The imperative for sustainable water management has never been more urgent. As highlighted in the insightful video above, the global community faces unprecedented challenges in ensuring a reliable water supply for all. Approximately 70% of the Earth’s surface is covered by water, yet only about 2.5% of it is fresh water, and a significant portion of that is locked in glaciers or deep underground. This scarcity, exacerbated by climate change, underscores the critical need for a holistic approach to water resources. This is precisely where the One Water Concept emerges as a transformative framework, advocating for an integrated, inclusive, and forward-thinking strategy for managing this essential resource.
For centuries, human civilization has managed water in silos—treating drinking water, wastewater, and stormwater as separate entities. However, this fragmented approach is no longer viable in the face of modern environmental and societal pressures. The One Water concept recognizes that all water, regardless of its source or state, is part of a single, interconnected system and holds inherent value. It champions a shift from traditional linear models to a circular economy of water, where every drop is considered a resource to be managed, recovered, and reused efficiently.
Embracing the One Water Concept: A Holistic Paradigm Shift
The notion of “One Water, One Future” represents a fundamental paradigm shift in how communities, utilities, and policymakers view and manage water. Introduced nationally in the United States around 2016, with the first summit held in New Orleans by the US Water Alliance, this concept gained traction as cities increasingly grappled with issues ranging from aging infrastructure to climate-induced droughts and floods. It is not merely a technical solution but a comprehensive philosophy that integrates various water management strategies, aligning them with broader community goals for resilience, economic vitality, and social equity.
At its core, the One Water concept is built upon four unifying characteristics:
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All Water Has Value: Every form of water—from rainwater and stormwater to wastewater and groundwater—is recognized as a valuable resource. It’s about moving beyond simply “clean” versus “dirty” water and seeing the potential in every drop.
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Multiple Benefits: Water management projects are designed to deliver diverse benefits beyond their primary purpose. For instance, green infrastructure can manage stormwater while also enhancing urban landscapes, improving air quality, and boosting mental health.
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A Systems Approach: This characteristic emphasizes understanding the entire water cycle within a given watershed, from mountains to oceans. Decisions about one part of the system acknowledge their downstream and upstream impacts, fostering a more interconnected and effective management strategy.
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Partnerships and Collaboration: No single entity can solve complex water challenges alone. The One Water concept necessitates collaboration across disciplines (engineers, hydrologists, economists, urban planners, landscape architects, attorneys), jurisdictions (cities, counties, utilities), and sectors (public, private, non-profit, citizens).
The Synergy of Green Infrastructure and One Water Strategies
Green infrastructure (GI) plays a pivotal role in the One Water concept, offering nature-based solutions to complement traditional “grey” infrastructure. GI techniques, such as permeable pavements, rain gardens, green roofs, and urban tree canopies, are designed to capture, filter, and reuse stormwater closer to its source. This reduces runoff, replenishes groundwater, and mitigates the urban heat island effect, while simultaneously creating more livable and aesthetically pleasing urban environments.
Historically, the institutionalization of green infrastructure has presented challenges, particularly in aligning diverse stakeholders with varying professional languages—from engineers focused on flow rates to economists emphasizing financial returns. However, progress has been made. For example, in the United States, regulators like the EPA (Environmental Protection Agency) and DOE (Department of Energy) have begun to assign monetary values to the co-benefits of GI, providing clearer economic incentives for implementation. This approach moves beyond basic cost-benefit analyses to embrace a “triple bottom line” perspective, accounting for social, environmental, and economic benefits.
Monetizing the Intangible: The Triple Bottom Line
The triple bottom line considers the often-underestimated “soft costs” and benefits, such as improved human health, increased livability, enhanced walkability, and boosted property values. While seemingly abstract, economists are increasingly adept at quantifying these elements. For instance, better air quality from urban canopies or reduced flood risk due to permeable surfaces can be translated into tangible economic savings and gains, fostering a compelling case for investment in green infrastructure as part of a broader One Water strategy. This has allowed cities like Philadelphia, Portland, and Los Angeles to develop robust stormwater utility programs, where impervious surfaces are taxed to generate revenue for GI projects.
Addressing Climate Change and Water Scarcity
The speaker in the video pointed out that carbon dioxide levels remained stable for hundreds of thousands of years before sharply rising around 1950, directly correlating with global temperature increases. This era, dubbed the Anthropocene by geologists and anthropologists, signifies a period where human activities have become the dominant influence on Earth’s geology and ecosystems. In this context, the One Water approach offers critical pathways for climate resiliency.
By integrating various water sources and management techniques, communities can better adapt to the unpredictable impacts of climate change, such as more intense storms, prolonged droughts, and increased sediment runoff from wildfires. The case of the Salt River water project north of Phoenix, where devastating fires led to massive sediment issues in reservoirs, illustrates the interconnectedness of watershed health and urban water supply. Here, initiatives like those by The Nature Conservancy, which works on reforestation and sediment diversion upstream, are crucial components of a holistic One Water strategy.
