The Invisible Invoice

These are rough estimates based on existing research, not a precise accounting, and they are almost certainly conservative. The full economic value of ecosystem services in urban environments is notoriously difficult to price and almost always underestimated. What the numbers illustrate is the direction: a neighborhood farm is generating significant public goods year after year, and receiving nothing for them from the public it serves. The food it sells captures some of its value. The ecosystem services it provides capture none.

Reading the Invoice Line by Line

Stormwater: The Service Cities Pay Billions to Replicate
When rain falls on a parking lot, it becomes a problem almost immediately. It picks up oil, heavy metals, and pollutants as it flows across impervious surfaces, overloads storm drains, contributes to downstream flooding, and delivers a concentrated pulse of polluted water to local waterways. Cities spend enormous sums engineering systems to manage this flow. The EPA has documented that green infrastructure, vegetated surfaces that absorb and filter stormwater naturally, costs 15 to 80 percent less in capital expenditure than conventional gray infrastructure, with maintenance costs approximately 25 percent lower.[2] A Chester County, Pennsylvania analysis found that green infrastructure’s stormwater pollutant removal was worth $16 per year per acre for nitrogen, $256 per year per acre for phosphorus, and $1,595 per year per acre for sediment removal, with a total estimated value of $107
million in avoided costs across the county.[3]

A well-maintained farm bed, especially one built on years of composting and cover cropping, performs this function continuously. Healthy, organic-rich soil can absorb water at rates many times higher than compacted urban soil or impervious surfaces. Every acre of farmland in an urban watershed is an acre that is not generating stormwater runoff, and the value of that function, measured against what it costs cities to manage that runoff through engineered systems, is both real and substantial.

Urban Heat: The Cooling That Money Can’t Easily Buy
The urban heat island effect is one of the most well-documented consequences of replacing natural landscapes with built infrastructure. Cities are typically 2 to 5 degrees Fahrenheit warmer than surrounding rural areas, because asphalt and concrete absorb and radiate heat while vegetation cools through evapotranspiration and shade.[4] Heat-related deaths already average approximately 490,000 annually worldwide and are projected to increase significantly due to climate change.[5] The economic costs, in healthcare, in reduced labor productivity, in energy demand for cooling, are substantial and growing.

Urban farms and community gardens are among the most effective nature-based solutions for local heat reduction. A 2024 systematic review in ScienceDirect found that urban green spaces can reduce local air temperatures by 2 to 4 degrees Celsius in their immediate vicinity, with cooling effects extending 50 to 150 meters from the vegetated area.[6] For a neighborhood where residents without air
conditioning are at serious health risk on summer days, a two-degree temperature reduction in the immediate blocks around a community farm is not an amenity. It is a health intervention, one that the farm provides without any public investment in cooling infrastructure.

Pollinators: The $34 Billion Service That Depends on Habitat
Insect pollination services add more than $34 billion in economic value to U.S. agricultural crops annually, according to the U.S. Fish and Wildlife Service.[7] Honey bees account for up to $5.4 billion of that value; native pollinators, with bumble bees, butterflies, solitary bees, moths, and others, contributing the rest. The foods most dependent on pollination are exactly the ones most central to
human health and neighborhood farm production: fruits, vegetables, nuts, and legumes. Without adequate pollinator populations, these crops decline in yield and quality. 

Pollinator populations are under pressure across the United States, driven by habitat loss, pesticide exposure, and the elimination of the diverse, flowering plant communities that native pollinators need to survive. Urban and suburban areas, counterintuitively, can be important refuges: a community farm that maintains pollinator strips, grows diverse flowering crops, avoids synthetic pesticides, and provides nesting habitat can support pollinator populations that serve not just the farm itself but every garden and small orchard in the surrounding neighborhood. This is a public good that the farm provides to its neighbors at no charge. The bees do not charge a fee when they visit the garden two blocks over.

Carbon Sequestration: The Service with an Emerging Price
Soil is the largest terrestrial carbon sink on earth, and the management of agricultural soil has an enormous bearing on whether that carbon is sequestered or released. Conventional tillage and synthetic inputs tend to release soil carbon. Regenerative practices like composting, cover cropping, no-till or minimal-till management, and diverse rotations build soil organic matter and sequester carbon
over time. Indigo Ag has estimated that regenerative agricultural practices can increase soil carbon sequestration by two to three tons of carbon per acre per year.[8] 

This service now has a partial market. The voluntary soil carbon credit market reached an estimated $425 to $530 million in 2025 and is projected to grow to $1.2 billion by 2030.[9] Premium soil carbon credits from well-documented, high-quality projects command $25 to $50 per credit. The mechanics of accessing these markets can be complex, and many are currently better suited to larger operations; minimum acreage requirements and verification costs create barriers for small farms that are still being addressed. But the principle is established: the carbon that a regenerative neighborhood farm sequesters in its soil has economic value, and mechanisms for capturing that value are developing.

