ZipCheckup grade for 96818: A.
Checked records flag no major concern; missing data is unknown.
Honolulu, HI (96818): PFAS Detected in Mapped Water Systems - 100/100
EPA data for Hnl-windward-pearl Harbor
EPA records for the water systems mapped to 96818 in Honolulu, HI contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No drinking-water violations in EPA records since 2021.
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.
- Flood 1 cumulative NFIP claim record. Claim evidence is historical, not current map coverage.
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Safety monitoring for 96818 in Honolulu produces 1 high-priority finding and no critical-tier conditions across all datasets reviewed.
Score Breakdown
Overall Home Safety Score: 100/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) HIGH
Your Water System
ZIP code 96818 in Honolulu, Hawaii is mapped to the water system Hnl-windward-pearl Harbor (EPA ID: HI0000331). This system provides water to approximately 631,389 people from groundwater sources.
Other Water Quality Reports in Hawaii
- 96701 (Aiea)
- 96703 (Anahola)
- 96704 (Captain Cook)
- 96705 (Eleele)
- 96706 (Ewa Beach)
- 96707 (Kapolei)
- 96708 (Haiku)
- 96709 (Kapolei)
- 96710 (Hakalau)
- 96712 (Haleiwa)
- 96713 (Hana)
- 96714 (Hanalei)
- 96715 (Hanamaulu)
- 96716 (Hanapepe)
- 96717 (Hauula)
- 96718 (Hawaii National Park)
- 96719 (Hawi)
- 96720 (Hilo)
- 96721 (Hilo)
- 96722 (Princeville)
Nearby Water Quality Reports
- 96849 (Honolulu) - 1 mi
- 96858 (Fort Shafter) - 2 mi
- 96701 (Aiea) - 3 mi
- 96820 (Honolulu) - 3 mi
- 96819 (Honolulu) - 3 mi
- 96860 (J B P H H) - 3 mi
- 96838 (Honolulu) - 3 mi
- 96861 (Camp H M Smith) - 3 mi
- 96853 (J B P H H) - 4 mi
- 96859 (Tripler Army Medical Center) - 4 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Hnl-windward-pearl Harbor (HI0000331) on EPA.gov.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 96818.
Detected compounds: PFHxS.
Highest measured level: 0.003 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (10) HIGH
Home & Infrastructure (6) MODERATE
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Honolulu
Based on local data for ZIP 96818, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Honolulu has 1 FEMA flood claim on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Gutter Installation & Repair
The median home in 96818 was built around 1986. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 96818 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 96818 (primary system: Hnl-windward-pearl Harbor), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 96818's water come from?
The recorded water source for Hnl-windward-pearl Harbor, a system mapped to ZIP code 96818, is Groundwater. This system serves approximately 631,389 people.
How does Honolulu water compare to the national average?
Honolulu's Home Safety Score ranks better than 93% of U.S. ZIP codes, and lower than 90% of ZIP codes within Hawaii.
How can I get my water tested in Honolulu?
If Hnl-windward-pearl Harbor supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 96818?
96818 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Honolulu County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 96818's water?
Yes, PFAS have been detected in samples from water systems mapped to 96818. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
What does the NFIP claim history show for ZIP 96818?
FEMA records contain 1 flood insurance claim filed in ZIP code 96818; the recorded rated-zone value (the most frequent one if there are several claims) is X, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Honolulu, HI (96818): PFAS Detected in Mapped Water Systems - 100/100. https://zipcheckup.com/report/96818/
@misc{zipcheckup-report-96818,
author = {{ZipCheckup}},
title = {{Honolulu, HI (96818): PFAS Detected in Mapped Water Systems - 100/100}},
year = {2026},
url = {https://zipcheckup.com/report/96818/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 96818
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 96849 | Honolulu, HI | 1.5 mi | N/A | 0 |
| 96858 | Fort Shafter, HI | 2.4 mi | N/A | 0 |
| 96701 | Aiea, HI | 2.6 mi | A | 0 |
| 96820 | Honolulu, HI | 3.1 mi | N/A | 0 |
| 96819 | Honolulu, HI | 3.3 mi | A | 0 |
| 96860 | J B P H H, HI | 3.3 mi | N/A | 0 |
| 96838 | Honolulu, HI | 3.4 mi | N/A | 0 |
| 96861 | Camp H M Smith, HI | 3.5 mi | N/A | 0 |
| 96853 | J B P H H, HI | 4.3 mi | N/A | 0 |
| 96859 | Tripler Army Medical Center, HI | 4.3 mi | N/A | 0 |
Nearby ZIP Code Reports
2026 Rankings for Your Area
Overall safety breakdown
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ZIP 96818 scores in the top tier nationally.