President Donald Trump’s latest effort to reshape US environmental regulations appears to involve toilets.

During a small business event at the White House Friday, Trump announced he has ordered a federal review of water efficiency standards pertaining to bathroom fixtures.

“People are flushing toilets 10 times, 15 times as opposed to once. They end up using more water,” Trump said, complaining that water flow in other fixtures has slowed to a trickle. “You can’t wash your hands practically, there’s so little water comes out of the faucet, and the end result is you leave the faucet on and it takes you much longer to wash your hands, you end up using the same amount of water.”

Here's Trump saying that he's heard from many people complaining about "flushing toilets 10 times, 15 times." pic.twitter.com/75HXYcH4xq — Aaron Rupar (@atrupar) December 6, 2019

Although Trump said during the event that the “EPA is looking at [water flow] very strongly, at my suggestion,” this review is actually mandated under 2018 legislation that directs the Environmental Protection Agency to investigate water regulations adopted before 2012.

These include the agency’s WaterSense program, which was first launched in 2006 in order to reduce the water use of fixtures like toilets. The requirement that toilets use a set amount of water began on the federal level in 1992, according to the Associated Press, when President George H.W. Bush signed the Energy Policy Act, a law mandating any toilets installed in homes after 1994 use 1.6 gallons of water or less per flush.

The WaterSense framework takes that law a step further, and is an optional standard that aims to promote “awareness about the importance of water efficiency,” according to the EPA. WaterSense certified toilets, for instance, use only 1.28 gallons per flush, or 20 percent less water than the standard created by the Energy Policy Act.

Other fixtures and appliances can be WaterSense certified as well — for instance, faucets with flow rates of 1.5 gallons per minute (using at least 32 percent less water than standard) meet the criteria.

The Energy Policy Act and the WaterSense certification exist to try to curb water waste; toilets in particular have been viewed as a prime opportunity to do so by experts. According to the EPA, toilets consume the most water of any plumbing fixture in a typical American home, using about 30 percent of a household’s water each month.

The agency also argues that replacing old toilets (commodes manufactured before 1980 typically use five gallons of water for each flush) can help save money: Replacing older toilets with WaterSense fixtures could “save more than $110 per year in water costs, and $2,200 over the lifetime of the toilets,” according to an EPA fact sheet.

Trump did not mention any of this Friday; it also is not clear just who — if anyone — is actually complaining about the need to flush toilets multiple times to eliminate waste. But his claims represent yet another example of the president’s advocacy for rolling back federal measures meant to protect the environment.

Trump’s continuing attacks on the environment

A potential rollback of water use regulations would fit the administration’s continued efforts at deregulating the EPA. The New York Times has identified 53 separate rules that have completed the rollback process at the agency, and 32 more that are still in the works. The president has been a vocal skeptic of climate change since the earliest days of his candidacy for president, but nonetheless campaigned to “to promote clean air and water,” in 2016.

He has continued campaigning on that point, and has told audiences thanks to his policies, “We have among the cleanest and sharpest — crystal clean, you’ve heard me say, I want crystal clean — air and water anywhere on Earth.”

The quality of air and water in the US is mixed, with lead contamination and air pollution of increasing concern to scientists. Trump, however, has done little to address these issues, and began unraveling the environmental protections put in place by his predecessors almost immediately after assuming office, as Vox’s Matthew Yglesias has explained:

Trump’s policy of prioritizing natural resource extraction over environmental regulation has resulted in a growth in greenhouse gas emissions, with a report from the research firm Rhodium Group finding US carbon emissions rose 3.4 percent in 2018.

Countries around the world were told to lower emissions by almost that exact amount — 3.3 percent per year — starting in 2010 by the UN in order to keep global warming at just 1.5 degrees Celsius. (It is now, of course, too late for that, and global emissions must fall by 7.6 percent a year to reach that 1.5 degrees Celsius target.)

With that global temperature rise, water availability and quality is expected to shift; experts expect that water preservation will only become more urgent as time goes on, making the matter of how Americans flush their toilets more pressing that in may seem.