Kauaʻi Department of Water Services, Customer Programs, Phone Numbers and Emergency Help
If you need the Kauaʻi Water Department phone number, billing help, service start or transfer support, water outage reporting, conservation programs, low-flow fixtures, water quality reports, forms or office location, this guide gives you the official route for each task.
Kauaʻi Department of Water manages public drinking water service, customer accounts, billing, water service requests, water conservation, water quality reporting, forms and emergency response for Department-served water systems across Kauaʻi.
☎️ Billing, program, service issue or emergency?
General inquiries: Call 808-245-5400 or email dow@kauaiwater.org.
Billing / service account: Call 808-245-5442 or email billing@kauaiwater.org.
After-hours emergency: Call 808-241-1711 on nights, weekends and holidays.
Kauaʻi Water Department Services and Phone Quick Facts
The Department of Water lists its main office at 4398 Pua Loke Street, Līhuʻe, HI 96766. Hours of operation are Monday through Friday, 7:45 AM to 4:30 PM, and lobby hours are 8:00 AM to 4:00 PM.
For customers, the most important numbers are general inquiries at 808-245-5400, billing support at 808-245-5442, water service issues during business hours through the official service issue route, and after-hours emergency dispatch at 808-241-1711.
What This Kauaʻi Department of Water Guide Covers
Kauaʻi Department of Water Phone Numbers for Customers
Use the phone number that matches the task. General questions, billing questions, water quality questions and emergency calls go to different routes.
| Need | Official contact | Use it for |
|---|---|---|
| General inquiries | 808-245-5400 | General DOW questions, office routing and department contact. |
| Billing support | 808-245-5442 / billing@kauaiwater.org | Water bill, account, automatic bill payment, start or transfer service questions. |
| Water quality questions | 808-245-5400 option 3 | General water quality inquiries and report questions. |
| Service issue during business hours | 808-245-5444 or official outage route | Water trouble, service issue, leak, low/no water during business hours. |
| After-hours emergency | 808-241-1711 | Water emergencies on nights, weekends and holidays. |
Kauaʻi Water Department Services and Programs
The Department of Water provides more than billing. Customers may need service start/transfer, water conservation help, low-flow fixtures, water quality reports, water system information, service outage updates, forms and emergency preparedness information.
Water Conservation
Conservation tips and free low-flow fixture program information.
Open ConservationWater Quality
Water quality reports and drinking water quality information.
Open Water QualityWater Systems
Information about Kauaʻi Department of Water system boundaries and infrastructure.
Open Water SystemsKauaʻi Water Bill Pay, Billing Support and Automatic Bill Payment
For water bill questions, automatic bill payment or account billing help, contact billing support at 808-245-5442 or billing@kauaiwater.org.
Open the official payment page
Start from the official Pay Your Water Bill page.
Use official billing contact for account questions
Call 808-245-5442 or email billing@kauaiwater.org for bill, ABP or account questions.
Confirm payment posting before shutoff risk
If your account is late or close to service interruption, do not rely only on email. Call billing support and confirm payment timing.
Sign Up or Transfer Kauaʻi Water Service
The Department of Water provides an official sign-up and transfer service page. Use it when moving into a Department-served address, transferring service, closing a service account or asking account setup questions.
Open the official service page
Use the official Sign Up or Transfer Water Service page.
Prepare service details
Have the service address, start date, account holder name, contact phone, email, mailing address and billing details ready.
Call or email billing for help
Call 808-245-5442 or email billing@kauaiwater.org if you are not sure which form or step applies.
Kauaʻi Water Service Outages, Leaks and Emergency Contacts
For water emergencies on nights, weekends and holidays, call 808-241-1711. During business hours, official DOW pages list service issue and emergency routing through DOW phone support, including 808-245-5444 for service issues and 808-245-5400 option 1 on the service outages page.
After-hours emergency
Nights, weekends and holidays use emergency dispatch.
808-241-1711Business-hours issue
Use DOW business-hours service issue route.
808-245-5444 / option 1Identify the problem
Say whether it is no water, low pressure, visible leak, water main issue, broken meter area, outage notice or water quality concern.
Call the correct emergency route
For nights, weekends and holidays, call 808-241-1711. During business hours, use the DOW service issue contact route.
Give location and safety details
Provide the service address, nearest cross street, visible water flow, road hazard, property impact and callback number.
Kauaʻi Water Quality Reports and Drinking Water Questions
The Department of Water publishes water quality reports for its water systems. The water quality page says customers can download the full report for their area and call 808-245-5400 option 3 for general water quality inquiries.
Open the water quality page
Use the official Water Quality page.
Find your water system report
Choose the water quality report for the area or system that serves your property.
Call for water quality questions
For general inquiries about water quality, call 808-245-5400 and choose option 3.
Kauaʻi Department of Water Systems and Service Areas
The Department of Water’s water systems page explains that the Board of Water is responsible for independent water systems from Kekaha to Hāʻena. The systems include wells, tunnels, booster pumps, storage tanks and distribution pipelines.
Check official water system information
Open the official Water Systems page.
Confirm your property is in DOW service area
Some areas may have different water arrangements. Confirm your provider before using billing or service forms.
Use system details for water quality reports
Knowing your water system can help you locate the correct water quality report and service notices.
