Why are suburban yards so big?, Stewart Hicks asks:
It’s not just because Americans wanted more space, systems underground required it.
After World War II, developers began building suburbs at a scale and speed the country had never seen before. But instead of connecting every new house to municipal sewer systems, many developments relied on rural technologies: private wells, septic tanks, and drain fields. That decision helped shape the familiar postwar suburb with curving streets, the square-ish lots and wide lawns.
In this video, I look at how septic systems influenced the physical layout of American suburbia, from Levittown to FHA mortgage standards, and why the rules meant to keep drinking water separate from sewage helped produce the half-acre lot as a suburban ideal. I also look at what went wrong: collapsed drain pipes, overloaded systems, contaminated aquifers, expensive sewer retrofits, and even neighborhoods where septic saturation helped destabilize the ground itself.