Water Hardness in Hawaii
Average: 45 PPMSoft76 cities119 water systems
Top 10 Hardest Water Cities
| # | City | Hardness |
|---|---|---|
| 1 | Kalaupapa | Very Hard (448 PPM) |
| 2 | Waikoloa | Moderately Hard (150 PPM) |
| 3 | Aiea | Slightly Hard (70 PPM) |
| 4 | Ewa Beach | Slightly Hard (70 PPM) |
| 5 | Haleiwa | Slightly Hard (70 PPM) |
| 6 | Hauula | Slightly Hard (70 PPM) |
| 7 | Honolulu | Slightly Hard (70 PPM) |
| 8 | Kaaawa | Slightly Hard (70 PPM) |
| 9 | Kahuku | Slightly Hard (70 PPM) |
| 10 | Kailua | Slightly Hard (70 PPM) |
Top 10 Softest Water Cities
| # | City | Hardness |
|---|---|---|
| 1 | Captain Cook | Soft (15 PPM) |
| 2 | Hakalau | Soft (15 PPM) |
| 3 | Hawi | Soft (15 PPM) |
| 4 | Hilo | Soft (15 PPM) |
| 5 | Honokaa | Soft (15 PPM) |
| 6 | Kapaau | Soft (15 PPM) |
| 7 | Keaau | Soft (15 PPM) |
| 8 | Kealakekua | Soft (15 PPM) |
| 9 | Kurtistown | Soft (15 PPM) |
| 10 | Mountain View | Soft (15 PPM) |
All Cities in Hawaii
AieaSlightly HardAnaholaSoftCaptain CookSoftEleeleSoftEwa BeachSlightly HardHaikuSoftHakalauSoftHaleiwaSlightly HardHanaSoftHanaleiSoftHanapepeSoftHauulaSlightly HardHawiSoftHiloSoftHolualoaSoftHonokaaSoftHonoluluSlightly HardHonomuSoftHoolehuaSoftKaaawaSlightly HardKahukuSlightly HardKahuluiSoftKailuaSlightly HardKailua KonaSoftKalaheoSoftKalaupapaVery HardKamuelaSoftKaneoheSlightly HardKaneohe McasSlightly HardKapaaSoftKapaauSoftKapoleiSlightly HardKaumakaniSoftKaunakakaiSoftKeaauSoftKealakekuaSoftKealiaSoftKekahaSoftKiheiSoftKilaueaSoftKoloaSoftKualapuuSoftKulaSoftKuniaSlightly HardKurtistownSoftLahainaSoftLaieSlightly HardLanai CitySoftLaupahoehoeSoftLihueSoftMakawaoSoftMakaweliSoftMaunaloaSoftMililaniSlightly HardMountain ViewSoftNaalehuSoftNinoleSoftOokalaSoftPaauiloSoftPahalaSoftPahoaSoftPaiaSoftPapaaloaSoftPapaikouSoftPearl CitySlightly HardPepeekeoSoftPrincevilleSoftVolcanoSoftWahiawaSlightly HardWaialuaSlightly HardWaianaeSlightly HardWaikoloaModerately HardWailukuSoftWaimanaloSlightly HardWaimeaSoftWaipahuSlightly Hard