This century’s most crucial environmental policy challenges include freshwater protection. Fresh water is essential for everything from the supply of our drinking water and food to our ability to harvest and produce fisheries. Freshwater also supports our energy grids, biodiversity, public health, and local economies.
Freshwater systems like rivers, lakes, wetlands, aquifers and floodplains are all facing increased pressures.
There are a whole host of factors contributing to freshwater challenges, including poor land management, pollution, over-extraction, invasive species, and dams and drains. In many areas, the problem is not one single pressure acting on a catchment. Instead, many factors are interacting and causing issues in the same place.
This is why it is not possible to deal with the threat to freshwater policy as simply a water-management problem. It is inextricably linked to other issues including agriculture, industry, urban planning, biodiversity, climate resilience, public health, and economic development.
The purpose of safeguarding freshwater is about more than making rivers cleaner. It is about ensuring the systems on which people and nature alike depend survive and flourish.
Freshwater systems are not just empty channels
Rivers are more than just empty waterways moving water from A to B. Lakes are more than simple reservoirs. Wetlands are more than empty land waiting to be reclaimed.
Freshwater systems are living.
A living system supports life, including fish, insects, birds, plants, amphibians, mammals and microorganisms. It moves nutrients, it transports sediment. It recharges groundwater, helps control floods, filters pollution, connects landscapes and more.
Protecting freshwater and aquatic ecosystems, therefore, demands a holistic approach beyond the water volume alone. For example, you could have a river that still contains water, or a lake with a full water level, but it may still be degraded by nutrient pollution. A wetland that still appears on a map may no longer be functioning properly.
We must focus environmental policy around the condition of freshwater ecosystems, and not just on water availability alone.
Water quality and pollution risks are still a key freshwater challenge
Pollution in freshwater systems comes from many places.
Runoff from agricultural land can carry fertilizers, manure, pesticides and sediment into freshwater systems. Urban waste waters can bring in nutrients, chemicals, pharmaceuticals and pathogens. Industrial sites can discharge chemicals, heavy metals, solvents and oils. Poorer waste management can also see plastics, contaminated leachate and runoff reaching freshwater.
Some pollution is direct, from identifiable sources like pipes or industrial outfalls. Others are diffuse in nature, coming from farms, roads, settlements and catchments. It is often far more challenging to control diffuse sources as they do not originate from a single identifiable point.
Pollution and chemical risks become central to freshwater policy at the point where strong permitting, emission limits, monitoring, inspections and enforcement are needed.
We need to know what is entering freshwater and where it is coming from, and whether policies are reducing pressure on these systems to safeguard water security and ecosystems.
Agriculture and freshwater need to work together
Agriculture is the largest user of freshwater around the world. To grow crops and raise livestock, we need to use plenty of water. And while that is essential, the way we farm also affects water quality and ecosystem health in our river catchments.
Sediments can wash off farms into waterbodies; nutrient runoff can cause harmful algal blooms; inappropriate pesticide use can poison aquatic organisms; drainage drains wetlands and alters river flows.
It does not mean we should treat agriculture as if it should be held solely to blame. Farmers operate in a reality characterised by fluctuating weather patterns, volatile market trends, expensive input costs and food demand.
What we should be saying, however, is that without improved land management decisions, we cannot hope to improve the quality of our water.
Buffer strips, cover cropping, restoration of riparian wetlands, improving nutrient management, reduced pesticide risks, soil protection measures and more efficient irrigation can all reduce the pressure on freshwater.
Supporting agricultural policy to reduce environmental risks associated with pesticide use also goes hand in hand with restoring the quality of rivers, wetlands and groundwater.
Agriculture policy and water policy are, therefore, not fit for purpose when they are designed separately.
Water quantity is becoming more uncertain
Water protection is not solely about water quality, it is also about water quantity.
Some places are facing increasing water shortages, while others are seeing increased flooding and more erratic seasonal flows. In fact, for many parts of the world, these extremes will occur more frequently: too little water at the wrong time and too much water at the wrong time.
