California Water Service Group

What California Water Service Group does

California Water Service Group (NYSE: CWT) is a holding company for regulated water and wastewater utilities, founded in 1926 and headquartered in San Jose, California. It operates through five wholly-owned subsidiaries — California Water Service, Hawaii Water Service, New Mexico Water Service, Texas Water Service, and Washington Water Service — collectively serving more than 2.2 million people through approximately 584,000 service connections across five (soon seven) western U.S. states. It is the largest regulated water utility in the western United States and the third-largest publicly traded regulated water utility nationally.

The company's core offering is the delivery of safe drinking water and wastewater treatment/distribution through owned physical infrastructure — wells, reservoirs, treatment facilities, and distribution mains — operated within exclusive service territories. Underlying capabilities include a GPS correction/RTKBase NTRIP system used across seven field districts, a G480 Platinum-certified water-use efficiency program (first utility to earn the updated G480-25 standard), and CPUC-authorized regulatory mechanisms such as the Water Revenue Adjustment Mechanism (WRAM) and sales reconciliation process that improve rate-recovery predictability. The company also runs a low-income Customer Assistance Program (CAP) and a community philanthropy program.

Revenue is generated through regulated tariff rates set by state public utilities commissions, primarily the California Public Utilities Commission (CPUC), supplemented by smaller non-regulated streams (e.g., Texas wastewater operations through TWSC, Inc.). The model is effectively subscription/recurring: customers are billed for metered usage, and revenue growth is driven by rate-case approvals, customer/connection additions, and infrastructure investment recovered through the rate base. Pricing is set in periodic General Rate Cases — the April 2026 CPUC decision authorized cumulative rate increases of 10.9% (2026), 4.7% (2027), and 5.1% (2028), adding $182.6M of annual revenue by 2028 and supporting $1.45B of authorized infrastructure investment through 2027. GTM is institutional/regulatory rather than consumer-facing — growth is achieved via rate-base expansion (target $3.21B by 2027), tuck-in acquisitions, and geographic expansion into new western states.

Name

California Water Service Group

Legal name

California Water Service Group

Website

https://calwatergroup.com

Company type

Public

Founded year

1926

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

California Water Service Group is a holding company for regulated water and wastewater utilities serving over 2.2 million people through five subsidiaries across California, Hawaii, New Mexico, Washington, and Texas, with rates set by state public utilities commissions.

Ownership category

akta.pro rank

Product category

Water Utility Services

NAICS

Water, Sewage and Other Systems (2213), Water Supply and Irrigation Systems (22131), Sewage Treatment Facilities (22132)

SIC

Water Supply (4941), Sanitary Services (4950)

akta.pro primary industry

Water Supply & Wastewater Utilities Administration (BPAIACAG)

akta.pro secondary industries

Water & Wastewater Pipeline Construction (Mains, Force Mains, Interceptors) (IMAFAGAC), Industrial Wastewater & Effluent Treatment Services (BPALAHAD)

Keywords

• Regulated water utility
• Wastewater services
• Water distribution infrastructure
• Water treatment services
• Utility rate regulation

Headquarters

HQ city

San Jose

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Regulated Water Utility Services: Revenue from providing regulated water and wastewater services to residential and commercial customers across California, Hawaii, New Mexico, Washington, and Texas through utility subsidiaries. Rates set through CPUC and other state regulatory proceedings. Q1 2026 operating revenue of $214.6M (up 5.2% YoY). Full-year 2025 revenue of $1,000.1M.
2. Non-regulated Water and Wastewater Services: Non-regulated revenue from services outside of standard rate regulation, including Texas operations through TWSC, Inc. Q1 2026 non-regulated revenue of $5.2M.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

California Water Service Group provides regulated water supply, treatment, distribution, and wastewater services to approximately 2.2 million people through 497,600+ service connections across five western U.S. states. Operations are conducted through five wholly-owned regulated subsidiaries in California, Hawaii, New Mexico, Washington, and Texas, with rates set by state public utility commissions including the CPUC. The company focuses on infrastructure investment, water quality compliance, and conservation programs, with $1.45 billion in authorized infrastructure investments through 2027.

