From Big Marsh to Block-Level Data: What Civic and Environmental Technology Looks Like in Chicago

There is a park on Chicago's Southeast Side that most of the city has never visited.

Big Marsh sits in the Calumet Industrial Corridor — roughly 400 acres of restored wetland and native prairie carved out of what was once one of the most heavily industrialized stretches of the Midwest. It has mountain bike trails now. Migratory birds stop there. On the right morning in October, you can stand at the water's edge and watch a great blue heron work the shallows while, a few miles north, the skyline does what it always does.

The Calumet region — Big Marsh, Lake Calumet, the Calumet River system, the neighborhoods that surround it — is one of the most ecologically complex and historically burdened places in Illinois. It is also one of the most under-resourced when it comes to accessible, community-facing environmental data.

That tension is exactly where EngineerChi is starting to work.

Why Civic and Environmental Technology

EngineerChi has always been a software company first. Web applications, databases, APIs, mobile apps — that is what we do, and we are good at it. But for the last several years, we have been watching a pattern across the community organizations and neighborhood groups we work with: they have real environmental concerns, and very little technical infrastructure to track, visualize, or communicate what they are actually experiencing on the ground.

Flooding that does not show up in city models. Air quality that residents have been reporting for years without data to back them up. Green space that was restored but not monitored. Environmental justice work that runs on spreadsheets, PDF reports, and grant applications that take months to produce.

We are not environmental scientists. We are engineers. But engineers build infrastructure, and right now there is a gap between the environmental data that exists — collected by sensors, satellites, city agencies, and research institutions — and the community members who live inside that data every day.

Our emerging work in civic and environmental technology is an attempt to close that gap, starting locally.

The Calumet Region as a Starting Point

The Southeast Side of Chicago is a useful place to begin thinking about this problem, not because it is unique, but because it is specific.

The Calumet region has a documented history of industrial pollution, disinvestment, and environmental justice organizing that goes back decades. It is also a region with ongoing ecological restoration efforts — Big Marsh, the Lake Calumet Cluster, the Eggers Grove area, the work being done by the Southeast Environmental Task Force and Chicago Wilderness and the Illinois Nature Preserves Commission — that represent real, sustained investment in the land.

What does that restoration look like in practice? Wetland reconstruction. Native species reintroduction. Water quality monitoring at key points along the Calumet River. Flood risk modeling along low-lying residential streets. Bird surveys. Soil testing.

Most of that data exists somewhere. Very little of it is publicly accessible in a form that a resident, a parent, a block club president, or a school teacher can actually use.

This is where technology has something to offer — not as a replacement for the organizing work that community groups are already doing, but as infrastructure that makes that work more legible, more credible, and more effective.

What the Technology Actually Looks Like

We are being deliberate about what we mean when we say we are building civic and environmental technology. These are not finished products. They are emerging capabilities — things we are actively prototyping, researching, and building toward in collaboration with communities and partners.

Here is what that looks like concretely:

Environmental Data Dashboards

A web dashboard that pulls from publicly available data sources — air quality monitoring stations, water level gauges, flood prediction models, green space surveys — and presents that information in a format that a resident can read and a community organization can use in a meeting. Not a research interface. A community interface.

For the Calumet region specifically, there is publicly available data from USGS stream gauges on the Calumet River, EPA air quality monitoring, and Chicago's own open data portal. The data exists. The presentation layer — the thing that makes it readable and locally relevant — largely does not.

GIS and Interactive Mapping

Chicago's redlining maps are public record. The industrial permit history of every facility in the Calumet corridor is public record. Flood inundation models, green space access by census tract, tree canopy coverage, combined sewer overflow points — all of this is mappable.

What we are building toward is neighborhood-level spatial storytelling: maps that let a community see their environment in context, understand the history underneath it, and make the case to decision-makers with data behind them. Big Marsh and its surrounding neighborhoods are an obvious candidate for this kind of work — the ecological restoration that has happened there is significant and worth making visible.

Arduino and Low-Cost Sensor Networks

This is the most experimental piece of what we are doing, and we want to be honest about that. We are not operating a sensor network. We are building the capability to prototype one.

Arduino-based sensors can measure air quality, temperature, humidity, and basic water chemistry at a cost that is accessible to community organizations and small nonprofits. The Calumet River system, the wetlands at Big Marsh, the residential streets in South Chicago and Hegewisch that flood after heavy rain — these are places where low-cost environmental monitoring could produce data that currently does not exist at the community level.

A sensor costs less than a hundred dollars. The infrastructure to collect, store, and display what it measures is a software problem. Software is what we build.

Connecting to the Work That Already Exists

We want to be direct about something: we are not arriving in the Calumet region with solutions. There is a long, serious tradition of environmental justice organizing on the Southeast Side of Chicago — work done by residents, community scientists, nonprofit organizations, and researchers who have been at this for decades.

Our role, if we have one, is to be a technical partner to that work. To help community organizations build the data infrastructure they need to do what they are already trying to do. To make environmental information more accessible to the people who live inside it.

That means sitting down with the groups already working in these neighborhoods and asking what they actually need — not showing up with a product and assuming the need fits.

If you are working on environmental monitoring, green space equity, flood resilience, or related civic infrastructure in the Calumet region or anywhere else on Chicago's South and West Sides, we want to talk to you.

What We Are Building Toward

The long-term vision here is not complicated. It is just ambitious.

We want to help build a network of community-accessible environmental monitoring tools across Chicago's disinvested neighborhoods — the kinds of places where environmental burden is highest and environmental data infrastructure is most absent.

We want the resident in South Chicago who has been complaining about air quality for years to have a dashboard they can point to. We want the community organization fighting a rezoning decision to have a map that shows what their neighborhood looks like relative to every toxic facility within three miles. We want the flood-prone block in Hegewisch to have water level data they can use to make the case for infrastructure investment.

This is civic technology in the most direct sense: technology that strengthens communities' ability to understand their environment and advocate for themselves within it.

We are early in this work. The prototypes are not finished. The partnerships are forming. But the direction is clear, and the need is real.

If you want to follow this work or get involved — as a community partner, a collaborator, or just someone who wants to know more — reach out. This is exactly the kind of project that gets better with more people in the room.

— Chuy Medina, EngineerChi
Chicago, IL