A grim video shows the moment an endless wave of foul-smelling black sludge – believed to be raw sewage – pours over a sandy beach where tourists sunbathe and children play.
The disgusting sight, recorded from a hotel balcony at Acapulco beach in Mexico, has outraged the local community after the footage was shared online.
In the clip, a violent gush of dark water pollutes the sands, before pouring into the turquoise sea and turning it a murky brown.
The witness who filmed the stinking mess told Reuters: “The constant outflow of black water lasted approximately 25 minutes, which came with a lot of pressure.
“They were very stinking waters, they made me nauseous.”
Unsurprisingly, the foul video generated a furious backlash on social media, with people demanding answers for the pollution.
Sounding disgusted, one person tweeted: “Enjoy your swimming! That is raw sewage being dumped into Acapulco Bay.
“Sadly, this happens all too often.”
A second fuming viewer tweeted: “Please share this disgusting video with your followers and tag people, celebrities, influencers and news media who need to see this and as dumping sewage/black water into #Acapulco contaminating the water & killing marine life is NOT OKAY AND MUST BE STOPPED NOW!”
Another fuming eco-warrior said: “Thousands of gallons of disgusting raw sewage going into Acapulco Bay.
“Killing beautiful marine life, I literally hate to see it.
“When people pollute the ocean, we are all affected. #savethereef “
The filth has upset locals so much that a petition has been launched on change.org to make dumping raw human waste on beaches illegal.
Directed at the mayor of Acapulco, Adela Román, the campaign reads: “I am going to cut right to the point, I care not only because this is a tourist attraction, it is also a place where local residents can come whenever they please.
“They can have a relaxing day at the beach, hangout with their families, or even have some alone time with their significant others.
“The thing is they cannot do that when there is raw sewage contaminating the bay.
“The smell, the feeling of that touching your bare skin doesn’t that sound disgusting?
“How would you feel if your local body of water was contained with human feces? I bet you would be very upset and disgusted!”
The Mexican state of Guerrero denied that the water was part of the drainage system or a sewage tank rupture in a statement on Facebook.
The Secretariat of Environment and Natural Resources is launching an investigation into the cause behind the alleged spill.