County of Maui Department of Water Supply
Wailuku and County of Maui Department of Water Supply service areas
Population reference
74,511 people served according to the EPA queue; the County of Maui Department of Water Supply serves Central Maui and other county water systems.
Billing detail
Partial 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.
- Billing frequency
- Monthly. Maui DWS changed from bi-monthly to monthly billing so customers receive a monthly statement and can detect high-use leaks sooner; ABP deductions occur 20 days after the bill is generated.
- Rate structure
- Increasing block tiers plus a monthly meter-size service charge. For FY2027, effective July 1, 2026, single-family water is $2.13/1,000 gallons for 0-5,000 gallons, $4.98 for 5,001-15,000, $9.59 for 15,001-35,000, $16.50 for 35,001-50,000, and $19.80 over 50,000, with shortage-stage surcharges possible. A 5/8-inch meter has a $30.25 monthly service charge.
- Residential cost reference
- For a 5/8-inch single-family meter using 6,000 gallons in FY2027, the water component is approximately $35.23: $30.25 monthly service charge plus $10.65 for the first 5,000 gallons and $4.98 for the next 1,000. Where County residential sewer applies, the published sewer charge is $61 base plus $4.75 per 1,000 gallons through a 9,000-gallon ceiling, making a 6,000-gallon combined illustrative total about $130.23/month; sewer billing is administered by the Wastewater Reclamation Division and may vary by area.
- Wastewater and sewer calculation
- County residential sewer user fees consist of a monthly base charge and a water-usage component with a usage ceiling. The published single-family schedule is $61.00 per month covering the first 9,000 gallons, plus $4.75 per 1,000 gallons; multi-family uses the same $61 base with a 6,000-gallon included threshold. The sewer department recognizes that irrigation and other outdoor use may not enter the sewer, and separate irrigation meters can affect sewer charging; DWS collects the sewer charge on the combined bill.
- Meter reading
- DWS bills monthly based on water passing through the customer's meter and provides account/usage information through its billing system. The reviewed official pages do not identify an AMI/AMR vendor, remote-read interval, or universal physical-reader schedule.
Context, not a score
How documentation coverage compares
This profile
71%
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
Partial public detail found
5 of 7 fields in this section contain provider-specific public detail in dataset August 1, 2026.
Documented
71%
Details not confirmed in the reviewed public material
- 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
- County of Maui Department of Water Supply public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA Safe Drinking Water Information System ↗
Federal background on public water-system records and their limitations.