Water Quality in 96720 — Hilo, HI
EPA data for HILO
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 96720 in Hilo, Hawaii is served by HILO (EPA ID: HI0000101). This system provides water to approximately 39,477 people from groundwater sources.
There are 24 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| August 1, 2024 | Fecal Coliform | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Fecal Coliform | Microbiological | 2 | No |
| Stage 1 DBP Rule | Treatment Technique | 1 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| HILO | HI0000101 | 39,477 | Groundwater |
| NORTH KONA | HI0000131 | 29,581 | Groundwater |
| SOUTH KOHALA | HI0000130 | 9,612 | Surface water |
| SOUTH KONA | HI0000132 | 6,512 | Groundwater |
| OLAA-MOUNTAIN VIEW | HI0000112 | 6,467 | Groundwater |
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Hawaii
- 96701 (Aiea)
- 96703 (Anahola)
- 96708 (Haiku)
- 96713 (Hana)
- 96714 (Hanalei)
- 96718 (Hawaii National Park)
- 96722 (Princeville)
- 96725 (Holualoa) — 1 violation
- 96728 (Honomu)
- 96729 (Hoolehua)
- 96731 (Kahuku)
- 96732 (Kahului)
- 96738 (Waikoloa)
- 96740 (Kailua Kona)
- 96741 (Kalaheo)
- 96742 (Kalaupapa)
- 96743 (Kamuela)
- 96744 (Kaneohe) — 5 violations
- 96747 (Kaumakani)
- 96748 (Kaunakakai)
Nearby Water Quality Reports
- 96728 (Honomu) — 12 mi
- 96718 (Hawaii National Park) — 24 mi
- 96743 (Kamuela) — 45 mi
- 96738 (Waikoloa) — 51 mi
- 96725 (Holualoa) — 54 mi — 1 violation
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for HILO (HI0000101) on EPA.gov.
Frequently Asked Questions
Is the tap water in 96720 safe to drink?
Based on EPA records, the water system serving ZIP code 96720 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 96720’s water come from?
The primary water source for this area is groundwater. HILO serves approximately 39,477 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 96720 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 96720. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 96720?
Radon zone data is not available for ZIP code 96720. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.