CUSTOMER SERVICE
Applications & Permits
If you are developing a new property, the building permit process requires you to obtain clearance from the Board of Water Supply for a water meter. The BWS also reviews all construction plans of private, City, State, and Federal projects that may influence and/or impact BWS facilities. Here are common forms needed for various types of development.
Application and Permit Services
- Trenching, Excavation & Boring Permit Form
(updated 02/23/2021) - Permitting Review Drop-Off Form
- Temporary Water Service Application
- Request for Water Service for Agricultural Purposes
- Sample Request for Water Service for Agricultural Purposes
- Application for Segregation of Water Service (updated: 08/11/2020)
- Inquiries on Water Availability
- Fixture Unit Computation Worksheet
- Billing Authorization Form
- 120 Day Notice
- Refund Request for BWS Customers (account service holders)
- Refund Request for Non-BWS Customers
Building Permits
- Accessory Dwelling Unit (ADU) - Questions and Answers
- Single-Family Dwelling Checklist
- Conditions for Water Service Above the Service Limit
- Non-Single-Family Dwelling Checklist
- Automatic Fire Sprinkler Review Notes (updated: 11/24/2020)
- Typical BFPA Installation Detail Plan
- Air Conditioning Note
- Residential and Non-Residential Flow Requirements
- Water System Facilities Charges
Construction Plan Review
- Checklist for Construction Plan Submittals (updated: 11/2021)
Other BWS Resources
- Pass / No Pass Map (posted: 08/02/2025)
- Rules and Regulations
- Water System Standards (updated: 08/04/2021)
Related Links
Refer to the following links for more information related to applications and permits.
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Water System Standards
The Water System Standards and Water System External Corrosion Control Standards are available for download from the Board of Water Supply (BWS).
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Maps
The Board of Water Supply's Pass/No-Pass layer is now available for reference through the Department of Planning & Permitting via the Honolulu Land Information System (HoLIS).
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Cross-Connection Control
The Cross Connection Control Section (CCCS) works to ensure that the public drinking water system is protected from possible contamination through cross-connections and backflow conditions.
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Commercial Development
Large commercial developments often require master plans and more complex and thorough analysis of the ability of the existing water system to accommodate the specific development request. In addition to meeting water pressure, adequacy, and fire protection requirements as covered under the Board of Water Supply (BWS) Water System Standards and the BWS Rules and Regulations, large developments can require additional water facilities such as a water source, storage reservoir, and/or transmission mains.
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Project Review
The Board of Water Supply (BWS) Project Review Section responds to requests for water service from developers/subdividers, landowners, and realtors. The team evaluates the ability of the existing water system to accommodate the specific development request.
Contact Us
Project Review
- (808) 748-5440
- water master plans, water availability, system pressure, flow data
Service Engineering
- (808) 748-5460
- water pressure, building permit applications, new and existing water services
Construction Plan Review
- (808) 748-5450
- construction plans of private, City, State, and Federal projects that may influence and/or impact BWS facilities
Updated: 10/24/2025