Can Drinking Bong Water Get You High?

Not even a little. What it will do is make you gag, and quite possibly send you running to the bathroom. So skip the swig, unless you’re thirsty for trouble.

Below, we break down why this myth refuses to die, what’s actually floating in that murky liquid, and what to do with old bong water instead of treating it like a science experiment gone wrong.

Bong water sits in the base or chamber of your bong, and its whole job is to filter and cool smoke before it hits your lungs. As the smoke bubbles through, particles like tar and ash get trapped in the water, which is what makes each hit smoother and easier on your throat. If you’ve ever wondered how much water to put in your bong, the answer ties directly into how well that filtering works.

After a session, that water turns into a murky soup of contaminants, including:

• Ash and tar residue from the burned cannabis
• Resin buildup from the smoke
• Mold, bacteria, and fungi that thrive in the warm, damp chamber
• Saliva

Leave it sitting for days and it becomes a genuine swamp: discolored, foul-smelling, and gross. Changing your bong water regularly is the easiest way to keep your hits clean, flavorful, and smooth.

Here’s the key part most people miss: even though bong water traps a small amount of plant material as it filters, the THC you’re after does not dissolve into it. Which brings us to the science.

The reason is simple chemistry: THC is not water-soluble.

THC is a fat-loving (hydrophobic, non-polar) molecule. Water is a polar solvent. Those two repel each other, like trying to mix oil and vinegar that never quite comes together. So even when smoke passes through your bong, the THC doesn’t dissolve and hang out in the water waiting to be sipped.

Three things make bong water a dead end for getting high:

1. THC won’t dissolve in water. It needs fat or alcohol to break down and become usable, which is exactly why edibles are made with cannabutter and why THC tinctures use alcohol or oil as a base, not plain water.
2. Most THC is absorbed in seconds. When you inhale, the active cannabinoids hit your lungs almost instantly. Very little is left behind in the water to begin with.
3. Whatever’s left is bound up. The trace cannabinoids that do get trapped cling to resin and burnt particulates, which makes them non-bioavailable. Your body can’t actually use them.

Pro tip: If you want THC in something drinkable, infuse it properly with a fat or alcohol base. Dirty bong water is the one cannabis liquid guaranteed to do nothing but ruin your day.

The idea sticks around for one reason: bong water looks potent. It’s brown, it smells like a session, and it’s been sitting right where all that smoke passed through, so it seems logical that it must hold something worth drinking.

It doesn’t. The color and smell come from tar, ash, and resin, which are the parts of smoke you specifically don’t want in your body, not concentrated THC. The myth survives on appearance alone, and a quick chemistry lesson is all it takes to put it to rest.

Drinking bong water is straight up a bad idea. It won’t get you high, but it can absolutely make you sick. Here’s what you’re risking.

All those contaminants will irritate your stomach fast, which often leads to nausea and vomiting. Vomiting can then push you toward dehydration if you’re not careful.

Dirty bong water can send you on frequent, urgent bathroom trips with loose, uncomfortable bowel movements. Sharp abdominal cramping is common too, as the contaminated liquid works its way through your digestive system.

Standing bong water is a breeding ground for bacteria and fungi, including bugs like E. coli and Staphylococcus. Swallow that and you’re inviting a gastrointestinal infection, which can range from a rough couple of days to something that needs medical attention. Separately, regularly inhaling through a moldy, never-cleaned bong is linked to respiratory irritation and infections, which is its own reason to keep your piece clean. For a deeper look, see our guide on whether you can get sick from a dirty bong.

Since drinking it is off the table, here’s how to actually deal with it:

• Dump it down the drain. A toilet or sink works fine. Give the chamber a rinse afterward so resin doesn’t cake on.
• Don’t water your plants with it. It’s a popular myth that bong water helps plants. It doesn’t. The tar, ash, and potential mold can harm soil and roots, so keep it away from your garden.
• Change it every session. Fresh water before each use means cleaner, smoother, better-tasting hits. Letting it sit is how you end up with that swamp.
• Deep clean regularly. Rinsing isn’t enough long term. A periodic clean with coarse salt and isopropyl alcohol clears out resin and keeps mold from setting up shop.

Here’s a weird one. In 2009, the Minnesota Supreme Court ruled in State v. Peck (a 4-3 decision) that bong water containing a controlled substance could legally count as a “drug mixture” by weight for the purposes of charging someone. In that case, the roughly 37 grams of water in the bong tested positive for methamphetamine (not cannabis), and the weight was enough to support a first-degree drug charge.

It was controversial, and Minnesota lawmakers have since moved to exclude bong water from total drug-weight calculations. The takeaway isn’t that your cannabis bong water is contraband. It’s a reminder that drug laws can get strange fast, and they vary wildly by state. When in doubt about local rules, check your state’s current statutes.

Bong water will not get you high, full stop. THC doesn’t dissolve in water, most of it is absorbed the instant you inhale, and whatever’s left is bound to gunk your body can’t use. What bong water will do is make you nauseous, possibly worse. Dump it, rinse your bong, and refill with fresh water. If you want the most out of your weed, the answer is a clean piece and good flower, not a swig of swamp juice.

Curious what actually happens when cannabis hits your system the right way? Read up on how long a weed high lasts or, if you’d rather skip smoking altogether, learn how to make weed brownies.

Legal disclaimer: Cannabis laws vary by state and country and change frequently. This article is for informational purposes only and is not legal or medical advice. Always check your local regulations, and never consume contaminated water.