NASA’s NISAR satellite reveals that Mexico City is sinking at an alarming rate, with some areas subsiding nearly 10 inches a year due to excessive groundwater extraction. This issue affects the daily lives of over 22 million residents who rely on the ancient aquifer beneath the city for approximately 60% of their drinking water.
The facts are staggering. Mexico City experiences subsidence rates exceeding 0.5 inches per month—some areas even sink by about 0.8 inches monthly. This translates to more than 9.5 inches annually in the worst-hit regions, particularly near Benito Juarez International Airport. The Angel of Independence monument has already required 14 additional steps at its base because of the shifting ground.
But how did we reach this critical point? The roots of this crisis stretch back to the city’s foundation on the former lakebed of Lake Texcoco, which has clay-rich soil prone to compaction when water is extracted. Since the 1920s, studies have documented this subsidence problem, yet relentless urban development has intensified the situation. As the population grows, so does the demand for water, leading to unsustainable groundwater extraction.
The consequences are severe and multifaceted. Infrastructure damage is rampant—fractured roads and tilted buildings abound across the city. The ground beneath Mexico City is compressing and collapsing due to excessive water use, making recovery nearly impossible. Once the ground compresses, it cannot regain its original elevation even if water levels are restored.
Experts like David Bekaert highlight that images from NISAR are just the beginning of understanding this phenomenon: “Mexico City is a well-known hot spot when it comes to subsidence.” With urban growth continuing unabated, what remains uncertain is how city planners will address these challenges while ensuring adequate water supply.
As we look forward, no clear timeline has been shared regarding potential solutions or interventions aimed at mitigating this crisis. The interplay between urban development and aquifer depletion will be crucial in determining Mexico City’s future resilience against subsidence.
