Wine Fault

Volatile Acidity

Chemical

Volatile acidity measures acetic acid and other short-chain volatile acids that produce vinegar-like sharpness and nail-polish lift at high levels. Trace VA can add complexity; excessive VA is a chemical fault that dominates the palate.

Also known as: VA, Volatile acid fault, High VA

Typical severity: Medium

Cause

Elevated acetic acid and related volatile acids from bacterial activity, oxidation, or stressed fermentations.

How it occurs

Acetobacter, oxidative handling, and warm storage raise VA over time. Some hot-climate vintages and natural wines show higher baseline VA before becoming faulty.

Prevention

Oxygen control, SO₂ management, cool cellars, sanitation, and monitoring VA levels through analysis before bottling and release.

Descriptors created

Descriptors reduced

Commonly confused with

Common wine styles

Common grape varieties

Common regions

Related winemaking techniques

Serving implications

Beginner explanation

A little VA can smell like balsamic lift; too much reads as straight vinegar or nail polish remover.

FAQ

Is some VA acceptable?
Yes — many traditional wines show trace VA that adds aromatic lift. Fault thresholds depend on style and regional norms.
Can VA be reduced after bottling?
No — volatile acidity is stable in bottle. Prevention and blending decisions must happen before release.

Related ontology entities

See also

Fault identification guidance reflects common wine education practice and may vary by wine style, age, and context.