Testing by the Flatwater Free Press and ProPublica found that 208 of 388 homes sampled in a designated Superfund zone surrounding a former lead smelter in East Omaha contained soil contamination levels exceeding what modern health research considers safe for children. The investigation tested properties within the federally-designated cleanup area where remediation efforts have been ongoing since the late 1990s.

The EPA's current cleanup standard for the Omaha site directs contractors to excavate and replace yards only when lead concentrations exceed 400 parts per million. However, an agency risk model found that protecting most children according to updated health guidelines would require soil levels below 100 parts per million. The federal threshold was set in 2009 based on health recommendations from 1994.

Natalie Thorpe, a history and English teacher in Omaha, learned her 3-year-old daughter tested high for lead as an infant after the family purchased a home near the Superfund site. While Thorpe's yard contains enough lead to present potential risk, it does not meet the threshold for government-funded remediation under current standards. "It feels a little bit like being a sitting duck," Thorpe said.

The contamination affects diverse neighborhoods across the city's older urban core, including historically Black communities north of downtown and predominantly Hispanic areas to the south. Homes closest to former industrial sites showed slightly higher concentrations but elevated lead levels appeared consistently across income brackets and racial demographics within the designated zone.

What the Left Is Saying

Environmental health advocates argue that outdated federal standards leave children vulnerable to preventable harm in communities already burdened by historical pollution. Tom Neltner, who leads the nonprofit Unleaded Kids focused on lead poisoning prevention, said work on lead historically centered on extreme poisonings from paint and that new research demands closer attention to soil contamination.

Progressive lawmakers have pushed for stronger EPA enforcement at existing Superfund sites. Senator Jeff Merkley of Oregon, a frequent critic of EPA remediation policies, has argued that communities near legacy industrial pollution deserve cleanup standards reflecting current science rather than decades-old benchmarks. Environmental justice advocates note the Omaha findings disproportionately affect neighborhoods with higher percentages of minority residents who faced limited ability to relocate away from industrial hazards during the era when smelting operations were active.

Democrats have increasingly framed lead remediation as a public health equity issue, pointing to disparities in childhood blood-lead rates between children in Superfund-adjacent neighborhoods and national averages. Representative Rashida Tlaib of Michigan has introduced legislation calling for federal funding to cover full remediation costs at qualifying sites regardless of property value thresholds.

What the Right Is Saying

Fiscal conservatives have questioned whether universal cleanup to 100 parts per million is achievable given the scope of contamination across American communities. A 2024 study by leading soil contamination researchers estimated that remediating all U.S. homes exceeding that threshold could cost between $500 billion and $1.4 trillion, a figure representing a substantial portion of annual federal discretionary spending.

EPA spokesperson Kellen Ashford said no level of lead in the body is safe but removing all lead from contaminated sites would be impossible. He pointed to other protective measures including the Omaha Lead Registry website where residents can check property-specific data and the Douglas County Health Department's poisoning prevention program that conducts home visits when children test positive for exposure.

Some Republican lawmakers have emphasized the importance of giving local communities flexibility in remediation approaches rather than imposing uniform national standards that may not account for regional differences in geology, housing stock or existing infrastructure. Senator Kevin Cramer of North Dakota has advocated for state-federal partnerships that allow faster cleanup timelines through streamlined contracting processes.

Industry groups including the National Association of Manufacturers have argued that retroactively applying stricter soil standards to sites already under remediation could discourage economic development and property investment in affected neighborhoods without meaningfully improving public health outcomes.

What the Numbers Show

The Flatwater Free Press and ProPublica tested 388 homes within the Omaha Superfund site. Of those, 208 properties contained lead concentrations exceeding 100 parts per million, representing approximately 54 percent of sampled residences. The EPA's current action threshold sits at 400 ppm, meaning more than half the homes exceed health-based recommendations while remaining below federally-triggered cleanup levels.

The CDC has lowered its definition of elevated blood-lead levels in children twice over the past 15 years as research documented harm occurring at lower exposures than previously understood. Studies now link even moderate lead exposure to IQ reduction in children and increased cardiovascular risk in adults.

Nationally, approximately 40 percent of U.S. homes exceed 100 ppm lead concentrations according to a 2024 peer-reviewed analysis. While the percentage of Omaha children testing positive for elevated blood-lead has declined significantly over the past two decades—mirroring national trends—children within the Superfund zone continue to test high at rates exceeding the national average.

The EPA lowered its recommended screening level to as little as 100 ppm in 2024 under the Biden administration. However, that recommendation applies to initial site assessment rather than mandatory cleanup triggers, leaving existing remediation standards unchanged for sites already designated under prior guidelines.

The Bottom Line

The Omaha findings illustrate a gap between scientific understanding of lead harm and federal regulatory action at contaminated sites nationwide. While blood-lead levels have declined substantially since the 1990s, children in legacy pollution zones continue to face elevated exposure risks that advocates argue are preventable under existing technology.

The EPA has indicated it will assess whether current cleanup standards require updating as part of its five-year review process for Superfund sites. Environmental health researchers are calling for expanded testing programs and clearer public communication about contamination levels at individual properties, particularly for families with young children or pregnant women.

What remains unresolved is whether Congress would appropriate funding necessary to meet stricter remediation thresholds if the EPA were to adopt them, and how regulators would balance comprehensive cleanup against program costs that could reach into the hundreds of billions of dollars nationally.