Hawaii Water Quality
119 water systems serving 1,507,224 people. 158 total violations on record.
Safety Grade Distribution
A
107
90%
B
9
8%
C
3
3%
D
0
0%
F
0
0%
119
Water Systems
1,507,224
Population Served
158
Total Violations
28
Health-Based
Most Contaminated Systems
MARINE CORPS BASE HAWAII
16,300 served5 violations5 recent
C
SOUTH KOHALA
9,612 served2 violations2 recent
B
KIPU
80 served2 violations2 recent
B
NORTH KONA
29,581 served1 violations1 recent
B
KEOPU WATER ASSOCIATION
250 served1 violations1 recent
C
KUALAPUU
500 served2 violations1 recent
B
MAUNALOA-KALUAKOI
1,000 served3 violations1 recent
B
LANAI CITY
3,200 served43 violations1 recent
B
KALAUPAPA NHP
110 served2 violations1 recent
B
ALIAMANU
6,406 served1 violations1 recent
B
Cleanest Water Systems
HNL-WINDWARD-PEARL HARBOR
631,389 served0 violations
A
WAIPAHU-EWA-WAIANAE
217,479 served0 violations
A
WAILUKU
74,511 served0 violations
A
MILILANI
50,573 served0 violations
A
HILO
39,477 served1 violations
A
SCHOFIELD BARRACKS
37,920 served1 violations
A
LIHUE-KAPAA
34,854 served4 violations
A
MAKAWAO
29,868 served1 violations
A
WAHIAWA
23,348 served0 violations
A
LAHAINA
20,065 served4 violations
A
Largest Water Systems in Hawaii
| Water System | Grade | Population | Violations |
|---|---|---|---|
| HNL-WINDWARD-PEARL HARBOR | A | 631,389 | 0 |
| WAIPAHU-EWA-WAIANAE | A | 217,479 | 0 |
| WAILUKU | A | 74,511 | 0 |
| JOINT BASE PEARL HARBOR-HICKAM | B | 65,230 | 3 |
| MILILANI | A | 50,573 | 0 |
| HILO | A | 39,477 | 1 |
| SCHOFIELD BARRACKS | A | 37,920 | 1 |
| LIHUE-KAPAA | A | 34,854 | 4 |
| MAKAWAO | A | 29,868 | 1 |
| NORTH KONA | B | 29,581 | 1 |
| WAHIAWA | A | 23,348 | 0 |
| LAHAINA | A | 20,065 | 4 |
| MARINE CORPS BASE HAWAII | C | 16,300 | 5 |
| KALAHEO-KOLOA | A | 12,660 | 2 |
| WAIKOLOA | A | 12,100 | 1 |
| WAIPIO HEIGHTS | A | 11,516 | 0 |
| WAIALUA-HALEIWA | A | 9,996 | 0 |
| SOUTH KOHALA | B | 9,612 | 2 |
| KAANAPALI | A | 8,000 | 2 |
| UPPER KULA | A | 7,686 | 0 |
Contaminants in Hawaii
Cities in Hawaii
HONOLULU(15)WAILUKU(18)HILO(24)JBPPH(4)LIHUE(10)SCHOFIELD BARRACKS(4)WAIKOLOA(4)KANEOHE BAY(1)PRINCEVILLE(1)LAIE(1)PAHOA(2)HAWAII NATIONAL PARK(1)KAPALUA(1)LANAI CITY(1)KAUNAKAKAI(2)KAILUA-KONA(1)MAUNALOA(3)KAUMAKANI(1)MAKAWAO(1)KAMUELA(3)HANA(2)KAHULUI(3)KUNIA(1)KAILUA KONA(1)PEARL CITY(1)WAHIAWA(1)KALAHEO(1)HOLUALOA(1)KOLOA(1)KALAUPAPA(1)BEVERLY HILLS(1)ANAHOLA(1)PUUNENE(1)PAHALA(1)KAHUKU(1)AIEA(1)PUKALANI(1)