Maui Department of Water Supply Services, Programs, Phone Numbers and Customer Help
If you need Maui County water billing help, emergency leak reporting, conservation programs, water shortage information, water quality contacts, account usage tools or DWS office details, this guide gives the correct official phone numbers and user-friendly steps in one place.
County of Maui Department of Water Supply, often called Maui DWS, manages county water service, customer billing, water conservation, water shortage updates, water quality support, engineering resources and the 24/7 water service helpline.
☎️ Fastest route for common Maui DWS needs
Billing/account help: Call 808-270-7730 for water bill, account and customer service questions.
Emergency water issue: Call 808-270-7633 for broken mains, leaks, low pressure or water quality concerns.
Programs: Use official DWS pages for conservation, water source, water shortage declarations, watershed protection, forms and engineering resources.
Maui County Water Department Services Quick Facts
The County of Maui DWS contact page lists Customer Service/Billing at 808-270-7730, DWS Administration at 808-270-7816, DWS Laboratory at 808-270-7550, and the 24-hour emergency hotline at 808-270-7633.
DWS Customer Service is listed at 1888 Wili Pa Loop, Wailuku, with weekday hours from 8:00 AM to 4:00 PM. The main DWS administration office is listed at 200 S. High Street, Kalana O Maui Building, 5th Floor, Wailuku, HI 96793.
What This Maui DWS Services Guide Covers
County of Maui Water Department Phone Numbers
Use the right Maui DWS number based on the issue. Billing and account questions should go to Customer Service/Billing. Broken mains, leaks, low pressure and water quality concerns should go to the 24/7 Water Service Helpline.
| Need | Official phone | Use it for |
|---|---|---|
| Customer Service / Billing | 808-270-7730 | Water bill, account, usage, billing and customer service questions. |
| 24/7 Water Service Helpline | 808-270-7633 | Broken mains, leaks, low pressure and water quality concerns. |
| DWS Administration | 808-270-7816 | Department administration and general DWS office routing. |
| DWS Laboratory | 808-270-7550 | Laboratory and water testing-related routing. |
| All other DWS inquiries | 808-270-8046 | General Department of Water Supply inquiry routing. |
Maui DWS Customer Service and Billing Help
For billing, customer service and water account questions, call 808-270-7730. Official FAQ guidance also says customers can visit the DWS Customer Service office at 1888 Wili Pa Loop in Wailuku.
Customer Service is listed as open from 8:00 AM to 4:00 PM on weekdays, and closed on weekends and holidays. For faster help, keep your account number, service address and payment details ready before calling.
Call Customer Service/Billing
Call 808-270-7730 for water bill, account, usage and payment questions.
Prepare your account details
Have your account number, service address, customer name and latest bill open while calling.
Visit only when needed
If in-person help is needed, visit 1888 Wili Pa Loop, Wailuku during listed weekday customer service hours.
Maui County 24/7 Water Service Helpline
The official 24/7 Water Service Helpline page says to call 808-270-7633 to report broken mains, leaks, low pressure or water quality concerns.
Urgent water issue
Broken main, major leak, sudden low pressure or water quality concern.
808-270-7633Safety first
Stay away from unstable ground, floodwater, traffic and electrical hazards.
24/7 helplineIdentify the issue
Note whether the issue is a leak, broken main, low pressure, no water, water quality concern or visible water flowing outside.
Call the 24/7 helpline
Call 808-270-7633 for urgent water service help.
Give exact location details
Provide the address, nearest cross street, visible problem, when it started and a callback number.
Maui Department of Water Supply Services and Programs
The Maui DWS website gives quick access to several useful service areas, including Pay Your Water Bill, View Account and Usage, Conservation, Engineering, Access Forms, Water Shortage Declarations, 24/7 Water Service Helpline, Your Water Source, Rules & Regulations, Watershed Protection and the Board of Water Supply.
| Program / service | Best for | User action |
|---|---|---|
| Pay Your Water Bill | Online, phone or automatic bill payment guidance | Use official DWS payment pages only. |
| View Account and Usage | Checking usage, account details and water consumption patterns | Use your account number and official login tools. |
| Conservation | Reducing use, shortage response and saving water | Review DWS conservation tools and tips. |
| Engineering | Water service infrastructure, development, and technical review | Use official engineering contacts and forms. |
| Water Shortage Declarations | Understanding restrictions or shortage stages | Check official shortage pages before irrigating heavily. |
Maui Water Conservation Programs and Shortage Guidance
Water conservation is especially important in Maui because water availability can vary by region, elevation, rainfall and system capacity. DWS conservation resources help households, businesses and landscapes reduce unnecessary water use.
