To pay for green infrastructure, cities are turning stormwater into an economic resource
As cities grow and climate change increases the frequency of heavy storms, stormwater runoff is becoming a more serious problem. Instead of treating it as a costly waste product, some cities are now giving it economic value. By charging stormwater fees based on the amount of runoff a property generates, municipalities are creating a new source of funding for green infrastructure. This creative approach offers a path forward at a time when traditional infrastructure funding is often limited and stretched thin.
Unmanaged stormwater runoff can carry pollutants, such as oil, trash, and chemicals, directly into local waterways. This can damage ecosystems, harm wildlife, and even affect drinking water sources. On top of that, older “grey” infrastructure—like underground pipes and drains—is often unable to handle large storms. These systems are expensive to maintain and easily overwhelmed during extreme weather, leading to flooding and costly damage. As these problems escalate, cities are seeking smarter, more sustainable methods to manage rainwater.
That’s where stormwater fees come in. These fees are usually based on the amount of impervious surface—like concrete driveways, rooftops, and parking lots—on a property. The more surface area that prevents water from soaking into the ground, the more runoff is generated. That means properties that create more runoff pay higher fees. But there’s a key incentive built in: property owners can earn credits or reduce their fees by installing green infrastructure that manages stormwater on-site.
This approach is already funding a variety of environmentally friendly projects in cities across the country. Rain gardens and bioswales—shallow, planted areas that absorb water—help capture runoff and filter out pollutants. Permeable pavements allow rainwater to seep into the ground instead of flowing into storm drains. Green roofs absorb rainfall and reduce heat in dense urban areas. Constructed wetlands help manage larger volumes of water and improve habitat for local wildlife. Tree planting programs not only soak up stormwater but also cool neighbourhoods and improve air quality.
These green infrastructure projects don’t just solve water issues—they bring many other benefits. They help lower urban temperatures, reduce energy use, support wildlife, and improve public spaces. With the help of stormwater fees, cities are turning basic environmental needs into opportunities for transformation and renewal.
One of the most powerful aspects of this model is how it encourages sustainable behaviour. When property owners see a financial benefit from adding rain gardens or installing rain barrels, they’re more likely to get involved. This distributed effort across a city means the positive effects multiply. Instead of relying solely on city-run systems, everyone becomes part of the solution. It also helps raise awareness about where stormwater goes and why managing it responsibly matters.
Of course, implementing stormwater fee programs comes with challenges. Some residents may not understand why they are being charged, especially if they have never had flooding issues on their property. Ensuring the fees are fair across different neighborhoods—especially lower-income ones—is another concern. Cities must also manage the administrative work involved in tracking fees, credits, and infrastructure improvements. Many are addressing these challenges through public outreach, tiered billing systems, and offering technical help for green upgrades.
Despite these hurdles, the potential of stormwater fees is clear. They provide a steady and reliable source of funding for long-term environmental solutions. They also encourage cities to think beyond short-term fixes and invest in natural systems that work in harmony with the environment, rather than against it.
As urban populations continue to rise and climate-related storms become more frequent, cities will need to adapt quickly. Turning stormwater from a problem into a resource is a bold and practical step in that direction. With the right support, stormwater fee programs and green infrastructure can play a major role in reshaping urban landscapes, making them cleaner, cooler, and more resilient for the future.
