People are cautioned to avoid a recreation area used by children after a sewage leak.
The area near the BMX Parklands track in Ellesmere Harbor, and parts of the falls themselves, was covered with human waste and dirty water.
A local resident told ECHO that the smell was "vile" and that she had contacted the council with concerns about children playing in the area.
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She said: "I was standing next to a sewage stream running through a child's playground.
"The leak has stopped but the area has not been cleaned up. All human waste and God knows what is left in the grass.
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"There are no signs stating that the area is contaminated and I saw children playing there around 5pm yesterday (September 20)."
She said she also went for a walk around the area this morning adding: "It still absolutely sucks there."
The local council warned people to stay away from the site while the cleanup continues and United Utilities blamed a series of items that had been flushed down the toilet and caused a blockage for the leak.
A spokesperson for Cheshire West and Chester Council told ECHO: "United Utilities is responsible for the drain repairs and was on site yesterday.
"The council has not yet been given an estimate of when the repairs will be completed. Residents are advised to stay away from the site."
A United Utilities spokesperson said: "Our engineers are cleaning up on site after removing a blockage from a culvert that caused it to overflow at Parklands in Ellesmere Port. The BMX track was also cleaned and disinfected.
"The blockage was caused by an accumulation of items that should not be flushed down the toilet.
โEvery year thousands of homes and yards are affected by sewer flooding caused by people dumping wet wipes, cotton, diapers, cotton swabs and other items that pile up and wreak havoc in the gutters.
"It is vital to think before blushing."
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