Lead pipes in Hawaii

Hawaii's 118 community water systems reported 0 lead and 490 galvanized-requiring-replacement service lines, plus 34,235 of unknown material. That ranks #50 among states for confirmed lead lines.

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0Lead

490Galvanized, replace

34,235Unknown

11Systems with lead

• Lead 0%
• Galvanized (replace) 0.1%
• Unknown 10%
• Non-lead 90%

0.1% of the service lines Hawaii utilities reported are lead or galvanized requiring replacement, well below the national share of 3.1%. 10% are still unidentified (national: 21%). The largest counts are in Wailuku (293), Joint Base Pearl Harbor-Hickam (87), Hawaiian Beaches (51). 1 systems haven't reported counts yet.

Since 2025 Q1, reported lead and galvanized lines in Hawaii went from 490 to 490 (down 0). See which systems made the most progress.

Systems with confirmed lead lines (11)

Water system	Lead	Galv.	Unknown	% lead	People
WailukuWailuku	0	293	13,359	1.3%	74,511
Joint Base Pearl Harbor-HickamPearl Harbor	0	87	0	0.4%	65,230
Hawaiian BeachesHawaiian Shores Dho	0	51	39	3.5%	3,546
Pacific Missile Range FacilityPmrf Housing (Dho)	0	16	26	3.3%	1,200
KaunakakaiKaunakakai	0	15	522	1.1%	3,702
Nctams EastpacWahiawa	0	15	3	5.4%	6,470
Haleakala National ParkKula	0	6	0	27%	1,200
Waialua Sugar Pump 2Waialua-Haleiwa	0	3	109	2.5%	400
Hawaiian ShoresHawaiian Shores Dho	0	2	455	0.4%	1,360
OlowaluOlowalu	0	1	58	1.4%	100
Dillingham RanchWaialua-Haleiwa	0	1	55	1.5%	100

No confirmed lead, but unknown lines remain (36)

Water system	Lead	Galv.	Unknown	% lead	People
MakawaoMakawao	0	0	5,929	0%	29,868
LahainaLahaina	0	0	3,103	0%	20,065
Upper KulaKula	0	0	2,047	0%	7,686
WaikoloaWaikoloa (Dho)	0	0	1,408	0%	12,100
Lower KulaKula	0	0	1,331	0%	3,522
Schofield BarracksHonolulu County	0	0	997	0%	37,920
Kohala Ranch Water Co.Kohala Joint Venture	0	0	704	0%	850
KapaluaKapalua (Dho)	0	0	653	0%	4,200
HanaHana	0	0	478	0%	1,284
KaanapaliKaanapali (Dho)	0	0	439	0%	8,000
Maunaloa-KaluakoiMaunaloa	0	0	350	0%	1,000
UalapueUalapue	0	0	306	0%	1,119
Kona Water Service CompanyKona	0	0	252	0%	260
Barbers PointWaipahu-Ewa-Waianae	0	0	178	0%	5,256
Kawela PlantationKawela	0	0	157	0%	553
Fort ShafterHonolulu County	0	0	153	0%	7,067
Maui HighlandsKihei	0	0	153	0%	26
AliamanuSalt Lake	0	0	134	0%	6,406
Hana Water Systems - NorthKaeleku Ag Park Hana	0	0	110	0%	160
HoolehuaHoolehua	0	0	107	0%	2,400
Waiki'I RanchWaikii Ranch (Dho)	0	0	106	0%	102
KeanaeKeanae (Dws)	0	0	84	0%	270
Hana Water Systems - SouthKeola Hana-Hotel Dho	0	0	79	0%	816
KealiaKealia (Dho)	0	0	72	0%	260
Anahola Farm LotsAnahola Farm Lots (Dho)	0	0	71	0%	385
KalaeMakena	0	0	49	0%	360
NahikuNahiku	0	0	38	0%	107
Kula NaniKula	0	0	27	0%	80
Kahuku Air BaseKahuku Air Base	0	0	24	0%	75
Waiawa Correctional FacilityWaipahu	0	0	19	0%	444
HonokohauLahaina	0	0	12	0%	42
Kamehameha SchoolsKapalama	0	0	11	0%	4,000
KualapuuKualapuu	0	0	10	0%	500
Wood ValleyPahala	0	0	8	0%	75
Dillingham AirfieldMokuleia	0	0	7	0%	1,800
Tripler Army Medical CNTRMoanalua	0	0	3	0%	5,555

No lead or unknown lines reported (38)

Systems serving 1,000 or more people. Systems without counts on file are listed as 0.

