Tequila — Depth
CRT & NOM-006-SCFI · the Denominación de Origen & the 5 states · Blue Weber agave · 100% agave vs mixto · Blanco / Reposado / Añejo / Extra Añejo / Cristalino · cooking, milling & the diffuser controversy · NOM codes & key brands
Verified: CRT · NOM-006-SCFI-2012 · DOF · IMPI · Cuervo / Sauza / Herradura / Patrón / Fortaleza / Tapatío / Ocho
Tequila is a Mexican distilled spirit made from the Blue Weber agave (Agave tequilana Weber, variety azul), protected by a Denominación de Origen (DO) established in 1974 and regulated under the official standard NOM-006-SCFI-2012, enforced by the Consejo Regulador del Tequila (CRT). It may only be produced in the state of Jalisco plus designated municipalities of Guanajuato, Michoacán, Nayarit and Tamaulipas. Two compositional classes exist: 100% agave Tequila (entirely from Blue Weber agave sugars, bottled within the DO zone) and mixto (at least 51% agave sugars, the rest from other sugars such as cane). Categories are defined chiefly by oak aging: Blanco/Plata (unaged–2 months), Joven/Gold (blended or lightly aged), Reposado (2–12 months in oak), Añejo (1–3 years in oak ≤600 L), Extra Añejo (≥3 years), and the modern filtered Cristalino. Production runs from cooking the agave piñas (traditional masonry hornos or autoclaves), through milling (traditional tahona stone, roller mill, or the efficiency-focused and controversial diffuser), fermentation, and double distillation. Every producer carries a NOM identification number tracing the distillery of origin.
The CRT, NOM-006 & the Denominación de Origen
Tequila is one of the most tightly regulated spirits in the world, governed by a layered system of Mexican law, an official technical standard, and an enforcement body that inspects every stage of production.
The Denominación de Origen Tequila (DOT)
The Denominación de Origen Tequila was established in 1974, making Tequila one of the first spirits in the Americas to receive geographical-indication protection (registered internationally under the WIPO Lisbon Agreement). The DO restricts where Tequila may legally be produced to a defined territory: the entire state of Jalisco (the heartland, home to the town of Tequila and the Jalisco Highlands/Los Altos), plus listed municipalities in four other states — Guanajuato, Michoacán, Nayarit and Tamaulipas. Agave grown outside this zone cannot be made into Tequila.
NOM-006-SCFI — the Official Standard
The technical rulebook is NOM-006-SCFI-2012 ("Bebidas alcohólicas–Tequila–Especificaciones"), a Norma Oficial Mexicana published in the Diario Oficial de la Federación. It defines the permitted raw material, the two compositional classes, the aging categories, the permitted production methods, alcohol limits (35–55% ABV), labelling rules, and the NOM identification system. It is the document that ultimately determines what may legally be called Tequila.
The CRT — Consejo Regulador del Tequila
The CRT, a private civil association accredited by the Mexican government, is the enforcement body. It verifies agave maturity and origin, inspects distilleries, audits the agave-to-Tequila yield (to detect dilution or fraud), certifies compliance with NOM-006, issues the export certificates, and assigns and tracks the NOM numbers. Its inspectors are present throughout the supply chain — the CRT is the reason the category's integrity is comparatively well policed.
| Element | Detail |
|---|---|
| Denominación de Origen | Established 1974; registered under WIPO Lisbon Agreement |
| Production zone | All of Jalisco + listed municipalities of Guanajuato, Michoacán, Nayarit, Tamaulipas |
| Official standard | NOM-006-SCFI-2012 (Diario Oficial de la Federación) |
| Regulator | Consejo Regulador del Tequila (CRT), Guadalajara |
| IP authority | IMPI (Instituto Mexicano de la Propiedad Industrial) |
| Raw material | Agave tequilana Weber, var. azul (Blue Weber agave) only |
| Bottling ABV | 35–55% ABV (commonly 38–40%) |
| NOM number | 4-digit code on every bottle identifying the distillery |
Blue Weber Agave, and 100% Agave vs Mixto
Tequila rests on a single plant: Agave tequilana Weber, variety azul — the Blue Weber agave. It is a large succulent (not a cactus) that takes roughly 6–8 years to mature before harvest, when the leaves (pencas) are stripped to reveal the heart, the piña (so called because it resembles a giant pineapple, often weighing 40–90 kg). The piña stores the plant's energy as complex carbohydrates (chiefly inulin, a fructose polymer) which cooking converts into fermentable sugars.
The Highlands / Lowlands Divide
Within the DO, two terroirs are widely recognised. Los Altos (the Highlands, east of Guadalajara) has high-altitude, iron-rich red clay soils and tends to produce agave giving sweeter, more floral, fruitier Tequila. The Valles (the Lowlands, around the town of Tequila itself) has volcanic soils and tends toward earthier, more herbaceous, peppery profiles. Many producers blend or favour one.
