Is tap water safe to drink?

ole_man said:I know there was a similar thread about a year ago, but I don't really care what anyone thinks about the taste. My question is whether tap water is actually safe to drink—specifically in Washington, D.C.
I drink a ton of water, and if I bought bottled water every single day, it would be incredibly expensive
(we all know how much students struggle financially 😬 )

So, if anyone is well-informed about the water quality in the city, please enlighten me...
Basically, can I drink from the D.C. water supply without worrying about needing to browse Craigslist for new kidneys...

😁
I had this exact same worry about a year ago (I didn't think to check the forums 😁 ), once I started getting these paranoid ideas about kidney stones c-c-c... after I saw pieces in my dishwasher filter that were sharp as razor blades. I started buying bottled water, but it hit my wallet too hard, so that didn't last long.
Back then, I was living in NYC.
And I could definitely detect a weird smell in the water, almost like I was boiling cloves, and it would turn yellow... gross. Not to mention those white deposits that were constantly building up around the sink and the faucets 😠

Anyway, I've heard plenty of times that the water is fine to drink, but what does their official talk matter when it has a metallic taste...

x-type said:The water in Washington, D.C. has so much limescale. I remember living in NYC and our sink would always have those annoying spots no matter how much we scrubbed. Here in Brooklyn, I don't deal with the buildup, but the tap water gets this terrible taste if it sits out for even a little while. Does anyone know why that happens?

Yeah, same goes for the stuff we get in San Francisco (at least the batch we’re getting now). I tried telling my family about it once, but they just gave me this blank stare.
Sometimes it doesn't even need to sit long—just an hour or two—before the taste turns really weird. Gross.

Nicole James said:Lead pipes are totally harmless... they get coated in limescale so fast that the metal doesn't even touch the water.

If memory serves, water lines aren't lead—they're galvanized steel. And the main lines? Those are plastic. Honestly, stop worrying about lead. The Romans were the ones using lead pipes, but we haven't been doing that for ages. Nowadays, you'd only see something like that in old sewer systems. 👍

Brandon Thomas89 said:As far as I can recall, water pipes aren't actually made of lead; they're galvanized steel. The main lines are usually plastic anyway. So, there’s really nothing to worry about regarding lead exposure. The Romans were the ones using lead pipes, but that hasn't been standard practice for ages. Nowadays, lead is mostly relegated to sewage systems. 👍

Ah, is that so?

Because, as far as my own eyes can tell, those water pipes are definitely lead.

Trust me, I know, because I have them sitting right here in my own house.

Yet, I keep getting lectured by people insisting they aren't dangerous, claiming some sort of non-toxic oxide layer forms on the inside to protect us.
The Romans, however, certainly had their hands full with lead issues, though it was more likely from the lead-based glazes they used on their dinnerware.

fadedtrucker19 said:Got it.

I’m staring at these lead water pipes.

I know the deal—I’ve got them in my own house.

But people keep trying to convince me they aren't a big deal because an oxide layer builds up inside and makes them non-toxic.
The ancient Romans had their issues with lead because they used lead-based glazes on their dishes.

My place is relatively modern, so everything is zinc-coated. 👍
Lead is just for the sewage lines here. The main water lines are all plastic.
Basically, I don't think there's much to worry about.

Amanda Stewart69 said:Sure, but I don't think that's actually a common occurrence.

Why don't you come over to my place then? I live in one of those massive high-rises in the outskirts of D.C. along with 700 other people. It's the exact same story at my friend's place in Brooklyn—wherever there are old lead pipes, you'll find this problem.

Nicole James said:Lead pipes are totally safe... they get coated in limescale so quickly that the metal doesn't even touch the water.

Give that statement some actual thought for once. Limescale dissolves in water, which means if a chunk of it flakes off, it’s taking surface lead right along with it. Look, if someone wants to play Russian roulette with their health, be my guest. My mom ended up seriously ill, so frankly, I don't give a damn about anything else right now.

Brandon Thomas89 said:As far as I can recall, water pipes aren't made of lead; they're galvanized steel. Plus, the main lines are plastic. You really have nothing to worry about when it comes to lead. Only the ancient Romans used lead piping, and that hasn't been a thing for ages. Nowadays, you'd only see something like that being used for sewage. 👍

The Romans built their infrastructure using stone channels that lasted for centuries. Fast forward to modern construction, and we’ve swapped durability for convenience, relying almost entirely on galvanized steel and plastic piping. Even if you look at older buildings—we're talking structures built back in the 1970s—you’ll often find lead pipes still tucked away in the walls.

Angela Wright said:Come visit me! I live in a massive apartment complex in Washington, D.C. with 700 other people. It’s the same situation at my friend's place in Brooklyn—everywhere there are lead pipes...

