Council bosses have warned Glastonbury Festival it may limit the amount of alcohol people can take in.
The warning has been made as part of a wide-ranging report into last year's event has been published by the local authority.
It makes several recommendations on areas of improvement - including cleaning the toilets more often.
The report said the iconic festival had been generally "well planned and managed" in 2019.
But it added that there were nine areas which needed attention for 2020 - including a closer look at booze and toilets.
The document, published by Mendip District Council, has floated a potential limit to the amount of drink people can bring in for personal use at subsequent festivals.
Funny pictures of revellers using ingenious contraptions to carry crates of alcohol onto the site appear each year.
But those could become a thing of the past to ensure the council provides a "safe event".
Claire Malcolmson, of the council, said: "The Glastonbury Festival has a worldwide reputation and as such it means that we have a huge responsibility in ensuring that it undertakes its statutory duties.
"The purpose of the licence, the licensing objectives and other legislation is to ensure event organisers provide a safe event whilst minimising disruption and nuisance to the local community."
The report also recommended that the site's toilets need to be serviced and cleaned more frequently.
It added that compost loos should be provided with “utensils” to allow compost to be scooped when needed.
More work is also needed to prevent “cross-contamination” between drinking water taps and toilets, it said.
The site hosts thousands of toilets each year, varying from portable loos to the traditional 'long drop'.
The other areas of improvement highlighted in the report include food hygiene and safety, noise complaints, security and transport.
The council made a number of proposed changes in 2017 which were then implemented by the festival for 2019.
No event was held in 2018 to allow for the farm site to recover.
However, organisers are yet to comment on the latest findings, published last week (Thurs).
This year's festival - which is now the world's largest - will be held between June 24 and 28. Tickets sold out in just half an hour.
Paul McCartney and Taylor Swift are the only two headliners to have confirmed so far.
