It’s not the water itself that’s the problem—it’s the pipes it travels through. Homes built before 1986 are the prime suspects, especially those with copper pipes soldered with lead-based materials. The Environmental Protection Agency (EPA) estimates that up to 10 million American homes still have lead service lines running from the main to the kitchen sink.
Corrosion is the sneaky accomplice. When water sits in those pipes for hours—say, overnight or while you’re at work—the lead slowly dissolves into it. That’s why the first flush of water in the morning can have the highest concentration. It’s like the coffee left in the pot from yesterday; you wouldn’t drink that, so why risk the metal soup?
City water systems do treat water with anti-corrosion agents, like orthophosphate, which coats pipes to prevent leaching. But infrastructure ages, budgets get cut, and sometimes those treatments fail. Think of it as a band-aid on a leaky boat—it works until it doesn’t.
Lead In Water
