Ibiza's officials have fined venues almost €1.4 million since imposing stricter licensing laws on San Antonio in 2017.
There were a total of 345 complaints to authorities in the last two years, with the majority concerning noise pollution.
This is linked to a Special Acoustic Protection Zone, imposed on San Antonio's West End from January 2018 after venues were found to be breaking legal restrictions by 20db during the previous two seasons. The council also began implementing earlier club closing times.
According to a report by Diario de Ibiza, €630,000 of penalties have already been collected, and a further €747,000 are being processed. The latter figure is split across 20 venues, with one address accounting for €247,000 after receiving 93 noise complaints. Other reasons for the fines include promoting events without permission. Some venues may have to shutter doors for 85 days in addition to handing over revenue.