Manufacturers insist wipes labeled flushable aren't the problem, pointing instead to baby and other cleaning wipes marked as nonflushable that are often being used by adults.
"My team regularly goes sewer diving" to analyze what's causing problems, said Trina McCormick, a senior manager at Kimberly-Clark Corp., maker of Cottonelle. "We've seen the majority, 90 percent in fact, are items that are not supposed to be flushed, like paper towels, feminine products or baby wipes."
Wastewater officials agree that wipes, many of which are made from plastic, aren't the only culprits but say their problems have escalated with the wipes market.
Vancouver, Wash., sewer officials say wipes labeled as flushable are a big part of a problem that has caused that city to spend more than $1 million in the last five years replacing three large sewage pumps and eight smaller ones that were routinely clogging.
To prove their point, they dyed several kinds of wipes and sent them through the sewer for a mile to see how they would break up. They didn't.
Those labeled flushable, engineer Frank Dick said, had "a little rips and tears but still they were intact."
The Washington Suburban Sanitary Commission, which serves Montgomery and Prince George's counties in Maryland, has also spent more than $1 million over five years installing heavy-duty grinders, while the Orange County, Calif., Sanitation District, in a single year recorded 971 "de-ragging" maintenance calls on 10 pump stations at a cost of $320,000.
Clogging problems in Waukesha, Wis., prompted the sewer authority there to create a "Keep Wipes out of Pipes" flier. And Ocean City, Md., and Sitka, Alaska, are among cities that have also publicly asked residents not to flush wipes, regardless of whether they are labeled flushable.
The problem got worldwide attention in July when London sewer officials reported removing a 15-ton "bus-sized lump" of wrongly flushed grease and wet wipes, dubbed the "fatberg."