Do bidets actually save water?

Yes, dramatically. Making one roll of toilet paper takes about 37 gallons of water. A single bidet use consumes about 1/8 of a gallon. Even accounting for daily use over a year, a bidet uses about 50 gallons versus the 14,000 gallons needed to produce a year's supply of toilet paper for one person.

Are bidets bad for the environment because of electricity use?

Electric bidet seats use 2 to 5 kWh per month, which produces roughly 1 to 3 kg of CO2 depending on your grid. That's far less than the carbon footprint of the toilet paper they replace, which includes harvesting, pulping, bleaching, and shipping.

Is toilet paper really that bad for the environment?

Most US toilet paper is made from virgin wood, much of it from boreal forests in Canada. The NRDC has flagged this as a major driver of forest loss. Production is also water-intensive, bleach-intensive, and creates significant CO2 emissions per roll.

Are bamboo or recycled toilet paper a green alternative?

They're better than virgin-fiber toilet paper, but still require water, energy, and shipping to produce. A bidet plus 1-2 squares of recycled paper for drying is more efficient than relying on bamboo toilet paper alone.

Do bidets reduce plumbing problems?

Yes. Reducing toilet paper use cuts clogs and reduces what reaches wastewater treatment plants, which lowers municipal water treatment energy use marginally. Bidet-using households report fewer clogs and fewer plumber calls.

What's the carbon footprint of a non-electric bidet?

Essentially zero in operation. A non-electric attachment uses only water pressure from the supply line. The only embodied carbon is in manufacturing and shipping the unit, which is a one-time cost spread across a 10+ year lifespan.

The Environmental Impact of Bidets: Are They Actually Greener?

Q: How many trees does a bidet save?

The average American uses about 50 pounds of toilet paper per year, which works out to roughly half a tree per person annually. Across 330 million Americans, that's 165 million trees. A bidet typically cuts paper use by 75%+, saving most of that.

Bidets are often pitched as a green upgrade, but the claim deserves scrutiny. They use water. Electric seats use electricity. They have manufacturing emissions and end-of-life disposal. So are they actually better than toilet paper, or just a different kind of footprint?

The short answer: yes, by a wide margin. Here's the full math.

The True Cost of Toilet Paper

To understand why bidets win on environmental impact, you have to look at what goes into a single roll of toilet paper.

Trees

The average American uses about 141 rolls of toilet paper per year — roughly 50 pounds. That works out to about half a tree per person annually. Across 330 million Americans, that's 165 million trees per year, most sourced from old-growth and boreal forests in Canada, according to the Natural Resources Defense Council.

Water

According to industry life-cycle analyses, producing one roll of standard toilet paper requires about 37 gallons of water. A typical American household goes through 250 to 300 rolls per year, which means 9,000 to 11,000 gallons of water are consumed just to make their toilet paper.

Energy and Chemicals

Toilet paper production involves pulping, bleaching (often with chlorine compounds), drying, and shipping. The carbon footprint per roll is estimated at 1.3 pounds of CO2 — meaning a 250-roll household produces roughly 325 pounds of CO2 per year from toilet paper alone.

Packaging and Shipping

Plastic wrap, cardboard cores, and truck miles add a smaller but non-trivial layer to the footprint. Most rolls ship from out-of-state mills or international suppliers.

What a Bidet Actually Uses

Now the other side of the ledger.

Water per Use

A typical bidet wash cycle uses 0.10 to 0.25 gallons of water. At an average of 0.125 gallons per use and 3 uses per day, that's about 0.375 gallons per person per day, or 137 gallons per year.

Compare that to the 9,000+ gallons used to manufacture a single person's annual toilet paper. The bidet's direct water consumption is roughly 1.5% of what toilet paper production uses.

Electricity (Electric Seats Only)

Mid-range electric bidet seats like the TOTO Washlet C5 and Brondell Swash 1400 use 2 to 5 kWh per month with normal use — heated seat, warm water, occasional dryer use. That's $0.40 to $1.50 per month on average US electric rates.