Kauaʻi Water Conservation Program and Free Low-Flow Fixtures
The Department of Water offers water conservation information and free low-flow fixtures to help customers conserve water and money. For fixture questions, the conservation page lists the Public Relations Specialist phone as 808-245-5461.
Open the conservation page
Use the official Water Conservation page.
Download or complete the fixture form
Follow the official instructions for requesting low-flow fixtures.
Call for fixture questions
For questions about fixtures, call 808-245-5461.
Kauaʻi Department of Water Applications and Forms
The Department of Water provides an official forms page. Many forms are interactive, allowing customers to complete them online, print and submit by mail, fax or in person according to the official instructions.
Open official forms
Use the official Applications and Forms page.
Choose the correct form
Select the form related to service, billing, conservation, automatic bill payment, account update or customer request.
Submit through official route
Follow each form’s instructions for mail, fax, email, in-person or other submission method.
Checklist Before Calling Kauaʻi Department of Water
Prepare the right details before calling. Billing staff need account information, while service issue staff need exact location and issue details.
| Check | What to prepare |
|---|---|
| Account number | Water account number from your bill or customer portal. |
| Service address | Full address, unit number, town/area and nearest cross street if needed. |
| Issue type | Billing, service start, transfer, no water, low pressure, leak, water quality, conservation or form help. |
| Proof or documents | Payment confirmation, bill copy, service form, water quality concern photo, repair receipt or move document. |
| Callback | Best phone number and email for follow-up. |
What to Say When Calling Kauaʻi Department of Water
A clear call helps the Department route your question faster. Use the script that matches the reason for your call.
| Situation | Example wording | Best route |
|---|---|---|
| General question | “I need help finding the correct Department of Water service for my issue.” | 808-245-5400 |
| Billing | “I have a billing question for account number…” | 808-245-5442 |
| Start / transfer service | “I need to start or transfer water service at this address.” | Sign-up page + billing support |
| After-hours emergency | “I am reporting a water emergency at this location.” | 808-241-1711 |
| Water quality | “I have a water quality question for my area/system.” | 808-245-5400 option 3 |
Kauaʻi Department of Water Office Map and Visit Guidance
The Department of Water office is located at 4398 Pua Loke Street, Līhuʻe, Hawaiʻi 96766. Lobby hours are listed as 8:00 AM to 4:00 PM, Monday through Friday.
Kauaʻi Department of Water
Use this map for office location reference. For urgent water emergencies, call the correct emergency number before visiting.
Official Kauaʻi Department of Water Links and Resources
Use these official resources for customer service, billing, water service, conservation, water quality, systems, forms, outages and County contact information.
Kauaʻi Department of Water Home
Main Department of Water website for customer service and program resources.
Open DOW WebsiteContact Us
Official address, phone numbers, hours and emergency contact information.
Open Contact PageSign Up / Transfer Service
Start, transfer or ask about water service account setup.
Open Service PageWater Conservation
Conservation tips and free low-flow fixture information.
Open ConservationWater Quality
Water quality reports and general water quality inquiry guidance.
Open Water QualityWater Systems
Water system map and infrastructure/service area information.
Open Water SystemsKauai Water Department Services, Programs and Phone FAQs
What is the Kauai Water Department phone number?
For general Kauaʻi Department of Water inquiries, call 808-245-5400.
Where is the Kauai Department of Water located?
The Department of Water is located at 4398 Pua Loke Street, Līhuʻe, HI 96766.
What are Kauai Department of Water office and lobby hours?
Hours of operation are Monday through Friday, 7:45 AM to 4:30 PM. Lobby hours are 8:00 AM to 4:00 PM.
Who do I call for Kauai water billing help?
For billing help, call 808-245-5442 or email billing@kauaiwater.org.
What number do I call for Kauai water emergencies after hours?
For water emergencies on nights, weekends and holidays, call 808-241-1711.
How do I report a water service issue during business hours?
The official service issue FAQ lists 808-245-5444 for service issues during business hours. The service outages page also lists 808-245-5400 option 1 for water emergencies during business hours. Start with the official route that matches your issue.
Does Kauai Department of Water offer water conservation programs?
Yes. The Department offers conservation resources and free low-flow fixtures. For fixture questions, call 808-245-5461.
Where can I find Kauai water quality reports?
Use the official Water Quality page to find water quality reports for your system.
How do I start or transfer Kauai water service?
Open the official Sign Up or Transfer Water Service page, or contact billing support at 808-245-5442 or billing@kauaiwater.org.
Where can I find Kauai Department of Water forms?
Use the official Applications and Forms page for Department of Water forms.
Is this guide for the County of Kauai Department of Water?
Yes. This guide is for the County of Kauaʻi Department of Water and official kauaiwater.org resources.
Best Way to Use Kauaʻi Department of Water Services in 2026
For general help, call 808-245-5400. For billing, service start, transfer service or account questions, call 808-245-5442 or email billing@kauaiwater.org. For after-hours water emergencies, call 808-241-1711.
For programs, use official Department pages: water conservation for low-flow fixtures, water quality for annual reports, forms for applications, service outages for emergency contacts, and water systems for system information.
Editorial note: This guide is informational and helps Kauaʻi customers find official Department of Water services faster. Phone numbers, lobby hours, emergency routing, billing procedures, forms, conservation program rules and water quality report links can change, so always confirm final details directly on official kauaiwater.org pages before taking action.