The Six Focus Fields of One Water Implementation
The US Water Alliance has identified six key areas where the One Water concept is being applied:
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Reliable and Resilient Utility: Ensuring water utilities can consistently provide safe, affordable water services, adapting to new challenges like climate change and population growth. This includes investing in both traditional and green infrastructure, and exploring innovative water sources.
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Thriving Cities: Integrating water planning across all municipal departments (water, wastewater, transportation, parks) to enhance urban livability, public health, and economic vitality through responsible water management.
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Business and Industry: Promoting water-efficient practices and resource recovery in commercial and industrial sectors, including mining and manufacturing, to reduce environmental impact and ensure sustainable operations.
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Sustainable Agriculture: Implementing water-efficient irrigation methods, protecting water quality from agricultural runoff, and exploring alternative water sources to support food production sustainably.
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Social and Economic Inclusion: Ensuring equitable access to clean, affordable water and sanitation services for all community members, regardless of income or location. This often involves targeted programs and financial assistance.
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Environment: Protecting and restoring natural aquatic ecosystems, such as wetlands, rivers, and habitats, recognizing their intrinsic value and their role in the overall water cycle and community well-being.
Each of these focus areas has specific action items that communities can pursue to advance One Water principles. For instance, enhancing riparian areas, as Tucson Water is doing with the Santa Cruz River by diverting cleaner wastewater to restore habitat, exemplifies a utility’s commitment to environmental stewardship.
Innovation and Practical Applications: Case Studies
Real-world examples demonstrate the One Water concept in action, pushing boundaries and fostering creativity in water management:
Tucson’s Rainwater Harvesting Initiative
In Tucson, Arizona, a city in an arid region, water efficiency is paramount. Tucson Water has implemented a unique rebate program for rainwater harvesting, encouraging residents to install cisterns or passive harvesting systems. Recognizing that upfront costs could be a barrier for low-income residents, they introduced a loan and grant program. This innovative scheme allows eligible households to receive a grant, and if they opt for a larger system, a loan that is often fully covered by the subsequent rebate (approximately 85-90% of the time). This initiative not only conserves potable water but also promotes social equity by making sustainable practices accessible to all.
From “Toilet to Tap” to “Toilet to Beer”
Public acceptance of reclaimed wastewater for direct potable use, often termed “toilet to tap,” faces significant psychological hurdles. To address this, several jurisdictions in Arizona have launched a creative “toilet to beer” challenge. A mobile treatment plant, housed in a semi-trailer, purifies wastewater to brewing standards, which is then supplied to local breweries. The resulting beers are showcased in tasting contests, aiming to demonstrate the safety and quality of reclaimed water in a less intimidating and more engaging way. This clever public relations strategy seeks to shift perceptions and pave the way for future water reuse initiatives.
Portland’s Daylighting River
Portland, Oregon, a leader in green infrastructure, has undertaken a remarkable project to “daylight” an underground river that was previously piped. By uncovering and restoring this natural waterway, they have transformed a hidden urban problem into a vibrant ecological asset. The project, undertaken in collaboration with organizations like Audubon, has brought back diverse wildlife, including various water birds, to the urban core, creating a sense of place and demonstrating the immense ecological and community benefits of integrated water management.
Building Capacity and Fostering Collaboration
The success of the One Water concept hinges on collaboration and the continuous building of capacity among professionals. Networks like the Green Infrastructure Leadership Exchange provide vital platforms for public jurisdiction staff, non-profits, and funders to share challenges, successes, and best practices. These convenings, such as those held in Philadelphia and Portland, bring together dozens of cities to learn from each other, particularly on developing metrics, maintenance protocols, and institutionalizing policies.
Significantly, private foundations, including the Piscis Foundation and Bluebird Foundation, are investing millions not just in projects but in cultivating this network and capacity. They recognize that empowered and connected teams are better equipped to implement and sustain green infrastructure and One Water initiatives, highlighting the importance of fostering a collaborative mindset among regulators, regulated entities, and community stakeholders.
Flowing Insights: Your One Water Questions Answered
What is the ‘One Water Concept’?
The One Water Concept is a holistic approach that treats all water—drinking water, wastewater, and stormwater—as part of a single, interconnected system. It aims for sustainable management by recognizing the value in every drop and promoting its efficient use and reuse.
Why is the One Water Concept important today?
It is important because global challenges like water scarcity and climate change require a more integrated approach than traditional, fragmented water management. One Water helps communities become more resilient and ensures a reliable water supply for everyone.
What are the main ideas behind the One Water approach?
Key ideas include recognizing that all water has value, designing projects for multiple benefits, taking a systems approach to the entire water cycle, and encouraging strong partnerships and collaboration among different groups.
What is Green Infrastructure and how does it relate to One Water?
Green Infrastructure uses nature-based solutions like rain gardens and green roofs to manage water. It supports the One Water concept by naturally capturing, filtering, and reusing stormwater, which reduces runoff and provides environmental benefits.
