A83/100
Hawaii Tap Water Quality Rankings 2026
18 cities · 1,489,177 people served
Top Contaminant Concerns
Copper (90th percentile)
All Cities in Hawaii
| # | City | Score | Population | Violations |
|---|---|---|---|---|
| 1 | Honolulu | A (88) | 961,187 | 81 |
| 2 | Wailuku | D (39) | 141,757 | 349 |
| 3 | Hilo | A (84) | 113,921 | 149 |
| 4 | Jbpph | A (91) | 72,900 | 12 |
| 5 | Lihue | A (95) | 64,997 | 26 |
| 6 | Schofield Barracks | A (84) | 56,948 | 26 |
| 7 | Waikoloa | A (86) | 25,356 | 14 |
| 8 | Kaneohe Bay | A (90) | 16,300 | 6 |
| 9 | Princeville | A (99) | 6,911 | 1 |
| 10 | Laie | A (95) | 5,577 | 1 |
| 11 | Pahoa | A (91) | 4,906 | 3 |
| 12 | Hawaii National Park | A (90) | 4,201 | 3 |
| 13 | Kapalua | A (87) | 4,200 | 5 |
| 14 | Lanai City | C (51) | 3,200 | 45 |
| 15 | Kaunakakai | A (88) | 2,400 | 12 |
| 16 | Kailua-Kona | C (50) | 1,945 | 14 |
| 17 | Kaumakani | B (75) | 1,271 | 9 |
| 18 | Makawao | A (99) | 1,200 | 1 |