
Where does Maunaolu Plantation get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Maunaolu Plantation Water Quality Report, HI. https://zipcheckup.com/water-system/hi0000254/
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title = {{Maunaolu Plantation Water Quality Report, HI}},
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url = {https://zipcheckup.com/water-system/hi0000254/}
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