County · Hawaii

Hawaii County, Hawaii: drinking water records

Name: Drinking water records for Hawaii County, Hawaii
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 37 community water systems across 28 ZIP codes in Hawaii County, then find water-testing resources and available recent monitoring-station readings.

In focus37Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 11 of the 37 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 37 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	Health-based violations	Lead, 9 in 10 homes at or below
Hilo HI0000101	39,477	300	0	0 ppbbelow the action level
North Kona HI0000131	29,581	660	0	0 ppbbelow the action level
Waikoloa HI0000135	12,100	120	0	0 ppbbelow the action level
South Kohala HI0000130	9,612	120	0	0 ppbbelow the action level
South Kona HI0000132	6,512	240	0	0 ppbbelow the action level
Olaa-Mountain View HI0000112	6,467	120	0	0 ppbbelow the action level
North Kohala HI0000129	4,933	120	0	0 ppbbelow the action level
Haina HI0000161	4,563	180	0	0 ppbbelow the action level
Hawaii Volcanoes Nat.Park HI0000146	4,201	60	0	9.0 ppbbelow the action level
Hawaiian Beaches HI0000117	3,546	60	0	0 ppbbelow the action level
Kohala Ranch Water Co. HI0000151	850	60	0	10.8 ppbbelow the action level
Keopu Water Association HI0000168	250	0	1	0 ppbbelow the action level
Waiohinu-Naalehu HI0000108	2,948	0	0	0 ppbbelow the action level
Papaikou HI0000107	2,203	0	0	0 ppbbelow the action level
Kaupulehu HI0000163	1,945	0	0	0 ppbbelow the action level
Lalamilo HI0000160	1,895	0	0	0 ppbbelow the action level
Pahoa HI0000111	1,885	0	0	0 ppbbelow the action level
Pepeekeo HI0000106	1,450	0	0	0 ppbbelow the action level
Hawaiian Shores HI0000156	1,360	0	0	0 ppbbelow the action level
Pahala HI0000109	1,226	0	0	0 ppbbelow the action level
Laupahoehoe-Kapehu HI0000102	1,169	0	0	0 ppbbelow the action level
Hawaiian Ocean View Estates HI0000169	1,000	0	0	0 ppbbelow the action level
Paauilo HI0000134	716	0	0	0 ppbbelow the action level
Honomu HI0000105	645	0	0	0 ppbbelow the action level
Kukuihaele HI0000133	483	0	0	0 ppbbelow the action level
Napuu Water INC. HI0000150	468	0	0	0 ppbbelow the action level
Hakalau-Wailea HI0000154	402	0	0	0 ppbbelow the action level
Kalapana HI0000110	275	0	0	0 ppbbelow the action level
Ookala (Dws) HI0000104	264	0	0	0 ppbbelow the action level
Kona Water Service Company HI0000165	260	0	0	0 ppbbelow the action level
Niulii HI0000139	254	0	0	0 ppbbelow the action level
Punalu'U HI0000114	200	0	0	0 ppbbelow the action level
Kawaihae Unit #1 HI0000164	193	0	0	0 ppbbelow the action level
Ninole HI0000103	151	0	0	0 ppbbelow the action level
Waiki'I Ranch HI0000162	102	0	0	0 ppbbelow the action level
Wood Valley HI0000166	75	0	0	0 ppbbelow the action level
Pepeekeo Water Association HI0000167	60	0	0	0 ppbbelow the action level

USGS · Monitoring stations

The water, more recently.

Available station readings in Hawaii County, Hawaii. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Hawaii County

28ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Discovery Harbour
Hawaiian Acres
Hawaiian Beaches
Hawaiian Ocean View
Hawaiian Paradise Park
Hawi
Hilo
Holualoa
Honaunau-Napoopoo
Honomu
Kaiminani
Kapaau
Kealakekua
Kukuihaele
Laupahoehoe
Mountain View
Paauilo
Pahala
Papaikou
Pepeekeo
Volcano
Waikoloa Village
Waimea

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

96704Honaunau-Napoopoo
96710
96719Hawi
96720Hilo
96725Holualoa
96726Honaunau-Napoopoo
96727Kukuihaele
96728Honomu
96737Hawaiian Ocean View
96738Waikoloa Village
96740Kaiminani
96743Waimea
96749Hawaiian Paradise Park
96750Kealakekua
96755Kapaau
96760Hawaiian Acres
96764Laupahoehoe
96771Mountain View
96772Discovery Harbour
96773Laupahoehoe
96774
96776Paauilo
96777Pahala
96778Hawaiian Beaches
96780Laupahoehoe
96781Papaikou
96783Pepeekeo
96785Volcano

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter2 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Hawaii County

All Hawaii counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.