Maddaus Water Management

Being a remote company for the past 20+ years, we are grateful for having the opportunity to give back during this rough time by sharing our resources, knowledge and experience of working remotely with many others in our industry. We have partnered with the Alliance for Water Efficiency and the California Water Efficiency Partnership to help conduct free weekly webinars with people inside and outside the industry (it’s open to anyone!) to share tips, tricks and tools about working remotely. If you, or anyone you know, needs a little more support for working remotely right now, please check out the link below with information regarding the webinar, including recordings:

Water Conservation Engineering

Our Maddaus Water Management team thrives on using our extensive knowledge of water resources planning, specializing in demand analysis, water conservation and drought planning to help water utilities around the globe. More than 20 years ago, Maddaus Water Management’s first project was supporting the water conservation planning needs of Bangkok, Thailand. Since that time, our work has extended to support both publications and training workshops for the United Nations Economic and Social Commission for Asia and the Pacific Region. Our team has completed over 460 projects, focused mainly in the United States.

Our team brings an unparalleled combination of water resources planning expertise with a well-honed understanding of water demands, conservation, drought and water supply reliability. In 1999, William Maddaus, the company’s founder, developed the first water conservation model. This Decision Support System (DSS) model has been used in over 29 states across the nation and internationally in Canada, New Zealand and Australia, representing a population of over 50 million people.

A full 90% of our clients are municipal agencies or governmental entities. More than 85% of our work comes from repeat clients who wish to expand on our services or via word of mouth referrals. We are a family owned business that operates from Northern California.


Maddaus Water Management, brings extensive knowledge of demand analysis and water conservation. MWM is an internationally recognized water conservation authority as well as a certified Micro Small Business Enterprise and Women Owned Business in California.


Maddaus Water Management, has developed multiple customer software solutions for water utilities. We also have developed the world's leading water demand and conservation software tool called the DSS Model.


Maddaus Water Management, has a long and distinguished history starting with the founding of the company by William Maddaus in 1995. Explore the history of Maddaus Water Management.