Maui Water Quality Report
16 cities ranked · Average grade: A · Hawaii
Avg Score
90.9
Cities Ranked
16
Health Violations
12
PFAS Detected
0
90.9
County avg score
16
Cities ranked
100%
A or B grade
0%
D or F grade
12
Health violations
0
PFAS detected
Grade Distribution
How Maui cities scored
A
13
81%
Excellent
B
3
19%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Hawaii average
▼ 0.7 pts below state average
City Map
Water quality across Maui
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Maui
County context
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Maui
Industrial polluters nearby
Facilities reporting the most surface-water releases in Maui, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
MAUI ELECTRIC CO LTD KAHULUI GENERATING STATION KAHULUI, HI96732 | — | — |
MAUI ELECTRIC CO LTD PALAAU GENERATING STATION KAUNAKAKAI, HI96748 | — | — |
MAUI ELECTRIC CO LTD MIKI BASIN GENERATING STATION LANAI CITY, HI96763 | — | — |
MAUI ELECTRIC CO LTD MAALAEA GENERATING STATION KIHEI, HI96753 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 16 cities in Maui
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Kapalua (Dho) | A+ | 97.3 | 4K | 6 | Health Unresolved | |
| 2 | Mahanalua Nui | A+ | 97 | 606 | 0 | Zero violations | |
| 3 | Kawela | A+ | 97 | 553 | 1 | ||
| 4 | Kaunakakai | A+ | 96.1 | 4K | 12 | Health Unresolved | |
| 5 | Ualapue | A | 94.3 | 1K | 9 | Unresolved | |
| 6 | Keola Hana-Hotel Dho | A | 94.3 | 816 | 8 | Health Unresolved | |
| 7 | Hana | A | 93.7 | 1K | 13 | Health Unresolved | |
| 8 | Hoolehua | A | 93.2 | 2K | 13 | Unresolved | |
| 9 | Kualapuu | A | 92.3 | 500 | 22 | Health Unresolved | |
| 10 | Kaanapali (Dho) | A | 91.7 | 8K | 7 | Health Unresolved | |
| 11 | Lanai | A | 91.5 | 3K | 46 | Health Unresolved | |
| 12 | Wailuku | A | 91.4 | 75K | 19 | Health Unresolved | |
| 13 | Maunaloa, Molokai | A | 90.1 | 1K | 41 | Health Unresolved | |
| 14 | Makawao | B+ | 83 | 31K | 101 | Health Unresolved | |
| 15 | Lahaina | B | 77.1 | 20K | 146 | Health Unresolved | |
| 16 | Kula | B- | 74.5 | 12K | 139 | Health Unresolved |