Water Quality: Honolulu, HI
15 water systems • 961,760 people served
Some Concerns13
Total Violations
1
Health-Based Violations
15
Water Systems
961,760
Population Served
Water Quality Summary
Honolulu has 1 health-based violation on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: E. coli. In total, 13 violations are on record for 15 water systems serving 961,760 people.
Contaminants Found
E. coli
Water Systems Serving Honolulu
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| HNL-WINDWARD-PEARL HARBOR | HI0000331 | Groundwater | 631,389 | 0 |
| WAIPAHU-EWA-WAIANAE | HI0000335 | Groundwater | 217,479 | 0 |
| MILILANI | HI0000367 | Groundwater | 50,573 | 0 |
| WAHIAWA | HI0000333 | Groundwater | 23,348 | 0 |
| WAIPIO HEIGHTS | HI0000334 | Groundwater | 11,516 | 0 |
| WAIALUA-HALEIWA | HI0000332 | Groundwater | 9,996 | 0 |
| WAIALEE-SUNSET BEACH | HI0000366 | Groundwater | 4,916 | 0 |
| KAMEHAMEHA SCHOOLS | HI0000319 | Groundwater | 4,000 | 0 |
| THE QUEEN'S MEDICAL CENTER | HI0000312 | Groundwater | 3,440 | 6 |
| KAHUKU | HI0000365 | Groundwater | 2,730 | 1 |
| DILLINGHAM AIRFIELD | HI0000338 | Groundwater | 1,800 | 0 |
| WAIAHOLE | HI0000368 | Groundwater | 300 | 2 |
| PUNALU'U | HI0000114 | Groundwater | 200 | 1 |
| WOODLANDS AT NUUANU | HI0000372 | Groundwater | 48 | 0 |
| POAMOHO | HI0000371 | Groundwater | 25 | 3 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.