Open official conservation resources
Start from the Maui Department of Water Supply page and use the Conservation quick access area.
Check shortage declarations
Before heavy irrigation or landscaping use, check official Water Shortage Declarations links from DWS.
Estimate your water use
Use official water-use tools from DWS to understand whether irrigation, leaks, fixtures or household habits are driving high usage.
How to Pay a Maui County Water Bill
The Maui Department of Water Supply provides official bill payment guidance through its Pay Your Water Bill resources. DWS also lists online payment and pay-by-phone options from the department page.
The official DWS page lists Pay by Phone: 833-312-0151 and an online payment option. Customers should have their water account details ready before paying.
Start from official DWS payment resources
Open the official Pay Your Water Bill page.
Use online or phone payment
Use the official online payment route or call 833-312-0151 for pay-by-phone.
Save confirmation
Keep the payment confirmation, account number, payment date and amount until it appears on your account.
View Maui Water Account and Usage Information
DWS provides official account and usage access so customers can review water use, billing activity and account details. This is useful before calling about high usage, leaks, irrigation or payment questions.
Find your account number
Use your water bill to identify the account number before logging in or using payment tools.
Review usage trends
Compare current usage against previous months, the same season last year and known irrigation or household changes.
Call if usage looks wrong
Call 808-270-7730 if you need billing help or account explanation after checking usage.
Maui Water Quality, Laboratory and Safe Drinking Water Contacts
The DWS contact page lists DWS Laboratory at 808-270-7550. For urgent water quality concerns, the official 24/7 Water Service Helpline says to call 808-270-7633.
The DWS contact page also lists additional drinking water contacts, including the Hawaii State Department of Health Safe Drinking Water Branch and the EPA Safe Drinking Water Hotline for broader drinking water guidance.
Describe the concern clearly
Say whether the concern is taste, odor, discoloration, sediment, pressure, suspected contamination or report access.
Use the right number
For DWS Laboratory routing, call 808-270-7550. For urgent water quality concerns, call 808-270-7633.
Keep sample details ready
Note the address, fixture, time noticed, whether neighbors are affected, and whether the issue appears in hot water, cold water or both.
Maui DWS Forms, Engineering, Rules and Water Source Information
The Maui DWS homepage provides quick access to Access Forms, Engineering, Rules & Regulations, Your Water Source, Watershed Protection, Claims and the Board of Water Supply. These resources are useful for contractors, property owners, developers and residents with non-billing questions.
Use forms for written requests
Start from the DWS homepage and choose Access Forms if your issue requires an application or formal submission.
Use Engineering for technical review
Engineering resources may be relevant for development, meter, infrastructure, service, or construction-related questions.
Review rules before major work
Check Rules & Regulations and water source information before planning service changes, irrigation-heavy use or development work.
Maui Water Shortage Declarations and Service Notices
Maui DWS publishes water shortage declarations and water service notices online. These notices can affect irrigation, outdoor water use, conservation rules and local service expectations.
Check latest DWS notifications
Open the official DWS website and review the latest water supply news and notifications.
Check shortage status by area
Use official water shortage declaration resources before assuming rules are the same for all parts of Maui County.
Follow conservation instructions
Adjust irrigation, outdoor washing and high-use activities based on the current DWS notice or shortage declaration.
Maui DWS Office Address, Customer Service Location and Hours
The DWS main office is listed at 200 S. High Street, Kalana O Maui Building, 5th Floor, Wailuku, HI 96793, with DWS Administration phone 808-270-7816.
For customer service and billing, official FAQ guidance points customers to 1888 Wili Pa Loop in Wailuku, with Customer Service open from 8:00 AM to 4:00 PM on weekdays and closed on weekends and holidays.
