Municipal water system:
from: The Groundwater Foundation

A network of pipes, pumps, and storage and treatment facilities designed to deliver potable water to homes, schools, businesses, and other users in a city or town and to remove and treat waste materials

• American Water Works Company, Inc. - American Water Works Company is the largest publicly traded U.S. corporation devoted exclusively to the business of water. Its 6,500 associates provide water, wastewater and other related services to 15 million people in 27 US states and three Canadian provinces. As part of the water utility industry, the company's services include, water system operation and management, water quality control, water testing and analysis, watershed management, infrastructure investment, engineering services, water conservation initiatives and oversight of state-by-state water regulation
• Anglian Water - operating water and wastewater treatment facilities in the UK and worldwide.
• Aquarion - public water supply company in NY and CT with interests in surplus water company land, contract management of municipal water systems, and timber processing.
• AquaVitae UK Limited - Providers of water services to industrial and commercial customers throughout the UK.
• Arizona American Water Company - An investor owned utility, serving an area within the city of Scottsdale, Town of Paradise Valley and unincorporated areas of Maricopa County. Part of the American Water Works Company, Inc.
• Arizona Water Company - Describes services available and provides information on water use, conservation, tariffs, location map and employment.
• Artesian Water Company - Public water utility in the state of Delaware. Distribution of water to residential, commercial, industrial, governmental, municipal and utility customers throughout the state.
• Alliant Energy  - provides electric, natural gas, water, and steam services to customers worldwide.
• American States Water Company (AWR) - investor-owned public utility company engaged in the purchase, production, distribution, and sale of water.
• Azurix - providers of water and wastewater related services, as well as development and management of water resources.
• Berlinwasser International GmbH - Multinational activities in both the supply, construction and consultancy areas of the water industry. Multi Language web site.
• Biwater Treatment Limited - Design and construction of water and wastewater treatment works and provide engineering consultancy services covering all aspects of the water industry.
• California American Water Company - Wholly-owned subsidiary of American Water Works Company with subsidiaries and affiliates that provide water service to more than 10 million people in 23 states.
• California Water Association - California Water Association (CWA), a consortium of invester-owned water utilities providing water utility services to customers throughout California.
• California Water Service Company - is a public utility supplying water service through 21 separate water systems to customers living in 57 communities throughout CA.
• Cedarburg Light and Water Utility - Locally owned and operated electric and water company in Cedarburg, Wisconsin. Online services, issues, and contact information.
• City West Water - Water and Sewerage Utility for the city of Melbourne Australia. Owned and regulated by the state of Victoria.
• Community Water Company of Green Valley - Member owned water utility serving residential & commercial customers in a retirement community in southern arizona. About 20 minutes south of Tucson.
• Consumers Water Company - Holding company that operates water utilities serving customers in Illinois, Maine, New Jersey, Ohio, and Pennsylvania.News, information and company overview
• Conwa County Regional Water Distribution District - Drinking water supply for Conway County, Arkansas. Service to Morrilton and the surrounding communities Treatment facility, water regulations, customer information, policies, awards, construction updates, and water conservation tips.
• Earnhart Hill Regional Water & Sewer District - Provides water and sewer service to rural areas of Pickaway and Fairfield Counties in Ohio USA.
• East Bay Municipal Utility District (MUD)
• East County Water Control District - Serving Lee County, Florida, provides domestic and commercial water supply and management of water resources including flood control and conservation.
• East Larimer County Water District - Providing quality water service in Larimer County, Colorado.
• ECO Resources, Inc. - provides water and wastewater operation and management services under contract to cities, utility districts, and private companies.
• Environmental Management Corporation - independent operator of water, wastewater, and public works systems in the Midwest.
• Florida Public Utilities Company - distributing natural and propane gas, electricity, and water to different areas in Florida.
• Florida Water Services Homepage - Providing water, wastewater treatment, and other services to the Florida community.
• Great Oaks Water Company - Great Oaks Water Company has been providing public water utility service to the Blossom Valley - Santa Teresa - Edenvale - Coyote Valley area of the City of San Jose since the early 1960's.
• Hawaii American Water Company - Hawaii American Water Company provides sewer treatment services to residents of the Hawaii Kai area exclusively. The wastewater is treated using state of the art techniques and is thoroughly tested before it is discharged.
• Heater Utilities, Inc. - A private water and wastewater utility based in Cary, NC. A wholly-owned subsidiary of Allete.
• Jefferson Utilities - A locally owned and operated electric and water utility serving more than 6,000 customers in Jefferson, Wisconsin.
• Kauai Department of Water - County of Kauai, Department of Water. Contains water quality reports, events, water plan 2020, water systems and water sources, water conservation tips, board meeting information
• Kingsland Water Supply Corporation - Texas water supply company serving Kingsland and Comanche Rancherias. Information on supply statistics, fees, staff and some reports.
• Long Island Water Company - Providing water to 230,000 people in Nassau County in New York State. Contains local information and general water saving advice.
• Maui Water - Department of water supply for the county of Maui, an in depth site dealing with all aspects of water supply on the island of Maui
• Mid Kent Water - Supplying quality drinking water to Consumers in Kent. Also provides a range of water related services with its sister companies.
• Mineola Texas Water Dept. - Water utility in Texas. Maintenance, Emergency Phone Numbers, Water Usage. Part of community web site.
• Monte Vista Water District - County water district formed to provide retail and wholesale water supply services to the communities of Montclair, Chino Hills, portions of the City of Chino and the unincorporated area lying between the cities of Pomona, Chino Hills, Chino and Ontario.
