Kauai Water Department – Pay Bill, Contact & Services Guide

by
Kauaʻi Department of Water Guide

Pay a Kauaʻi Water Bill, Start Service, or Report a Water Emergency

The Kauaʻi Department of Water is the correct utility for County of Kauaʻi water service. This page replaces the wrong NYC water information that appeared on the old post and gives Kauaʻi-specific payment, billing, service transfer, outage, and emergency contacts.

Use this guide when you need the official Koʻu Wai Customer Account Portal, billing support, start or transfer service help, service outage information, or emergency numbers for nights, weekends and holidays.

Pay Water Bill Call Billing Daytime Emergency After-Hours Emergency
Important correction: Kauaʻi is not served by NYC DEP. Do not use Flushing, NY addresses, 718 phone numbers, or NYC water payment links for a Kauaʻi water bill.
Main Office 808-245-5400 General Department of Water contact.
Billing Help 808-245-5442 Billing, new water services and transfers.
Office Address 4398 Pua Loke Street Līhuʻe, Hawaiʻi 96766.
After Hours 808-241-1711 Nights, weekends and holidays water emergency number.

Choose the Kauaʻi Water Help You Need

Kauaʻi water customers usually need one clear action. Pick the section below before calling or paying so you use the right phone number and avoid delayed help.

I need to pay online Use the official payment page or Koʻu Wai Customer Account Portal. Payment steps
I did not receive my bill Billing can confirm your mailing address and contact details. Billing help
I need service started or transferred Use the official sign-up or transfer service page. Service steps
I have a water emergency Use business-hours or after-hours emergency numbers depending on the time. Emergency help
My area has no water Check service outages and DOW news before assuming it is only your home. Outage checks
My bill is high Check irrigation, toilet leaks, meter movement and outdoor lines first. High bill checklist

How to Pay Your Kauaʻi Water Bill Online

The safest starting point is the official Kauaʻi Department of Water payment page. The Department also references the Koʻu Wai Customer Account Portal for account access and online payments.

  1. Open the official payment page.
    Start here: Kauaʻi Department of Water Pay Your Water Bill.
  2. Use the official customer portal.
    If you are logging in online, use the Koʻu Wai Customer Account Portal linked by the Department of Water.
  3. Keep your current bill nearby.
    Check your account details, customer name, service address, bill amount and due date before submitting payment.
  4. Confirm contact information if anything looks wrong.
    If you did not receive a bill or your mailing address may be outdated, call 808-245-5442 or email billing@kauaiwater.org.
  5. Save payment proof.
    Keep your receipt, confirmation number or screenshot until your payment shows on the account.
Payment safety note: Avoid unrelated third-party payment pages when your due date is close. Start from kauaiwater.org so you know the payment route belongs to the County of Kauaʻi Department of Water.

Kauaʻi Water Billing Help, Missing Bills and Account Questions

Billing Services handles account questions, new water services, transfers and customer bill support. If your bill does not arrive when expected, the Department asks customers to call or email so mailing address and contact information can be confirmed.

Billing need
Official contact
What to prepare
Billing question
808-245-5442 or billing@kauaiwater.org
Account number, service address, bill date and payment status.
New water service
Sign Up or Transfer Water Service
Service address, responsible party, start date and contact information.
Transfer service
Billing Services
Current address, new address, transfer date and forwarding information.
Missing bill
Call 808-245-5442
Mailing address, email, phone number and property/service address.
Past statement amounts
Billing Services
Account holder name, service address and date range needed.
Practical tip: On an island, mail delays, address changes and rental turnovers can create billing confusion. Confirm your mailing address as soon as you move or take over service.

Start, Stop or Transfer Water Service on Kauaʻi

Use the official sign-up or transfer service page when moving into a property, changing account responsibility, transferring service, or making sure billing goes to the correct person.

  1. Open the official service page.
    Use: Sign Up or Transfer Water Service.
  2. Gather property details.
    Have the service address, requested date, account holder name, phone number and email ready.
  3. Contact Billing Services if unsure.
    Email billing@kauaiwater.org or call 808-245-5442.
  4. Confirm who is responsible for payment.
    Rentals, property management accounts and ownership changes can create confusion if the responsible party is not updated.
  5. Save confirmation.
    Keep any form submission, email reply, account setup note or service transfer confirmation.
Move-in reminder: Do not wait until the same day you need water. If information is missing or the account must be updated, same-day handling may not be possible.

Kauaʻi Water Emergency Numbers: Business Hours vs After Hours

Kauaʻi Department of Water separates regular billing questions from emergency water issues. Use the correct emergency number based on the time and urgency.