Main DWS Office
Department administration and main office routing.
200 S. High StreetCustomer Service
Billing and customer service location.
1888 Wili Pa LoopMaui DWS Customer Service Map and Visit Guidance
Use the map below for the DWS Customer Service location at 1888 Wili Pa Loop, Wailuku. For urgent water service issues, call the 24/7 helpline first instead of visiting.
Maui DWS Customer Service – Wili Pa Loop
Use this map for customer service location reference before visiting.
Official Maui County Water Department Links and Resources
Use these official County of Maui resources for billing, emergency water service, conservation, water source, engineering, forms and DWS program information.
DWS Homepage
Main Department of Water Supply page for quick access to services and programs.
Open DWS HomepageContact Information
Official DWS phone numbers for billing, lab, administration and emergency hotline.
Open Contact Page24/7 Water Helpline
Report broken mains, leaks, low pressure and water quality concerns.
Open HelplinePay Water Bill
Official bill payment guidance, automatic bill payment and payment options.
Pay Water BillFiscal / Customer Service
Customer service and billing support information.
Open Customer ServiceAutomatic Bill Payment
Automatic Bill Payment setup information from Maui DWS.
Open ABP InfoDWS Programs
Conservation, water source, engineering, forms and shortage declaration links.
Open ProgramsBoard of Water Supply
Board information, meeting schedules and appeal resources.
Open Board PageCounty Website
Main County of Maui website for broader county services and updates.
Open Maui CountyMaui County Water Department Services, Programs and Phone FAQs
What is the Maui County Water Department customer service phone number?
County of Maui Department of Water Supply Customer Service/Billing phone number is 808-270-7730.
What is the Maui County DWS 24-hour emergency hotline?
Call 808-270-7633 for the 24/7 Water Service Helpline to report broken mains, leaks, low pressure or water quality concerns.
Where is Maui DWS Customer Service located?
Customer Service is listed at 1888 Wili Pa Loop, Wailuku.
What are Maui DWS Customer Service hours?
Customer Service is listed as open from 8:00 AM to 4:00 PM on weekdays and closed on weekends and holidays.
What is the Maui DWS administration phone number?
DWS Administration is listed at 808-270-7816.
How do I pay my Maui water bill by phone?
The DWS department page lists 833-312-0151 for pay-by-phone. Use official Maui County payment resources and keep your account number ready.
What Maui DWS programs are available online?
DWS quick access includes Pay Your Water Bill, View Account and Usage, Conservation, Engineering, Access Forms, Water Shortage Declarations, Your Water Source, Rules & Regulations, Watershed Protection and Board of Water Supply.
Who do I call for Maui water quality concerns?
For urgent water quality concerns, call the 24/7 helpline at 808-270-7633. The DWS Laboratory is listed at 808-270-7550.
Where is the Maui DWS main office?
The main office is listed at 200 S. High Street, Kalana O Maui Building, 5th Floor, Wailuku, HI 96793.
How do I check Maui water shortage declarations?
Use the official Maui DWS website and Water Shortage Declarations quick access area to review current shortage status and related conservation guidance.
Is Maui County DWS the same as Hawaii County DWS?
No. Maui County DWS serves Maui County. Hawaii County DWS serves the Island of Hawaiʻi and has different phone numbers and offices.
What should I prepare before calling Maui DWS?
Prepare your account number, service address, issue type, latest bill, payment confirmation if relevant, when the issue started and a callback number.
Best Way to Reach Maui County Water Help in 2026
For Maui DWS billing and account questions, call 808-270-7730. For broken mains, leaks, low pressure or water quality concerns, call the 24/7 Water Service Helpline at 808-270-7633. For administration, call 808-270-7816.
For online services, start from the official County of Maui DWS website. Use official resources for water bill payment, account usage, conservation, engineering, forms, water shortage declarations, water source information and Board of Water Supply updates.
Editorial note: This guide is informational and helps Maui County water customers find official Department of Water Supply contacts and programs faster. Phone numbers, hours, program details, emergency guidance, shortage rules and payment options can change, so always confirm final instructions directly on official County of Maui pages before taking action.