The Trump administration has embarked on an aggressive campaign to scrub or modify hundreds of federal datasets, removing critical information that does not align with current political priorities. According to a new tracker from dataindex.us, a watchdog group composed of data policy experts and researchers, at least 28 federal datasets have been completely deleted and another 338 have been altered over the last eighteen months. The purge spans more than 60 agencies, affecting everything from air quality monitors at US embassies to records of law enforcement officer misconduct and surveys on violence against children.
Public health appears to be the hardest hit sector, accounting for roughly 40 percent of the changes recorded by the watchdog group. Many of these modifications stem from an executive order aimed at restoring biological truth to the federal government, resulting in the removal of questions regarding gender identity from several major CDC surveys. This includes vital tools like the National HIV Surveillance System and studies focusing on PrEP uptake among gay men and communities of color. Even more alarming is the cessation of updates for systems like the Drug Abuse Warning Network, which physicians once relied upon to track emergency room visits and identify emerging overdose trends in real time.
Experts warn that these actions are effectively erasing the nations institutional memory. Thomas Babor, a professor emeritus specializing in public health and addiction at the University of Connecticut, noted that such data is essential for identifying which populations are most vulnerable to epidemics. Without this historical context and ongoing monitoring, he argues that officials cannot determine if a health crisis is improving or worsening, leaving American communities dangerously exposed.
Beyond healthcare, the deletions extend into labor and education sectors. Missing data now includes USDA surveys on farm worker wages—which helped set minimum pay rates for H-2A visa holders—and NCES reports on teacher salaries and working conditions. Because government agencies are not required to notify the public when data collection ends, many of these losses happened quietly behind the scenes through staff cuts or silent website removals. Denice Ross, a co-founder of dataindex.us and former US chief data scientist, warns that the country has reached a vulnerable tipping point where leaders may soon lack the basic evidence needed to make life saving decisions.
