Dan Marioni Acid Rain Pet Nat 2019

Acid Rain is a pétillant naturel from Dan Marioni sourced from a small vineyard on the slopes of the Sonoma Mountain AVA. The grapes — Pinot Noir and Chardonnay — are co-fermented together as a field blend on gravelly loam soils. The wine is made using méthode ancestrale: a single continuous fermentation that finishes in the bottle, trapping natural CO2 without any secondary fermentation additions.

Winemaking is zero-zero. Spontaneous fermentation in open-top stainless steel vats, no added sulfites, no fining, no filtration. The wine ages for approximately five months in bottle under lees before release. Expect gentle, fine bubbles with a slight haze from the residual yeast sediment.

The Sonoma Mountain AVA sits on the eastern slopes of the Sonoma Mountains above Glen Ellen, within the broader Sonoma Valley AVA. Vineyards here sit above the valley fog line, with higher minimum temperatures and lower daytime highs than the valley floor — a thermal belt effect that produces gradual ripening, naturally higher acidity, and concentrated fruit. Soils at vineyard level are gravelly loam, well-drained and low fertility.

This is Marioni's first vintage under his own label, released in 2019 the same year Sonoma Mtn Winery wound down and he launched Marioni Wine. Nothing added, nothing taken away.