Honolulu Board of Water Supply - Waipahu-Ewa-Waianae Water System
Waipahu, Ewa, Kapolei, Nanakuli, and Waianae areas of west Oahu
Population reference
217,479 people (EPA SDWIS active CWS PWS HI0000335)
Billing detail
Limited public detail found
Official destination
Open provider website ↗Provider-specific findings
Billing and account research from public material
Provider-specific research notes are displayed separately from fields that contain only an unavailable-information marker. Read qualifiers in each note and verify current account terms with the provider.
- Rate structure
- Metered municipal water rate schedule with fixed and usage components. The official FY2024-FY2029 schedule includes rates effective July 1, 2026 and service-area classifications; the Waipahu-Ewa-Waianae system is owned by Honolulu BWS and serves west Oahu.
- Wastewater and sewer calculation
- BWS supplies drinking water; wastewater sewer charges are administered separately by the City and County of Honolulu Environmental Services. The reviewed BWS sources did not expose a universal sewer calculation for this water system.
Context, not a score
How documentation coverage compares
This profile
29%
overview fields with research notes
Hawaii
36%
records with any overview detail
National index
50%
records with any overview detail
Coverage measures what this directory documented. It does not measure service quality, affordability, or regulatory compliance.
Research record
Limited public detail found
2 of 7 fields in this section contain provider-specific public detail in dataset August 1, 2026.
Documented
29%
Details not confirmed in the reviewed public material
- Billing frequency
- Residential cost reference
- Meter reading
- New-account deposit
- Activation or transfer fee
“Not confirmed” means the directory did not identify a dependable public statement. It does not mean the provider has no policy or option.
Primary verification routes
- Honolulu Board of Water Supply - Waipahu-Ewa-Waianae Water System public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA SDWIS / ECHO lookup (HI0000335) ↗
Search the federal drinking-water database using public water system ID HI0000335.