Carbon-wise, on the average US grid (about 0.4 kg CO2 per kWh), that's 1 to 2 kg of CO2 per month, or 12 to 24 kg per year. Compare to the 147 kg of CO2 from a year of toilet paper — the electric bidet still wins by ~85%.

Non-electric attachments use zero electricity.

Manufacturing Footprint

A bidet seat has more embodied carbon than a single roll of toilet paper. But it lasts 8 to 15 years. Spread the manufacturing footprint over that lifespan and it's negligible compared to the recurring footprint of buying toilet paper every week.

The Net Math: A Year-Over-Year Comparison

For a single person switching from a 100% toilet paper habit to a bidet + minimal drying paper:

Resource	Toilet Paper Only	Bidet + Light TP	Savings
Trees	0.5 trees	0.1 trees	80%
Water (production + use)	~10,000 gal	~280 gal	97%
CO2 emissions	147 kg	30 kg	80%
Cost	$80-$120	$20-$35	70%+

Even if you assume an electric seat running 24/7 with maximum features, the bidet still wins on every dimension except first-year cost (offset within 3-4 years).

What About Sewage and Wastewater?

A common counterargument: bidets put more wastewater into the system. Is that worse?

In practice, no. The amount of additional wastewater per use (about 0.125 gallons) is trivial compared to a typical toilet flush (1.28 to 1.6 gallons). And reducing toilet paper in sewage actually helps wastewater treatment plants, since paper has to be filtered, broken down, and disposed of — all energy-intensive steps.

Toilet paper is also a leading cause of fatbergs and pipe clogs, especially when combined with grease and "flushable" wipes. Reducing how much paper goes into the system is a clear win for sewer infrastructure.

Are "Eco-Friendly" Toilet Papers Good Enough?

Bamboo toilet paper, 100% recycled toilet paper, and tree-free options are real improvements over virgin-fiber rolls. They typically cut the carbon footprint per roll by 30-60% and use less water in production.

But the math still doesn't beat a bidet. Even the greenest toilet paper requires water, energy, packaging, and shipping. A bidet uses one local resource (water) and provides indefinite use with one piece of hardware.

The best combo: a bidet plus a small amount of recycled or bamboo toilet paper for drying. Or a bidet with a built-in air dryer (covered in our best electric bidet seats roundup), which removes paper from the equation almost entirely.

What About the Plastic in Bidets?

Most bidet seats are made of ABS plastic, polypropylene, or similar polymers. They're not biodegradable. But:

A non-electric attachment weighs about 2 pounds and lasts 5 to 10 years.
An electric seat weighs 8 to 15 pounds and lasts 8 to 15 years.
Toilet paper packaging alone (plastic wrap on 6-pack rolls, multiplied across a year) adds up to several pounds of waste — non-recyclable in most regions.

Across a 10-year ownership, a bidet's plastic footprint is comparable to or less than the packaging waste of the toilet paper it replaces.

Eco-Friendly Bidet Buying Tips

If environmental impact is a top priority:

Pick non-electric if you can. A TUSHY Classic 3.0 or BioBidet SlimEdge uses zero electricity and lasts 8+ years.
If you want electric, pick a model with eco mode. TOTO and Brondell both ship eco-mode settings that drop standby power consumption substantially.
Get one with an air dryer. Eliminates most paper use entirely.
Buy once, buy well. A $200 bidet that lasts 12 years has a lower per-year footprint than three $80 bidets that fail in 4 years each.
Recycle the old unit when you upgrade. Some manufacturers (including Brondell) have take-back programs for old seats.

The Bottom Line

Bidets win on every environmental metric that matters: trees, water, carbon, packaging waste, and household cost. Even an always-on electric model uses a fraction of the resources of toilet paper, and a non-electric attachment is nearly footprint-free in operation.

If you're switching for the environment, you can skip the analysis paralysis. The bidet is unambiguously the better choice.

For the broader case (cost, hygiene, comfort), our bidet vs toilet paper breakdown covers everything beyond environmental impact. And if you're not sure which type of bidet fits your home, our how to choose a bidet guide walks through every option.