Product overview

California Water Service Group is a regulated water and wastewater utility company providing essential water services through a network of five regional subsidiaries. The company operates as a single, unified regulated utility business organized by geographic service territories, rather than a platform-plus-modules architecture. The five subsidiaries (California Water Service, Hawaii Water Service, New Mexico Water Service, Texas Water Service, and Washington Water Service) collectively serve water and wastewater needs across their respective regions, with the California subsidiary representing the largest operations by customer base and service connections.

Differentiator

Problem solved

Functional benefit

Products and services

• California Water Service (Cal Water)

Quantifiable outcome

• 100% compliance with federal and state water quality standards across 630,000+ water quality tests
• +6 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• BVRT Utility Holding Company LLCminorStrategic or Co-development Partner · 8 January 2026California Water Service Group is expanding investment and operations in Texas through becoming the sole owner of BVRT Utility Holding Company LLC and its subsidiaries, including new water and wastewater infrastructure projects. Approval received to operate a new utility in Caldwell County, with further infrastructure developments expected by 2036.

Scale indicators12 records

Recent moves2 records

Direct peers

• American Water Works Company: Largest publicly traded US water and wastewater utility, serving ~14M people across 14 states. Direct peer with the same regulated utility model, CPUC-style state commission regulation, multi-state expansion via M&A, and rate base growth strategy. Closest large-cap comparable for CWT.
• Essential Utilities: Regulated water and natural gas utility (formerly Aqua America) serving ~5M people across 10 states. Direct peer with comparable business model — regulated water/wastewater services, M&A-led geographic expansion, infrastructure investment program, and dividend growth orientation.
• SJW Group: San Jose-based regulated water utility serving California, Texas, Connecticut, and Maine. Highly comparable to CWT given California overlap, similar customer scale (~750K connections), and identical regulatory model under CPUC. Often viewed as CWT's closest direct competitor.
• Middlesex Water Company: New Jersey-based regulated water and wastewater utility serving ~500K people. Direct small-cap peer with the same regulated utility model, rate base growth strategy, dividend growth orientation, and concentration in a single primary state.
• Artesian Resources Corporation: Delaware-based regulated water utility and wastewater services company. Direct small-cap peer with the same regulated utility model, multi-decade dividend growth history, and similar focus on rate base growth through infrastructure investment.
• York Water Company: Pennsylvania-based regulated water utility founded in 1816 — one of the oldest US investor-owned utilities. Direct small-cap peer with the same regulated utility model, similar dividend growth orientation, and consistent infrastructure investment approach.
• Global Water Resources: Arizona-based regulated water and wastewater utility actively pursuing consolidation of fragmented utilities. Direct peer with the same regulated model, aggressive M&A strategy targeting rate base growth, and high-growth positioning in a water-scarce western US market similar to CWT's territory.
• H2O America: Western US water and wastewater utility (formerly Western Water Works, successor to Connecticut Water Service and SJW Group merger). Direct peer operating in California and adjacent states with overlapping regulatory environment and similar customer mix.

Regional players

• Consolidated Water Co. Ltd. Water utility primarily serving the Caribbean (Cayman Islands, Bahamas, Bermuda). Operates the same regulated water utility business model but in a different geography — useful for understanding the core utility business, though not a US-market competitor.

Broad incumbents

• Severn Trent Plc: Large UK-listed regulated water and wastewater utility serving ~8M customers. Broader peer with the same regulated utility model and rate-setting process (Ofwat in the UK), providing a benchmark for international regulated water utility returns and capital deployment strategy.

Market position

Strengths5 records

Weaknesses5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/california-water-service-company

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries5 records

Funding overview

Funding rounds1 record

Investors

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

M&A

Investments

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

Frequently asked questions about California Water Service Group