Hawaii Water Quality Report
21 cities ranked · Average grade: A · Hawaii
Avg Score
90.4
Cities Ranked
21
Health Violations
8
PFAS Detected
0
90.4
County avg score
21
Cities ranked
100%
A or B grade
0%
D or F grade
8
Health violations
0
PFAS detected
Grade Distribution
How Hawaii cities scored
A
17
81%
Excellent
B
4
19%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Hawaii average
▼ 1.2 pts below state average
City Map
Water quality across Hawaii
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Hawaii
County context
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Hawaii
Industrial polluters nearby
Facilities reporting the most surface-water releases in Hawaii, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
HILL GENERATING STATION HILO, HI96720 | — | — |
U.S. ARMY POHAKULOA TRAINING AREA - RANGE FACILITY HILO, HI96720 | — | — |
HAMAKUA ENERGY PLANT HONOKAA, HI96727 | — | — |
ALOHA PETROLEUM LLC-HILO WEST TERMINAL HILO, HI96720 | — | — |
HAWAII ELECTRIC LIGHT CO INC KEAHOLE GENERATING STATION KAILUA KONA, HI96740 | — | — |
+ 2 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 21 cities in Hawaii
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Olaa-Mt.View | A+ | 100 | 6K | 0 | Zero violations | |
| 2 | Haina | A+ | 100 | 5K | 0 | Zero violations | |
| 3 | Waiohinu-Naalehu | A+ | 98.5 | 3K | 0 | Zero violations | |
| 4 | Lalamilo | A+ | 97 | 2K | 1 | ||
| 5 | Paauilo | A+ | 97 | 716 | 0 | Zero violations | |
| 6 | Waikoloa (Dho) | A+ | 96.7 | 12K | 6 | Health Unresolved | |
| 7 | Hawaiian Shores Dho | A | 93.2 | 5K | 4 | Health Unresolved | |
| 8 | Honomu | A | 93 | 645 | 0 | Zero violations | |
| 9 | Hilo | A | 91.7 | 39K | 49 | Health Unresolved | |
| 10 | Hvnp (Dho) | A | 90.5 | 4K | 4 | Health Unresolved | |
| 11 | South Kona | A- | 89.7 | 7K | 1 | Unresolved | |
| 12 | Papaikou | A- | 89.7 | 2K | 2 | Unresolved | |
| 13 | Pahoa | A- | 89.7 | 2K | 2 | Unresolved | |
| 14 | North Kona | A- | 88.2 | 30K | 2 | Unresolved | |
| 15 | Pahala | A- | 86.7 | 1K | 1 | Health Unresolved | |
| 16 | Laupahoehoe | A- | 86.7 | 1K | 1 | Unresolved | |
| 17 | North Kohala | A- | 85.7 | 5K | 1 | Unresolved | |
| 18 | Kohala Joint Venture | B+ | 82.7 | 850 | 1 | Unresolved | |
| 19 | Pepeekeo | B+ | 82.4 | 2K | 2 | Health Unresolved | |
| 20 | South Kohala | B+ | 80.4 | 10K | 97 | Health Unresolved | |
| 21 | Kona | B | 79.8 | 3K | 17 | Health Unresolved |