A newly released online tracker shows federal agencies modified or erased nearly 400 government datasets, leaving public health and scientific research in a tough spot.
Dozens of webpages have been removed from federal agency websites, cutting off public access to information about local health trends, chemical safety, and other important public health topics.
A new monitoring tool from dataindex.us shows that at least 28 federal datasets were wiped completely, while another 338 were modified. This isn’t just routine web maintenance; it’s a massive shift in how public information is handled.
What the Data Tracker Revealed
Public health datasets took the hardest hit, making up about 40% of all altered or deleted records across federal agencies.
Data policy experts and researchers created dataindex.us to log changes to public information across more than 60 government offices.
Of nearly 400 altered or removed files, health tools suffered the largest losses, with 158 affected datasets. Education records lost 24 datasets, while Veterans Affairs and immigration each lost 20 collections. The CDC alone saw 51 datasets modified or removed.
Why Health Monitoring Is Taking the Biggest Hit
Critical surveillance tools tracking drug overdoses, disease outbreaks, and maternal health have been quieted or stripped of key details.
Take the Drug Abuse Warning Network (DAWN), which tracks drug-related emergency room visits in near-real-time. That system stopped updating entirely, leaving doctors and local health officials without early warnings during overdose spikes.
At the CDC, systems like the National HIV Surveillance System and the Emerging Infections Program removed gender identity reporting options. Former U.S. chief data scientist Denice Ross warned that “we are facing a future where we are not going to have the information that we need to make decisions that will save lives.“
Meanwhile, the Pregnancy Risk Assessment Monitoring System stopped publishing standardized national reports, leaving individual states to fund their own tracking.
Environmental Safety and Science Under Pressure
Public web tools that mapped neighborhood chemical hazards and climate disasters are disappearing from agency sites.
Environmental transparency is taking a major hit, too. The EPA took down its Risk Management Program lookup tool, which let everyday people search their zip code for nearby toxic chemical facilities.
Now, people must travel to physical EPA reading rooms just to inspect paper documents. Nalleli Hidalgo, a community organizer in Houston, said removing the tool stripped away “another layer of protection for environmental justice communities.“
Meanwhile, NOAA saw 12 datasets impacted, including key collections tracking billion-dollar climate disasters. A report by the Environmental Data & Governance Initiative (EDGI) found 70% more website changes in early 2025 than in a similar timeframe in 2017.
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Staffing Cuts and Legal Pushback
Massive staffing cuts have weakened federal statistical agencies while medical groups fight back in court.
Missing web pages are only half the story, as major job cuts leave fewer workers to handle the numbers. Steve Pierson of the American Statistical Association estimated that efficiency initiatives triggered 15% to 40% staff attrition at key statistical agencies.
A separate report from the Union of Concerned Scientists tracked over 400 attacks on federal science in just six months. Lead author Darya Minovi warned that these actions represent “a deliberate plan to dismantle federal science capacity.“
However, public pressure and lawsuits are forcing some data back online. A lawsuit by nine healthcare groups recently pushed federal officials into a settlement to restore scores of health agency web pages.
The Big Picture for American Communities
Losing decades of baseline information makes it much harder for local communities to fix public health and safety problems.
When taxpayer-funded data vanishes, local leaders lose the ability to see what policies are actually working. Gaps in baseline data complicate disease modeling and hamper scientific research for years.
Without accurate numbers, public health departments and emergency teams must make big decisions in the dark. Ultimately, missing data makes solving real-world problems much harder for everyone.
How do you think losing access to public health and environmental data might impact your own community’s safety and well-being?
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