Why does my bathroom always smell like a pool?

I’ve heard some cleaning products can leave a chlorine-like scent too...

You’re not wrong - some bathroom cleaners are loaded with bleach or similar chemicals, and they can definitely mimic that pool smell. Still, I’d always check the traps first before blaming the cleaners. It’s easy to overlook, but a dry trap is a safety issue too - sewer gases aren’t something you want lingering around. Even if it’s “just” a smell, I’d rather be safe than sorry.

I get what you’re saying about the traps - definitely not something I’d want to ignore, especially if there’s even a chance of sewer gas sneaking in. But here’s where I get a bit skeptical: is it really that common for traps to dry out unless the bathroom’s barely used? In my place, the only time I’ve had a dry trap was when we went on vacation for a couple weeks and nobody touched the guest bath. Otherwise, with regular use, isn’t it more likely that cleaning products are just too strong or maybe not getting rinsed away fully?

I’m all for being cautious, but before calling in a plumber or tearing into pipes, I’d probably look at what’s under the sink and around the toilet. Sometimes those cheap air fresheners or even certain soaps can leave behind weird chemical smells that stick around longer than you’d expect. Had a bottle of “ocean breeze” cleaner once - smelled more like public pool than anything else.

Also, has anyone checked if there’s any leftover water sitting somewhere? Like in the mop bucket or behind the toilet tank? Sometimes stagnant water can pick up odd odors, especially if there’s any bleach residue mixed in.

Not saying don’t check the traps - just wondering if it’s worth looking at some of these other culprits first before assuming it’s a plumbing issue. Feels like half the time I try to fix something major, it ends up being something simple (and way cheaper) that I missed at first glance...

You’re definitely not alone in thinking it’s usually something simple before it’s a big plumbing issue. I can’t count the number of times I’ve been called out for a “mystery odor” and it turned out to be a forgotten mop bucket or some old cleaner leaking behind the toilet. That “public pool” smell you mentioned? Nine times out of ten, it’s a cleaning product with a little too much chlorine or ammonia in it, especially if it didn’t get rinsed away properly. Those scents linger like you wouldn’t believe.

I hear you on the traps, too. In my experience, they only dry out if a bathroom’s been sitting unused for a while - like you said, vacation mode or maybe a basement guest bath nobody ever touches. Regular use usually keeps them topped up just fine. I’ve even seen folks pour a little mineral oil down the drain if they know a bathroom’s going to be out of commission for a while, just to slow down evaporation.

Funny thing is, the most persistent “pool” smell I ever chased down was from a cracked bottle of blue toilet cleaner wedged behind a stack of towels under the sink. The owner swore up and down it was a sewer problem, but nope - just a slow leak and a whole lot of chemical aroma. Sometimes it really is that simple.

I’d say your instincts are spot on. Before tearing into walls or calling in the cavalry, it’s worth sniffing around for those everyday culprits. Even air fresheners can mix with humidity and make things smell way stronger (and weirder) than intended. It’s easy to overlook the obvious when you’re worried about something big going wrong.

Trust your nose and your gut - most of the time, the solution’s hiding in plain sight.

Had a call not long ago where the homeowner was convinced they had a sewer backup just because the bathroom reeked of “pool.” I was skeptical, since the water was draining fine and there were no other signs. Turned out they’d switched to a new bleach-based toilet bowl tablet and didn’t realize how strong it got with the door closed and no fan running. People jump to worst-case scenarios, but honestly, if you’re using anything labeled “extra strength,” that’s usually your culprit. Not saying it’s never plumbing, but I’ve seen more false alarms than real disasters.

I’ve run into this more times than I’d like to admit. Folks get a whiff of that “pool” smell and immediately think something’s gone horribly wrong with the pipes. Nine times out of ten, it’s exactly what you described - someone’s using a heavy-duty cleaner or those blue tablets, and the ventilation’s not up to snuff. I always tell tenants to check for these things before calling in a plumber.

Here’s how I usually break it down when someone complains about a chlorine-like smell:

1. First, ask if they’ve changed cleaning products recently. Anything labeled “bleach,” “disinfectant,” or “extra strength” is a dead giveaway.
2. Next, check if the bathroom fan is working and actually being used. You’d be surprised how much of a difference that makes, especially in smaller bathrooms where the smell can really build up.
3. Look at the toilet tank - those tablets can be sneaky. Sometimes people forget they even put one in.
4. If nothing’s obvious, I’ll check for leaks or standing water just to rule out plumbing issues, but honestly, if everything’s draining fine and there’s no gurgling or backup, it’s almost never a sewer problem.

One thing I’m curious about - has anyone ever had a situation where it *was* plumbing and not just cleaning products? I’ve only seen it once, and that was because the wax ring under the toilet failed, but even then, it didn’t really smell like a pool... more like straight-up sewage. Maybe there are rare cases where chlorinated water from somewhere else gets into the system?

Anyway, I always recommend folks crack a window or run the fan after cleaning. Makes a world of difference and saves everyone a headache (literally and figuratively).