Biodiversity: The Service Science Is Still Learning to Price
A community farm growing 40 to 50 varieties of vegetables, herbs, fruits, and edible flowers, rotating through seasons, maintaining heirloom varieties, supporting companion plants and pollinator flora, is a biodiversity asset in a landscape that, in most American cities, has been dramatically simplified. Urban monoculture, lawns, ornamental plantings of a handful of species, impervious surfaces, provides almost none of the ecological function that diverse, productive vegetation does. A neighborhood farm is a living library of genetic and species diversity, an ecological corridor that connects fragmented urban habitat, and a seed bank embedded in the community. 

The economic value of biodiversity is among the most difficult of all ecosystem services to quantify, and among the most important. Biodiversity underpins the resilience of every other ecosystem service: diverse plant communities support diverse pollinator communities, which support crop production, which supports human nutrition, which supports human health. The collapse of biodiversity at any point in this chain degrades all the services downstream. Neighborhood farms are among the most biodiverse sites in most urban landscapes, and they maintain that diversity year after year through the ongoing work of farmers who care about what they grow.

“The services that small farms provide to their communities, such as stormwater absorption, heat mitigation, pollinator habitat, carbon sequestration, and biodiversity are real, measurable, and economically significant. They just aren’t on the invoice.”

The Emerging Architecture of Payment

The idea that farmers should be compensated for the ecosystem services they provide alongside food production is not new. This principle, known as payments for ecosystem services, or PES, has been discussed in agricultural economics for decades. What is relatively new is the infrastructure for making such payments at meaningful scale.

Conservation programs through the USDA’s Natural Resources Conservation Service (NRCS), including EQIP and CSP discussed in our Farm Bill article this month, already function as partial ecosystem service payments: they compensate farmers for implementing practices; cover crops, composting systems, pollinator habitat, water management, whose primary benefit is ecological rather than productive. These programs are the most accessible existing pathway for neighborhood farms to receive some compensation for ecosystem services.

The voluntary carbon market represents an emerging additional pathway. The Growing Climate Solutions Act of 2022 directed USDA to create a framework for connecting farmers to verified carbon markets, and USDA published its intent to establish the program in early 2024.[10] Premium soil carbon credits now command $25 to $50 per ton from buyers seeking high-quality, verified sequestration.

Water quality trading programs, which allow farms that reduce nutrient and sediment runoff beyond regulatory requirements to sell those reductions as credits to other polluters, exist in several states and are expanding. Tompkins County, New York, has established a pioneering farmland stewardship payment program that compensates farmers specifically for practices that improve water quality, with over 28,000 acres enrolled as of 2024, backed by USDA RCPP funding.[11]

These mechanisms are imperfect and unevenly accessible. Many carbon markets still favor large-scale operations through minimum acreage requirements. The transaction costs of entering ecosystem service markets can be prohibitive for a two-acre urban farm. Measurement and verification of ecosystem service delivery at small scale remains a technical and administrative challenge. But the
direction is clear: the world is slowly building the infrastructure to recognize and compensate the public goods that farms provide. Neighborhood farms are positioned to benefit from this architecture as it matures, and their community relationships and regenerative practices make them among the strongest candidates for future ecosystem service payment programs.

Why This Is a Public Benefit and Should Be Treated as One

A city that builds a detention basin to manage stormwater considers that investment public infrastructure. A city that plants trees for urban cooling considers that investment public infrastructure. A city that maintains parks for the mental health and social wellbeing of its residents considers that investment public infrastructure. All of these are ecosystem services that vegetated land provides, and
all of them are funded, at least in part, by public money.

A neighborhood farm provides all of these services simultaneously, in a package that also grows food, creates employment, educates children, builds community cohesion, and keeps money circulating in the local economy. It does all of this on land that, without the farm, would likely be providing none of these services, sitting as a vacant lot, a parking surface, or a building that generates none of the ecological function the farm does. The farm is, in every meaningful sense, public infrastructure. The fact that it is privately operated should not obscure the public goods it generates, any more than a privately operated utility is not considered infrastructure because it is not government-owned. 

This is the argument that the ecosystem services framework makes, in economic terms: the public goods generated by neighborhood farms are real enough to measure, significant enough to matter, and currently uncompensated in ways that make farm viability harder than it needs to be. A food system that recognizes and compensates these services, through conservation payments, ecosystem service markets, municipal green infrastructure programs, or direct public investment in community farmland access, would be a food system that prices food more honestly, pays farmers more fairly, and builds the ecological infrastructure that cities increasingly need.

At Neighborhood Farms USA, this understanding shapes how we think about the farms in our network. When we support a farm’s soil-building investment through the Growing Impact Fund, we are not just supporting food production. We are investing in a stormwater system that doesn’t need pipes, a cooling system that doesn’t need electricity, a pollinator corridor that doesn’t need engineering, and a carbon sink that doesn’t need machinery. The invoice for these services, which the farm never sends, is part of what makes neighborhood farms one of the most cost-effective public investments a community can make. We think it is worth making that case, clearly and with the numbers behind it, until the systems that govern how land is valued and how farmers are compensated begin to reflect it.