That is possible. However, I have yet to see red scale, even in the oldest buildings, let alone the newer ones like mine.

In Washington, D.C., we get water from two different sources, and the word on the street is that the Rocky Mountain supply is significantly better than what they serve over in the suburbs.

Buying those little plastic bottles is pure stupidity. But hey, when we have money to burn, we'll keep buying them.
We have perfectly good tap water right here, yet we act like fools by paying for bottled stuff!

Even the one straight from the factory isn't the same as a flashed one.

Boil five liters of water and see how much residue you're left with; the more, the better.
I'm from San Diego and I get a ton of buildup here, probably around 8 or 9 grams. I used to boil my water all the time, but I can't be bothered anymore. Now I just drink straight from the tap until the scale gets heavy enough to weigh... 🙂

Angela Wright said:The tap water provided by our local utility is actually quite high quality, or at least that's what the officials claim when they say the composition matches premium bottled brands. On the other hand, I personally feel like there is an excessive amount of chlorine in it, which becomes most noticeable if you let a glass sit for about 15 or 20 minutes; I just don't find the taste pleasant. What further compromises the quality are those aging lead pipes. You can really spot the lead in the bathtub because where scale builds up, it leaves this reddish tint. As far as I know, a Brita filter only filters and softens the water. They always say that water with more minerals is better.
Personally, I stick to bottled water whenever I am in NYC, but once I am back in Miami, I just drink from the tap. I truly believe Miami water is some of the best quality you can find in America.

Does the old lead piping really matter, though, since wouldn't the elderly have been dying off en masse from poisoning by now? Isn't it true that as soon as water flows through a pipe, a layer of limescale forms on the inner walls that prevents toxins from leaching out? That is what my teacher taught me. If you know Harrington, he says that is the absolute truth.

In much wealthier countries compared to ours, they don't just dump chlorine into the drinking water; instead, they treat it with ozone, which costs way more than standard chlorination. What do you guys think the reasoning is behind that?

Should we go with something fancy and high-end?

Matthew Hall37 said:In wealthier countries compared to ours, they don't just dump chlorine in the water; they treat it with ozone instead since it costs more. Why do you think that is?

not really sure what you're getting at here😕
if you're trying to say chlorine is toxic, go ahead and take a deep breath of pure ozone and let's see how much longer you last...

So, I finally picked up one of those water purification systems from General Electric over in Cleveland. It’s actually a pretty cool setup—it has a tank that holds about 10 liters. The whole thing runs on reverse osmosis, but there's this extra feature where the water passes through an illuminated chamber that uses UV light for an extra layer of cleaning. Honestly, the water tastes way cleaner and smoother now, almost like those premium bottled brands you buy at the store. Does anyone else here have a setup like this? What are your thoughts so far??

Can we start with the basics? Basically, all drinking water has to be disinfected to keep nasty infections at bay. When it comes to wastewater, there are three main ways to get the job done: chlorination, ozonation, and UV radiation.
A ton of municipal systems across the US rely on chlorination for both drinking and wastewater. But here’s the thing most people don't realize: those organic chlorine chemicals used in the process can actually mess with public health, wreck aquatic life, and just hang around the environment way longer than they should. Because engineers have to balance the need for effective disinfection against the environmental fallout, a lot of water utilities are ditching chlorine for other methods.

Ozonation and UV radiation are two great alternatives because they don't leave any chemical residue behind in the treated water. Ozonation systems have been used for drinking water since the early 1900s, but back in the 1970s, designers here in the US started looking into using ozone for wastewater disinfection too.

To make ozone, these systems use electrical discharge—it’s actually pretty similar to how lightning works during a thunderstorm. Once you've got the ozone, you mix it into the drinking or wastewater to hit that sweet spot of disinfection. As for UV radiation, it works by hitting the wastewater with UV rays that trigger photochemical changes inside the cells of pathogens, basically neutralizing them.

The way UV disinfection works is actually functionally different from chlorination or ozonation. Instead of physically destroying the pathogens, UV radiation just breaks them so badly they lose their ability to reproduce. It's essentially like taking a natural UV process and cranking it up to eleven by concentrating the light intensely.

Generally speaking, UV systems are cheaper to build and run compared to ozonation. While the labor, maintenance, and energy costs for both UV and ozone depend heavily on the water quality you're dealing with, when you crunch the final numbers, UV disinfection usually comes out on top... "
Make sense?

Matthew Hall37 said:Get it?

nah. you still haven't explained why ozone is less toxic than chlorine...

Speaking of America... I wouldn't recommend drinking the tap water there if I were you. 👍
I was watching this documentary recently about how factories just dump their industrial waste directly into the local water supply because it's a cheaper way to handle disposal 😁. It’s definitely not the healthiest habit.