LONDON, Oct 3 (Reuters) - Johnnie Walker scotch whisky maker Diageo PLC's CEO Ivan Menezes believes Scotland could face a water shortage in the next 10 to 20 years due to climate change, he said at the Reuters Impact conference on Monday.

The threat in Scotland, where Diageo is the biggest exporter of Scotch whisky, according to its website, depends on how successful the world is at averting severe climate change, Menezes said.

"There are scenarios where we could see being water-stressed in Scotland," he said.

Diageo's beer business manufacturing Guinness stout consumes more water than spirits, he added.

Menezes said that part of his compensation is tied to Diageo hitting specific environmental goals including on water conservation.

Diageo also makes Don Julio tequila, Smirnoff Vodka and Baileys liqueur.

Separately, Menezes said that Diageo is "not immune" to inflationary pressure and soaring energy costs, but "should be okay" if Europe faces energy blackouts as soon as tomorrow.

Russia's war on Ukraine has driven energy prices to record highs, hitting Europe particularly hard because of its dependence on Russian gas.

"We should be well-covered," he said.

Diageo sees water conservation and environmental efforts as "really core to the long-term health of the business," Menezes said.

"We're a consumer business so it will translate into consumer preference over time," Menezes said. "We have a strong conviction about that."

The company is replenishing water in stressed areas it operates in, including in India by 2024.

The spirits industry has managed to avoid taking a hit from an ongoing cost-of-living crisis in Europe. Diageo recently reported strong sales of its most expensive products.

The company said during its earnings call in July that its products were selling because people consider them an occasional indulgence, even as high inflation stoked by Russia's war with Ukraine shows no signs of abating. (Reporting by Richa Naidu in London and Jessica DiNapoli in New York; Editing by Matt Scuffham and David Evans)