The problem of managing water quantity becomes more challenging with climate change. Rising temperatures may increase evaporation rates; droughts may reduce water flow and limit groundwater recharge; extreme rainfall events may overwhelm drainage systems or wash agricultural pollutants into waterways; flood events may cause damage to critical infrastructure, resulting in spreading water pollution.
This connects the issue of freshwater policy to climate policy and energy policy. Water is needed for agriculture, ecosystems, hydropower, power generation, industry and people. The capacity of our climate system to adapt to future change will depend on how water is managed.
Protecting freshwater is about planning for variability rather than simply assuming that the future will be like the past.
Groundwater needs more attention
It is easy to overlook groundwater.
Aquifers provide drinking water for communities; they provide a reliable water resource for irrigation and they feed rivers, springs and wetlands. But because they can remain hidden, groundwater depletion and contamination may go unseen for long periods.
Groundwater, once polluted, can be very hard, slow and expensive to clean. Similarly, aquifers can take many years or, in some cases, never return to their full capacity once over-abstracted.
This is why freshwater protection must include stronger governance on groundwater abstraction, including monitoring of groundwater withdrawal levels, controlling sources of contamination, management of aquifer recharge areas, protecting wetlands and ensuring surface water and groundwater policies are aligned.
Rivers rely on groundwater during dry periods. Wetlands rely on groundwater. The failure to treat groundwater and surface water resources as a single system will result in the wrong management decisions.
Biodiversity depends on clean and connected waters
Freshwater ecosystems are one of the most significant ecosystems for biodiversity.
Rivers, streams, lakes, wetlands and floodplains provide breeding habitats, feeding habitats and migration routes for a range of species. We require connected river systems for fish, wetlands for amphibians, floodplains and lakes for birds, and intact habitats for insects and microorganisms.
When these freshwater ecosystems become polluted, fragmented, or drained, the result is a decline in biodiversity, habitats, and ecosystem services.
Maintaining connectivity is particularly critical; structures such as dams, culverts, embankments, and poorly designed infrastructure can obstruct movement and disrupt natural water flows. Indeed, restoring river connectivity can sometimes be as vital as improving water quality.
Consequently, freshwater biodiversity policies must be designed for entire catchments, rather than individual sites.
Cities also need to manage their water differently
Urbanisation is a major driver of environmental change, creating pressures on freshwater resources.
Paved areas generate higher runoff during heavy rain and can discharge a range of contaminants into rivers and streams, including oil, metal residues, and litter, while the overflow of combined sewers can exacerbate the situation.
Urban sprawl can eliminate wetlands and floodplains, while the rising demand for water in urban areas can increase the strain on local water resources.
A new approach to urban water management is therefore required. Urban planners could invest in green infrastructure, such as rain gardens, restored rivers, permeable surfaces, urban wetlands, canopy cover and protection of wetland areas.
Not only could these approaches help to prevent flooding, but they could also enhance water quality and public spaces.
Urban water policy should not be solely focused on traditional infrastructure such as pipes and drains. While such engineering approaches still have their place, we also need to use nature to protect and conserve our water resources.
It is essential to include protection of freshwater systems within urban planning, housing, infrastructure, transport, and public health policies.
Waste and resource use affect freshwater too
Waste and resource use have direct implications for freshwater.
Plastic waste can flow through rivers and end up in estuaries and ultimately oceans. Mining can adversely affect both water quality and flows. Uncontrolled waste sites have the potential to cause chemical pollutants to leach into local water resources. Improper waste management can lead to hazardous substances from industrial plants being discharged into the environment. High rates of material extraction and use can increase pressure on local catchments.
This highlights the strong links between freshwater protection and resource use and pressures.
A move to a more circular economy could help to alleviate some of the pressures placed on freshwater resources. Reducing waste overall and improving material choices, product design, and waste management practices could lower the risks of pollution and environmental impact.
Water policy therefore needs to be tied to waste, industry, and resource-efficiency policies.
