Honolulu Water Quality Report
18 cities ranked · Average grade: A · Hawaii
Avg Score
92.4
Cities Ranked
18
Health Violations
12
PFAS Detected
2
92.4
County avg score
18
Cities ranked
100%
A or B grade
0%
D or F grade
12
Health violations
2
PFAS detected
Grade Distribution
How Honolulu cities scored
A
16
89%
Excellent
B
2
11%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Hawaii average
▲ 0.8 pts above state average
City Map
Water quality across Honolulu
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Honolulu
County context
3
Superfund sites in Honolulu
512,764
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Honolulu
Industrial polluters nearby
Facilities reporting the most surface-water releases in Honolulu, 2023.
Total reported releases to surface water: 512,764 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
JOINT BASE PEARL HARBOR-HICKAM HAWAII JBPHH, HI96860 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 390,000 |
US MARINE CORPS BASE HAWAII KANEOHE BAY MCBH KANEOHE BAY, HI96863 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 122,728 |
HFFC AIRPORT FUEL FARM HONOLULU, HI96819 | Biphenyl | 30 |
HAWAIIAN ELECTRIC CO INC KAHE GENERATING STATION KAPOLEI, HI96707 | Lead And Lead Compounds | 4 |
HAWAIIAN ELECTRIC CO INC WAIAU GENERATING STATION PEARL CITY, HI96782 | Lead And Lead Compounds | 2 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Honolulu
Superfund sites nearby
Federally tracked hazardous-waste sites within Honolulu on the EPA National Priorities List.
- DEL MONTE CORP OAHU PLANTATION
- NAVAL COMPUTER AND TELECOMMUNICATIONS AREA MASTER STATION EASTERN PACIFIC
- PEARL HARBOR NAVAL COMPLEX
Source: EPA Superfund National Priorities List
Full Rankings
All 18 cities in Honolulu
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Downtown Honolulu | A+ | 99.3 | 3K | 9 | Health | |
| 2 | Sunset Beach | A+ | 99 | 5K | 0 | Zero violations | |
| 3 | Mililani Bws | A+ | 97.5 | 51K | 14 | ||
| 4 | Mokuleia | A+ | 96.1 | 2K | 8 | Health | |
| 5 | Waipio | A+ | 95.8 | 12K | 0 | Zero violations | |
| 6 | Pearl Harbor | A | 94.8 | 65K | 11 | Health Unresolved | |
| 7 | Wahiawa | A | 94 | 8K | 37 | Health Unresolved | |
| 8 | Moanalua | A | 94 | 6K | 9 | Health Unresolved | |
| 9 | Salt Lake | A | 93.5 | 6K | 6 | Health Unresolved | |
| 10 | Waipahu-Ewa-Waianae | A | 92.8 | 223K | 9 | Unresolved | |
| 11 | Laie | A | 92.6 | 6K | 2 | Health Unresolved | |
| 12 | Schofield Barracks | A | 91.8 | 45K | 15 | Health Unresolved | |
| 13 | Honolulu-Windward-Pearlharbor | A | 91.1 | 631K | 44 | Health Unresolved | |
| 14 | Kapalama | A- | 89.7 | 4K | 1 | Unresolved | |
| 15 | Kaneohe | A- | 88.3 | 16K | 7 | Health Unresolved | |
| 16 | Kahuku | A- | 85.9 | 3K | 1 | Unresolved | |
| 17 | Waialua-Haleiwa | B+ | 84.2 | 11K | 8 | Health Unresolved | |
| 18 | Honolulu | B+ | 83.3 | 23K | 8 | Health Unresolved |