Hawaii Water Service

What Hawaii Water Service does

Hawaii Water Service is a regulated water and wastewater utility operating across multiple Hawaiian islands (Big Island, Maui, Kauai, and Oahu) as a wholly-owned subsidiary of California Water Service Group (NYSE: CWT), a San Jose, California-based utility holding company that celebrated its centennial in 2026. The company provides potable water distribution, non-potable water systems, and wastewater treatment services to residential, commercial, and resort/hospitality customers in defined HPUC-regulated service districts including Ka'anapali, Kalaeloa Barbers Point, Kapalua, Keauhou, Kukio, Poipu, Pukalani, and Waikoloa. Operations began in 2009 (per company history) and the company employs 11–50 people. Customer acquisition is geographically captive under exclusive franchise grants from the Hawaii Public Utilities Commission, which sets rates and approves General Rate Cases. Distribution is conducted through district customer service centers, an online account management portal, automated phone payment, and third-party pay stations (Western Union at Foodland, Walmart MoneyCenter).

The company's core technology consists of conventional water and wastewater utility infrastructure — distribution systems, treatment facilities, and monitoring equipment — augmented by GPS equipment and drone-based field surveys conducted in partnership with ATA Engineering to locate and verify manholes, pipelines, and pump stations (initiated in the Pukalani district in 2026). Customer-facing technology is limited to a standard self-service web portal (myaccount.hawaiiwaterservice.com) and a toll-free automated phone payment system; no public API, SDK, or developer platform is offered. The utility service offering is supplemented by conservation programs (residential and commercial rebates, free conservation kits, leak detection assistance), annual water quality reporting, emergency preparedness services (generator installation, hydrant maintenance, remote monitoring), and community programs including a scholarship initiative ($2,500–$10,000 awards) and a Firefighter Grant Program launched in January 2026.

Hawaii Water generates revenue through HPUC-regulated monthly water and wastewater service fees under district-specific rate schedules, with the most recent approval being a $4.7 million annual revenue increase for the Waikoloa systems effective October 9, 2025. The company has cumulatively invested $33 million in infrastructure improvements since 2019, with parent-company water-system infrastructure investment up 14.8% year-over-year in Q3 2025. Customer segments are organized vertically across residential (primary), commercial, and resort/hospitality (resorts and golf courses in Ka'anapali, Kapalua, Waikoloa, and Kukio). The most recent identifiable inorganic move was the 2022 acquisition of the Kukuiula system; growth is otherwise driven by rate-base expansion, infrastructure capex, and regulatory recovery rather than market-share gains.

Name

Hawaii Water Service

Legal name

Hawaii Water Service

Website

https://hawaiiwaterservice.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Short description

Hawaii Water Service is a regulated water and wastewater utility subsidiary of California Water Service Group (NYSE: CWT), providing potable water and wastewater services to residential, commercial, and resort customers across multiple Hawaiian islands under HPUC regulation.

Ownership category

akta.pro rank

Product category

Water and Wastewater Utility Services

NAICS

Water, Sewage and Other Systems (2213), Sewage Treatment Facilities (22132)

SIC

Water Supply (4941), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Drinking Water Distribution Network Operations (Mains, Valves, Hydrants, Service Lines) (EUANAAAE)

Keywords

• Regulated water utility
• Wastewater services
• Water distribution
• Utility infrastructure
• Water quality reporting

Headquarters

HQ city

San Jose

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Supply Chain, Technology or R&D

Revenue model

1. Water Utility Service: Hawaii Water generates revenue through regulated water and wastewater utility service fees. Rates are set by the Hawaii Public Utilities Commission and include annual revenue increases to fund repairs, upgrades, and operational costs. The company submits General Rate Cases to HPUC to seek recovery of capital investments for infrastructure improvements.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

Hawaii Water Service provides regulated potable water distribution and wastewater treatment services to residential, commercial, and resort customers across defined service districts on the islands of Kauai, Oahu, Maui, and Hawaii (Big Island). Services are priced through HPUC-regulated rate schedules by district and supplemented by an online account management portal, conservation programs with rebates, water quality reporting, and emergency preparedness support.

Product overview

Hawaii Water Service operates as a water utility company providing essential water and wastewater services across multiple Hawaiian islands through a network of district-based operations. The core offerings include potable water distribution, non-potable water systems, and wastewater/sewage treatment services organized across districts including Ka'anapali, Kalaeloa Barbers Point, Kapalua, Keauhou, Kukio, Poipu, Pukalani, and Waikoloa on the islands of Kauai, Oahu, Maui, and Hawaii (Big Island). The company supplements its utility services with customer-facing digital tools including an online account management portal, conservation programs with rebates and free kits, water quality reporting, emergency preparedness services with infrastructure hardening measures, and community programs including a scholarship initiative and firefighter grant program. As a subsidiary of California Water Service Group, Hawaii Water operates under regulatory oversight from the Hawaii Public Utilities Commission.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• $33 million invested in infrastructure improvements since 2019
• +2 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators7 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Middlesex Water Company: Small-cap regulated water and wastewater utility (NASDAQ: MSEX) serving New Jersey and Delaware. Similar size profile, fully regulated rate base model, and dependence on HPUC-equivalent commissions for revenue.
• SJW Group: Holding company for San Jose Water Company and Connecticut Water Service (NYSE: SJW). Comparable pure-play regulated water utility with rate-case-driven economics, similar mid-cap profile, and active M&A history.
• York Water Company: The oldest investor-owned water utility in the U.S. (NASDAQ: YORW), serving Pennsylvania. Comparable small-cap regulated water utility with a long dividend history and rate-base growth model analogous to Hawaii Water's.
• Artesian Resources: Small-cap regulated water utility (NASDAQ: ARTNA) serving Delaware and the Mid-Atlantic. Comparable in scale and pure-play regulated water focus; useful benchmark for rate-base multiples at similar size.
• Essential Utilities (formerly Aqua America): Regulated water, wastewater, and natural gas utility (NYSE: WTRG) operating across multiple U.S. states. Closely comparable in scale of customer base, regulatory mechanics, and acquisition-driven growth strategy in fragmented water markets.

Broad incumbents

• American Water Works Company: Largest publicly traded U.S. water and wastewater utility (NYSE: AWK), serving over 14 million people across 14 states. Directly comparable regulated-utility business model, rate-case-driven revenue growth, and infrastructure reinvestment cycle.
• Veolia North America: Operates regulated and contracted water and wastewater systems across the U.S. and is a likely counterparty in any Hawaii water market consolidation. Comparable in municipal/contract operations and wastewater treatment technology.
• California Water Service Group: NYSE-listed parent company (CWT) operating regulated water and wastewater utilities across California, Hawaii, New Mexico, and Washington. Hawaii Water Service is a wholly-owned subsidiary, making CWT the most direct reference for capital allocation, regulatory strategy, and operational benchmarks.

Emerging players

• Severn Trent: International water and wastewater services company with U.S. operations via Severn Trent Services. Comparable as a potential strategic acquirer of Hawaiian utility assets, with similar regulated-water and wastewater treatment capabilities.

Regional players

• Hawaiian Electric Industries: Parent of Hawaiian Electric Company, the regulated electric utility serving most of Hawaii. While not a water peer, it is the most directly comparable regulated utility operating under the same HPUC regulatory framework and exposed to the same island-specific risks.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/1642852279311179

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Hawaii Water Service