• Nebraska Section American Water Works Association - Association of public water suppliers in the State of Nebraska. Fresh / Clean looking web site. Not really a utility but represents a communication medium for a number of water utilities.
• New Holstein Utilities - A locally owned and operated electric, water, water softener and wastewater utility serving more than 2,275 customers in New Holstein, Wisconsin.
• New Mexico American Water Company - A private water utility providing water to Clovis and parts of Curry County in New Mexico.
• New Richmond Utilities - Locally owned and operated electric, water and wastewater utility, New Richmond, Wisconsin, USA. Business and domestic customers, energy and utility issues.
• Newhall County Water District - One of four water purveyors in the Santa Clarita Valley, California. Currently supplying a population of approximately 25,000.
• North East Water - North East Water provides water and wastewater services throughout the North East of Victoria, Australia.
• North Penn Water Authority - A municipal drinking water company that serves communities in Central Bucks and Montgomery Counties in Pennsylvania.
• Northumbrian Water - supplying domestic and commercial water and wastewater services to the North of England and in Europe.
• Oak Creek Water and Sewer Utility - Service to Oak Creek, Wisconsin and surrounding communities. Service area, billing, and quality report.
• Oconomowoc Utilities - We are a locally owned and operated electric, water and wastewater utility serving over 8,000 customers in the Oconomowoc, Wisconsin area.
• Philadelphia Suburban Water Co. - Philadelphia Suburban Corporation (PSC), is one of the nation's largest investor-owned utilities, providing water and wastewater services to approximately two million residents in Pennsylvania, Ohio, Illinois, New Jersey, Maine, and North Carolina.
• QLD Pure Water Filters - Supplier of water filtration systems for household, farm and industrial applications. Based in Australia
• RAJAC Cluj - REGIA AUTONOMA JUDETEANA APA-CANAL CLUJ Water & Sewerage Company of Cluj County, Romania. Site in both Romanian and English
• Rincon del Diablo Municipal Water District - Water supply company serving the Greater Escondido Valley, California, since 1954.
• River Falls Municipal Utilities - RFMU is a locally owned and operated electric, water, sewer and wastewater utility serving over 4,000 customers in River Falls, Wisconsin.
• Scottish Water - providing water and wastewater services to household and business customers.
• SEDALIB S.A. - Servicio de Agua Potable y Alcantarillado de La Libertad - PERU. Water Utility in Peru, Portugeuse language website.
• Severn Trent Water - Severn Trent Water's website is aimed at domestic customers. It covers everything from information about our wide range of customer services, educational information, to water conservation and environmental issues. The site also provides ideas for some fun days out in the Severn Trent area.
• South East Queensland Water Corporation Limited - The the major supplier of untreated water in bulk to Local Governments and industries in the south east Queensland region, through ownership of Wivenhoe, Somerset and North Pine dams.
• South West Water - South West Water provides water and sewerage services to customers in Devon, Cornwall and parts of Dorset and Somerset. The company is part of Pennon Group Plc.
• Southeastern Colorado Water Conservancy District - History, current events and activities of the District and the Fryingpan-Arkansas Project.This includes highlights of the project including the various dams, reservoirs and available recreational activities.
• SouthEastWater - Water utility serving areas of the South East of England, inparticular Sussex and West Kent. Useful resources on water cycle and extraction.
• Southern Water - A water and sewerage company covering the south eastern part of the United Kingdom
• Sun Prairie Water & Light - Sun Prairie Water & Light is a locally owned and operated electric and water utility, serving more than 7,500 customers in Sun Prairie, Wisconsin.
• Tennessee American Water Company - Serves the Chattanooga area. Water quality reports, investor relations, and customer services.
• Thames Water - A water and sewerage company covering London and the areas round the river Thames
• Three Valleys Municipal Water District - A public agency serving parts of Los Angeles county, supplementing and enhancing water supplies in a cost-effective, environmentally sound manner.
• Three Valleys Water - A water only utility supplying water to the Home Counties and the South East of England. A new and informative website
• Two Rivers Water & Light - A locally owned and operated electric and water utility, providing service to the citizens of Two Rivers. Worth looking at for the (electricity use) power calculator
• Water Industry Business and Investor Summit - The Industry's Most Prominent CEOs, Presidents, Top Analysts, And Leading Consultants As They Discuss The Future Of Water: -Where We Are -Where We're Headed -How To Get There
• Water Management Services (WMS) - South African company Provides "Operational" Management System for Public Service Utilities. The system operates in the areas of ; Water Network, Meter, Sewer, Road and Plant Maintenance.
• Water Online - A B2B website, marketplace for professionals in the water and wastewater treatment industry. Book lists (linked to amazon) information and contacts.
• Watergenius - Internet directory specialising in water purification and associated products. Includes news feed, search facility.
• WaterMaster America, Inc. - provides water sub-metering products and services to commercial and residential rental real estate.
• Western Water - providing safe, sparkling clean water and wastewater services.
• Western Water Company - acquires, develops, and markets wholesale water supplies to cities and water districts in the western United States.
• West of Scotland Water - Water Utility, water distribution, treatment and wastewater treatment. Training and Laboratory Services. Tourisim, Loch Katrine Complex
• West Virginia-American Water - Providing quality water service to 17 West Virginia counties as well as parts of Ohio and Virginia. News, customer service, and contact information.
• York Water Company - regulated utility distributing water to residential and industrial customers.