In Eastern North Carolina, Community Science Aims to Fill an Air Quality Gap

Last January, Daisha Wall and CleanAIRE NC held a community meeting with residents in Sampson County, North Carolina. The meeting was to explain a new initiative where residents can deploy air sensors to collect data on the air quality.

Confined animal feeding operations (CAFOs) of swine impact the air in Sampson County. Not only is the smell overwhelming, but the odor is an indicator of what these facilities are emitting—dangerous substances such as ammonia and hydrogen sulfide. CAFOs are densely populated in communities of color in eastern North Carolina, and the pollution and impact of them has been on the books for decades. The issue, and the environmental justice advocates in the community who have spoken out against it, are well documented in the film “The Smell of Money.” 

The EPA has air sensors deployed around the country to monitor air quality. When there’s documented pollution, it can enable the government to hold polluters accountable. But rural areas can get overlooked when it comes to air quality measurements—in Sampson County there is a gap in data collection. One of the aims of this project is to make the case for a federal air monitor in the county. 

“One of the end goals is to advocate for a federal air monitor within the county,” says Wall, Community Science Manager for CleanAIRE NC. “And that’s actually something that we’ve been able to do in the past.”

CAFOs and Air Pollution

On a broad scale, very large-scale industrial livestock operations (with tens of thousands of animals) have been getting away with air pollution for a long time. 

“These facilities have not been required to report their air emissions for almost two decades,” says Carrie Apfel, deputy managing attorney for the Sustainable Food & Farming Program at Earthjustice. 

This exemption to the Clean Air Act can be traced back to a consent agreement made between the EPA and thousands of hog CAFOs in the early aughts. The EPA decided it needed to establish reporting methodologies for CAFOs in order to enforce emissions regulations—and so it traded legal immunity to some of the country’s biggest producers in exchange for a few years of data collection. Those few years came and went, producing very little useful data. Two decades later, CAFOs still get a free pass to pollute the air.

Meanwhile, a study from 2021 reports that agriculture leads to 17,900 air quality-related deaths every year in the US. This has been an urgent environmental justice issue for decades now, but the EPA is no closer to regulating air emissions from CAFOs.

Organizations such as Earthjustice have been working to hold the government accountable. It sued the EPA, challenging the reporting exemption for CAFOs under EPCRA as unlawful. This is one of the few statutes that would give the public the right to this reported information. Part of the resistance, says Apfel, has come from the idea that this will burden small farmers with having to figure out their emissions impact. But it won’t —this law would only affect the largest of operations, a small percentage overall.

“There’s a lot of mythology out there about where our food comes from and what these CAFOs are and are not, and I think that Big Ag does everything it can to keep it that way,” says Apfel. “I think that a lot of this is a narrative battle just trying to explain that these are not farms…They’re factories, and they don’t resemble anything like farms.”

While big wheels turn, Sampson County is taking action.

Community-driven data collection

CleanAire NC has seen success with its air quality work before, in Charlotte, NC.

Charlotte’s Historic West End endured redlining—the practice of banks refusing loans to communities of color. This contributed to multiple polluting industries moving into the area and impacting air quality. Residents wanted to know to what extent. So, community members approached CleanAIRE NC.

Residents and ClearnAIRE NC partnered to install PurpleAir sensors at peoples’ homes. The air sensors automatically track and record air quality, mainly through measuring particulate matter in the air. You can see the dashboard of operating air sensors here.

But measuring particulate matter presents a limited picture, and that’s where volunteer airkeepers come in. When levels get high, they can record their observations of what they see and smell and they can take pictures and videos. This will help the data set reflect the differences between highway emissions, CAFO pollution, rock dust from a quarry, and more.

“Particulate matter is so variable, and so it’s hard to pinpoint what might be going on at a specific time,” says Wall. 

Thanks to the data collected by these air sensors, Mecklenburg County Air Quality installed an air sensor. 

Community leaders and CleanAIRE NC have partnered on other efforts to create a green district in the Historic West End, such as planting trees, installing electric vehicle chargers, and supporting green infrastructure.

Now, 30 sensors have been deployed in Sampson County. Just as the work in Charlotte’s Historic West End has been driven by community questions, input, and resources so, too, will be the work in Sampson County.

“That’s a way that we’re trying to fill the gap between these researchers that are coming in to be a part of our project, and maintaining our values on engaging communities,” says Wall.

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