Here’s something most people never think about: the water coming out of your faucet right now might have a small amount of lead in it, and that’s technically allowed by law.
The EPA sets legal limits on over 90 contaminants in drinking water — including lead. Those limits are set based on what’s considered safe AND what water systems can realistically achieve. That second part matters. It means the goal isn’t zero contamination. It’s keeping it low enough to be considered acceptable.
So where does lead even come from if it’s regulated? Usually not the water treatment plant itself — the problem is often the pipes. Older homes, older buildings, older plumbing. Lead can leach into water as it sits in pipes between the treatment facility and your glass. The water leaves the plant fine. The journey to your tap is where things can change.
Here’s the fix, and it’s almost embarrassingly simple: run your cold water faucet for at least 30 seconds before you drink it or use it to cook. That flushes out the water that’s been sitting in the pipes — the stuff most likely to have picked up anything from old plumbing. Fresh water from further back in the system comes through. Problem significantly reduced. (In larger buildings or homes with longer pipe runs, flushing for a full minute or two may be even more effective.)
A few other things worth knowing:
Always use cold water for drinking and cooking. Hot water dissolves contaminants from pipes faster, so it can carry higher levels of whatever’s in there.
If you live in an older building — especially anything built before the late 1980s — this matters more for you. Lead pipes and lead solder were common in construction for a long time. You’re more likely to have older plumbing than someone in a newer development.
The CDC notes that water quality standards limit the levels of more than 90 contaminants in tap water — harmful germs, chemicals, metals. These standards exist and utilities are required to follow them. That’s real protection. But “regulated” and “zero” aren’t the same thing, and knowing that helps you make smarter choices.
Running the tap for 30 seconds costs you nothing. It takes almost no effort. And it’s one of those small habits that’s just quietly good for you.