Water emergency contacts: During business hours, call 808-245-5444 or 808-245-5400 option 1. On nights, weekends and holidays, call 808-241-1711.
Problem
Best action
What to prepare
Water main break or visible street leak
Call the emergency number for the time of day
Nearest address, road name, landmark, water flow and safety concerns.
No water in your area
Check service outages, then call if not listed
Your area, street, whether neighbors are affected and when it started.
Low pressure
Check whether it affects neighbors before calling
Address, fixture affected, neighborhood and pressure change timing.
Private plumbing leak
Shut off water if possible and contact a plumber; call DOW if meter/utility side is involved
Meter behavior, leak location, photos if safe and repair notes.
Emergency on holiday or weekend
Call 808-241-1711
Exact location, problem type and a callback number.
Safety first: If water creates road danger, electrical risk or immediate harm, call emergency services as appropriate. Do not enter unsafe water or traffic to take photos.

Check Kauaʻi Water Service Outages and Scheduled Shutdowns

Kauaʻi Department of Water posts service outage updates and scheduled shutdown notices. This is useful before you assume your home has a private plumbing problem.

Service outage page Check official outage updates for your area before calling. Check outages
DOW news Scheduled shutdowns and water service restoration updates are posted as news items. Open DOW home
Emergency notices Use official DOW emergency notice resources when available. Contact DOW
Local practical tip: If your area has a scheduled shutdown, fill clean containers ahead of time, avoid laundry during the shutdown window, and flush cold water briefly after service returns if the Department gives that instruction.

High Kauaʻi Water Bill Checklist

A high water bill on Kauaʻi can come from irrigation, toilet leaks, outdoor hose leaks, vacation rental turnover, pressure-washing, livestock/garden use, or a private service line leak. Check these before assuming the meter is wrong.

Toilet leak A running toilet can waste water quietly. Use a dye test or listen for refilling.
Irrigation timer Check sprinkler zones, drip lines, stuck valves and watering schedules.
Outdoor hose bib Garden hoses, spigots and outdoor showers can leak without being noticed.
Vacation or rental use Guest stays, cleaning, laundry and outdoor use can change consumption sharply.
Service line leak Look for soft ground, wet spots, meter movement when everything is off.
Billing address issue If bills are missed, confirm mailing address and contact details with Billing Services.

Have this ready before calling billing

  • Account number and service address.
  • Current bill and previous bill.
  • Payment confirmation if you recently paid.
  • Dates when usage changed.
  • Notes about irrigation, guests, rental turnover or outdoor watering.
  • Leak repair receipt, plumber invoice, photos or parts receipt if a leak was fixed.
  • Mailing address and email confirmation if you did not receive the bill.

Water Conservation and Emergency Preparedness on Kauaʻi

Conservation matters on an island because water supply, weather, drought periods, and localized outages can affect communities differently. Small changes can reduce bill pressure and help protect the island’s water resources.

Situation
Practical action
Why it helps
Dry weather or drought concern
Reduce irrigation time and water early morning only if watering is allowed.
Less evaporation and lower outdoor water waste.
Scheduled water shutdown
Store clean water, delay laundry and check DOW outage updates.
You avoid avoidable water use during service interruptions.
Vacation rental or second home
Check toilets, outdoor showers, irrigation and hose bibs between stays.
Prevents unnoticed leaks from running for days.
High-pressure irrigation
Inspect broken heads, stuck valves and overspray onto pavement.
Outdoor leaks can raise bills quickly.
Older fixtures
Replace old toilet flappers, worn washers and leaking shutoff valves.
Cheap repairs can prevent repeated high bills.

Official Kauaʻi Water Department Links and Contacts

Use these official resources for payment, billing, service transfer, outages, forms, emergency contacts and general Department of Water information.

Pay Your Water Bill

Official payment page and billing FAQ area for Kauaʻi Department of Water customers.

Open payment page
Koʻu Wai Customer Account Portal

Official customer account portal for online account access and water bill payment.

Open portal
Contact Us

Official contact page for billing, emergency, administration, public relations and board contacts.

Open contact page
Sign Up or Transfer Service

Official service setup and transfer resource for customers moving in or changing account responsibility.

Open service page
Service Outages

Official service outage and emergency water service notice page.

Open outages
Applications and Forms

Official forms page for customer service, permits, billing and water service needs.

Open forms

Map: Kauaʻi Department of Water Office

The Department of Water, County of Kauaʻi 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 Water Department FAQs

How do I pay my Kauaʻi water bill online?

Use the official Kauaʻi Department of Water Pay Your Water Bill page or Koʻu Wai Customer Account Portal. Start from kauaiwater.org so you do not use unrelated payment pages.

What is the Kauaʻi Department of Water billing phone number?

For billing, new water services and transfers, call 808-245-5442 or 808-245-5440 option 2. You can also email billing@kauaiwater.org.

What is the main Kauaʻi Department of Water phone number?

The main Department of Water phone number is 808-245-5400.