Water system	Lead	Galv.	Unknown	% lead	People
Hnl-Windward-Pearl HarborHonolulu-Windward-Pearlharbor	0	0	0	0%	631,389
Waipahu-Ewa-WaianaeWaipahu-Ewa-Waianae	0	0	0	0%	217,479
MililaniMililani Bws	0	0	0	0%	50,573
HiloHilo	0	0	0	0%	39,477
Lihue-KapaaLihue-Kapaa	0	0	0	0%	34,854
North KonaNorth Kona	0	0	0	0%	29,581
WahiawaHonolulu County	0	0	0	0%	23,348
Marine Corps Base HawaiiKaneohe	0	0	0	0%	16,300
Kalaheo-KoloaKalaheo	0	0	0	0%	12,660
Waipio HeightsWaipio	0	0	0	0%	11,516
Waialua-HaleiwaWaialua-Haleiwa	0	0	0	0%	9,996
South KohalaSouth Kohala	0	0	0	0%	9,612
PrincevillePrinceville (Dho)	0	0	0	0%	6,911
South KonaSouth Kona	0	0	0	0%	6,512
Olaa-Mountain ViewOlaa-Mt.View	0	0	0	0%	6,467
Kekaha-WaimeaKekaha (Dow)	0	0	0	0%	5,998
Hanapepe-EleeleHanapepe-Eleele (Dow)	0	0	0	0%	5,592
Laie Water CompanyLaie	0	0	0	0%	5,577
North KohalaNorth Kohala	0	0	0	0%	4,933
Waialee-Sunset BeachSunset Beach	0	0	0	0%	4,916
HainaHaina	0	0	0	0%	4,563
Hawaii Volcanoes Nat.ParkHvnp (Dho)	0	0	0	0%	4,201
The Queen'S Medical CenterDowntown Honolulu	0	0	0	0%	3,440
KilaueaKilauea (Dow)	0	0	0	0%	3,420
Lanai CityLanai	0	0	0	0%	3,200
Waiohinu-NaalehuWaiohinu-Naalehu	0	0	0	0%	2,948
KahukuKahuku	0	0	0	0%	2,730
AnaholaAnahola	0	0	0	0%	2,473
PapaikouPapaikou	0	0	0	0%	2,203
KaupulehuKona	0	0	0	0%	1,945
LalamiloLalamilo	0	0	0	0%	1,895
PahoaPahoa	0	0	0	0%	1,885
PepeekeoPepeekeo	0	0	0	0%	1,450
Gay & RobinsonKaumakani	0	0	0	0%	1,271
PahalaPahala	0	0	0	0%	1,226
Laupahoehoe-KapehuLaupahoehoe	0	0	0	0%	1,169
Hawaiian Ocean View EstatesKona	0	0	0	0%	1,000
Hoku'Ula Water SystemMakawao	0	0	0	–	1,000

Lead pipes in Hawaii cities

• Urban Honoluluno lead reported

All Hawaii cities and towns · Lead pipes by county

Hawaii lead pipe questions

How many lead pipes are in Hawaii?

Hawaii's community water systems reported 0 lead service lines and 490 galvanized lines that must be replaced, for 490 in total. Another 34,235 lines are of unknown material.

Which Hawaii water systems have the most lead pipes?

Wailuku (293), Joint Base Pearl Harbor-Hickam (87), Hawaiian Beaches (51). Counts are lead plus galvanized-requiring-replacement lines.

What share of Hawaii service lines are lead?

0.1% of reported service lines in Hawaii are lead or galvanized requiring replacement, well below the national figure of 3.1%. 10% are still unknown, compared with 21% nationally.

How do I find out if my Hawaii home has a lead service line?

Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.

Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.