Freshwater degradation comes at a huge cost
The degradation of freshwater resources comes at a huge cost.
Contaminated freshwater can result in expensive water treatment costs. Uncontrolled flooding can result in public and private sector losses. A decline in the number and size of fish stocks can lead to job losses. Reduced water supply can impact agriculture, industry, and electricity generation. Poor-quality freshwater can impact human health and tourism.
The degradation of freshwater resources therefore represents an economic, in addition to an environmental, problem.
The economic value of freshwater should be factored in. Preventing water pollution and degradation is often the cheapest option. Restoring a wetland area, for instance, can lower flood-protection costs. Healthy catchment areas help provide high-quality water for agriculture and for human consumption.
However, when this is not reflected in budget and policy planning, we are simply moving the bill to another sector: health costs, disaster recovery, infrastructure repair and replacement, productivity costs, or the bills we receive.
Governance is the real test
Protecting freshwater is ultimately a governance question. Effective policies require defined accountability, accurate data, binding standards, meaningful public engagement, financial backing and cross-sector coordination.
Without this governance capacity, water can remain polluted, overdrawn and ecologically degraded even where aspirational protection targets have been set.
For this reason, rules, data, and how policies are actually implemented all matter so much.
Every ministry and agency with jurisdiction over a river, whether water, agriculture, planning or environment agencies, or local government and public health authorities, determines the condition of freshwater environments. Where they function independently, freshwater protection is often fragmented or ineffective.
Catchment-based governance offers a solution. River systems rarely line up with political borders. Environmental objectives should follow the system boundaries we are trying to protect rather than those of the government institution managing it.
A global challenge with local consequences
Freshwater protection is one of the major global environmental challenges. Yet its impacts are experienced at the local level.
When a river is degraded, it impacts the people who depend on it nearby. When a wetland is lost, it increases flooding risk in the region. When an aquifer is depleted it impacts farms and communities. When a lake is polluted it impacts fisheries, tourism and drinking water supplies.
Understanding the human reality is important. Everyone needs access to information and a say in management decisions. Local stakeholders can provide valuable data on water quality degradation, illegal water use, habitat loss and changes to river ecosystems.
Freshwater policy works when it actively includes people and their rights rather than just treating people as mere users.
What stronger freshwater protection looks like
Better freshwater protection would include:
- Water-quality standards that are clear and measurable;
- Enhanced monitoring of water systems, including rivers, lakes, wetlands and groundwater;
- Strengthened control of agricultural and industrial pollution;
- Protection of wetlands and restoration of floodplains;
- Cautious abstraction and water allocation during times of scarcity;
- Integration of surface water and groundwater policy;
- Land and urban planning that reduces water runoff and associated pollution;
- Catchment-based governance;
- Public access to water quality and usage data;
- Sustainable funding for enforcement, implementation and restoration work.
None of these interventions can function in isolation. They are components of a single system.
You cannot protect freshwater environments through a single department, law or intervention alone. It requires coordinated and coherent policymaking to integrate land use, water management, climate response, industry, agriculture and people into a shared environmental objective.
Freshwater as a foundation for resilience
Freshwater management is not just one of many environmental concerns. It is a pillar of resilience.
Access to clean and dependable water resources helps safeguard human well-being, food production, ecosystems, public health and economic prosperity. The deterioration of freshwater systems undermines progress in these other areas.
A key opportunity, then, for environmental policy is to recognise the centrality of freshwater protection, rather than treating it as something that should come after other objectives.
Rivers, lakes, wetlands and aquifers need strengthened protection before damage can become impossible to reverse. This requires cutting pollution, responsibly managing water resources, rehabilitating natural habitats, strengthening regulatory governance, and acknowledging water considerations across all policy domains.
The integrity of freshwater systems links climate adaptation, land-use management, biodiversity conservation, public health and economic growth.
Protecting freshwater systems is not optional. It is one of the fundamental prerequisites for a stable and sustainable society.