Where is the Kauaʻi Department of Water office?

The office is at 4398 Pua Loke Street, Līhuʻe, Hawaiʻi 96766.

What are the Kauaʻi Department of Water office hours?

Hours of operation are Monday through Friday, 7:45 am to 4:30 pm. Lobby hours are listed as 8:00 am to 4:00 pm.

Who do I call for a Kauaʻi water emergency during business hours?

Call 808-245-5444 or 808-245-5400 option 1 for water emergencies during business hours.

Who do I call for a Kauaʻi water emergency after hours?

For water emergencies on nights, weekends and holidays, call 808-241-1711.

How do I start or transfer water service on Kauaʻi?

Use the official Sign Up or Transfer Water Service page, email billing@kauaiwater.org or call 808-245-5442 for help.

What should I do if I did not receive my Kauaʻi water bill?

Call 808-245-5442 or email billing@kauaiwater.org so the Department can confirm your mailing address and contact information.

Why is my Kauaʻi water bill high?

Common causes include running toilets, irrigation leaks, outdoor hose leaks, rental turnover, private service line leaks and missed bills due to address issues. Check common leak points and contact Billing Services if the amount still looks wrong.

Is WaterBillGuide.us the official Kauaʻi Department of Water website?

No. WaterBillGuide.us is an independent informational guide. It does not process payments, access accounts, restore service, dispatch crews or represent the County of Kauaʻi Department of Water.

Best Next Step for Kauaʻi Water Customers

If your bill is normal, start from the official Kauaʻi Department of Water payment page or Koʻu Wai portal and save your receipt. If you need billing help, call 808-245-5442. If you have a water emergency, use 808-245-5444 during business hours or 808-241-1711 after hours, weekends and holidays.

Pay Water Bill Billing Help Check Outages After-Hours Emergency

Editorial Review and Disclaimer

This replacement article was rewritten for the County of Kauaʻi Department of Water because the previous post used incorrect NYC water department resources. This version uses official Kauaʻi Department of Water payment, contact, billing, service transfer, outage and emergency resources.

WaterBillGuide.us is not the County of Kauaʻi Department of Water. We do not process payments, access accounts, start or transfer service, dispatch crews, approve billing decisions or manage outages. For account-specific help, contact the official Department of Water directly.

Official resources checked include Kauaʻi Department of Water Pay Your Water Bill, Contact Us, Sign Up or Transfer Water Service, Service Outages, Applications and Forms, County of Kauaʻi Department of Water profile and Koʻu Wai Customer Account Portal resources.

Water Bill Payment, Leak & Utility Help Toolkit

Use this free helper to find the official water bill portal, avoid unsafe payment pages, handle late bills, troubleshoot high usage, prepare start/stop service documents, and contact the utility office with the right details.

Find official payment pages safely
Prepare before late fees or shutoff
Check high bill and leak causes
Useful on every city water guide

Official Water Bill Portal Finder

Enter your city, state, and utility name. This tool creates safe search shortcuts for the official bill pay portal, customer service page, outage line, and start/stop service page.

Safety tip: Use the official city, county, or utility website when paying a water bill. Do not enter card or bank details on a page that only looks like a payment portal but does not clearly identify the official utility.

Safe Water Bill Payment Checklist

Before paying online, use this checklist to reduce the risk of wrong payment, duplicate payment, missed receipt, or third-party confusion.

Important: Some official utilities use third-party processors. That can be normal, but the payment processor should be linked from the official utility website and show clear fee/payment details.

Late Bill, Shutoff Notice & Reconnection Action Plan

Select your situation and get practical next steps. This helps users act quickly without guessing.

Do not wait: If you received a shutoff notice, online payment alone may not stop disconnection. Call the utility billing office and save your confirmation number.

High Water Bill & Leak Troubleshooter

A high bill can be caused by leaks, irrigation, estimated readings, seasonal use, or account/meter issues. Choose the closest problem below.

Quick leak test Turn off all water, then check whether the meter still moves.
Toilet check Put food coloring in tank. If color reaches bowl without flushing, there may be a leak.
Ask utility Request usage history, meter reread, leak adjustment policy, and payment arrangement options.

Start, Stop or Transfer Water Service Checklist

Moving in or out? Choose your situation and prepare the details most utilities commonly request.

Your preparation checklist

Move-out tip: Ask for a final meter read, final bill date, refund/deposit process, and confirmation number when stopping service.

Payment Assistance & Arrangement Finder

If you cannot pay the full water bill, this guide helps you decide what to ask before disconnection or extra fees.

Helpful document list: Keep your account number, photo ID, service address, bill copy, shutoff notice, income proof if needed, repair receipt if leak-related, and payment confirmation numbers.

Water Department Call Script Generator

Generate a clear call or email script before contacting the utility billing office.