The Single Most Important Label Distinction
More than any aging category, the dividing line that separates quality Tequila from industrial Tequila is the compositional class:
| 100% Agave | Mixto | |
|---|---|---|
| Sugar source | 100% Blue Weber agave | ≥51% agave; up to 49% other sugars (usually cane) |
| Label | Must state "100% agave" / "100% de agave" | Simply "Tequila" (no 100% claim) |
| Bottling location | Must be bottled within the DO zone in Mexico | May be exported in bulk and bottled abroad |
| Character | Fuller agave flavour; the quality standard | Lighter, often the base for margaritas and "gold" mixto |
The Category Ladder — Aging Classes
Once distilled, Tequila is classified by how long it spends in oak. NOM-006 defines the official categories (clases); the unaged spirit is the base, and each step up adds oak time, colour and wood character at the expense of bright agave freshness.
| Category | Oak aging | Character |
|---|---|---|
| Blanco / Plata (Silver) | Unaged, or up to 2 months in oak | Clear; the purest expression of agave — peppery, citrus, vegetal, sweet cooked-agave; the connoisseur's benchmark and the bartender's base |
| Joven / Oro (Gold) | Blanco blended with aged, or lightly aged/coloured | Often a mixto with caramel colour ("gold"); but premium "joven abocado" can be a blanco/reposado blend |
| Reposado (Rested) | 2–12 months in oak | Pale gold; balances agave with light vanilla/caramel/spice from the wood; the most popular category in Mexico |
| Añejo (Aged) | 1–3 years in oak ≤600 L (govt-sealed) | Amber; richer, smoother, more oak — vanilla, toffee, dried fruit; agave more in the background |
| Extra Añejo (Ultra-aged) | Minimum 3 years | Dark; introduced as a category in 2006; whisky/cognac-like depth; agave can be largely masked at the extreme |
| Cristalino | Aged then charcoal-filtered to clear | A modern commercial style: an añejo/extra añejo filtered to remove colour while keeping some oak sweetness; popular but debated among purists |
Production — Cooking, Milling & the Diffuser Controversy
Turning a starchy agave piña into Tequila has four core stages — cooking, extraction (milling), fermentation, distillation — and at two of these stages the choice of method is the heart of the modern quality and authenticity debate.
1. Cooking the Piña
The piña's inulin must be hydrolysed into fermentable sugars by heat. Three methods: traditional masonry ovens (hornos / mampostería), which cook slowly (1–3 days) and develop rich cooked-agave and caramelised flavours; stainless-steel autoclaves (pressure cookers), which are far faster (hours) and more common at scale; and, at the industrial extreme, the agave can be shredded raw and its sugars extracted by a diffuser before any cooking (see below).
2. Extraction / Milling
| Method | How | Reputation |
|---|---|---|
| Tahona | A large stone wheel (volcanic) crushes cooked agave in a circular pit, the traditional artisanal method | Prized; labour-intensive; gives earthy, textured character; used by Fortaleza, Tapatío, Patrón (in part) |
| Roller mill | Mechanical shredder-rollers wash sugars from cooked agave fibre with water | The industry standard; efficient and clean; the majority of Tequila |
| Diffuser | Industrial machine that extracts sugars from agave (sometimes raw, uncooked) with hot water/acid, then the syrup is cooked separately | Controversial — maximises yield and cuts cost, but critics say it strips agave character; see below |
The Diffuser Controversy
The diffuser is the flashpoint of modern Tequila debate. It is a continuous industrial extractor that can pull sugars from agave fibre extremely efficiently — in some operations from raw, uncooked agave, with the extracted syrup then cooked, hydrolysed (sometimes with acid enzymes), and fermented. Producers use it because it dramatically increases yield (more Tequila per agave) and lowers cost, important as agave prices swing wildly. Critics — including many traditional producers and aficionados — argue diffuser Tequila, especially raw-agave diffuser production, strips out the cooked-agave flavour and terroir that define good Tequila, producing a thinner, more neutral, more "vodka-like" spirit dressed up with additives. NOM-006 permits the diffuser, and it is not disclosed on labels, which is the core of the complaint: consumers cannot tell from the label whether traditional or diffuser methods were used.
3–4. Fermentation & Distillation
The extracted sugars (mosto) are fermented — traditionally with open-air/wild yeast, more often now with cultured yeast — then distilled, almost always twice (the second distillation is the rectificación), typically in copper pot stills (alambiques) or stainless columns, to reach the spirit strength before dilution and any aging.
NOM Codes & Key Brands
Every bottle of Tequila carries a NOM number — a four-digit code identifying the distillery where it was produced (not the brand). Because many brands are made at a handful of large contract distilleries, the NOM number lets you see who actually distilled a given Tequila. A single NOM can produce dozens of different brands. Ownership reflects long-documented positions, subject to change.
The world's biggest Tequila company, family-owned (Beckmann family), tracing to an 18th-century land grant. Makes Jose Cuervo (the global volume leader, much of it mixto), plus premium 1800 and the artisanal Reserva de la Familia. A dominant force in the category's history.
One of the historic giants of the Lowlands (Valles), now owned by Beam Suntory. Known for efficient, modern, diffuser-era production at scale; Sauza, Hornitos and Tres Generaciones. A reference for the industrial side of the category.
A historic estate distillery (Hacienda San José del Refugio), now owned by Brown-Forman. Known for traditional methods including natural fermentation, and credited with creating the first commercial Reposado (1974) and Extra Añejo (Selección Suprema). Highly regarded.
The brand that arguably created the modern ultra-premium Tequila market from the 1990s. Uses both tahona and roller-mill production blended together, all 100% agave. Acquired by Bacardi in 2018 in one of the largest spirits deals ever. Defined "luxury Tequila" globally.
A cult traditionalist producer run by a descendant of the Sauza founding family, made the old way: stone-oven cooking, tahona milling, open fermentation, copper pot stills. A benchmark for traditional, additive-free, full-flavoured Tequila prized by enthusiasts.
A historic Highlands distillery (founded 1937) making the traditional Tapatío and El Tesoro brands by tahona and traditional methods — long revered by aficionados for purity and agave intensity.
A modern artisanal brand notable for being the first to bottle single-estate, vintage-dated Tequila — treating agave fields like vineyards and showing how terroir (specific ranchos) and year change the flavour. An influential "terroir Tequila" project.