NOM-161-SEMARNAT: what Mexico requires when you dispose of electronics

What NOM-161 actually is, in plain English

NOM-161-SEMARNAT-2011 is the Mexican official standard that answers four questions about a category of waste the law calls special handling: how it is classified, which of it requires a formal management plan, what the complete list of those wastes is, and what a plan must contain to be valid. It hangs off the LGPGIR, Mexico's general waste law, and it has been in force since February 2013.

For a company that retires computers, servers or production scrap, the practical translation is short: your electronic waste is regulated, and disposal has to be documented. Handing the equipment to whoever offers to take it away is not disposal — it is an unresolved liability.

Mexico's three waste categories — and where your e-waste falls

Mexican law splits waste into three buckets, each with a different authority and a different rulebook:

• Hazardous waste (RP). Corrosive, reactive, explosive, toxic, flammable or biological-infectious. Federal jurisdiction, strictest rules.
• Special-handling waste (RME). Not hazardous in itself, but requiring differentiated management because of volume or composition. This is where electronic waste sits. State jurisdiction, with NOM-161 as the national framework.
• Urban solid waste (RSU). Household and comparable waste. Municipal jurisdiction — and explicitly not where your servers belong.

One nuance worth flagging: a single retirement project can produce waste from more than one bucket. Computers are special-handling, but certain batteries and lamps can qualify as hazardous, with their own storage and transport requirements. Sorting that out early avoids the most common compliance failure we see.

Who is actually obligated

Not every company has to file a plan, but more do than realize it. The obligated parties include large generators — those producing 10 tonnes or more of waste per year — along with producers, importers and distributors of the listed products. Note that the threshold counts your waste generation broadly, not just the electronics: a manufacturing site usually crosses it long before its IT department notices.

And if you sit below the threshold? The filing requirement may not reach you, but the disposal rules still do. Routing e-waste through a handler that documents the destination remains the only defensible position in an audit.

If your headquarters is outside Mexico, read this part

This is where foreign-headquartered operations get caught. A global ITAD policy, a signed agreement with a U.S. recycler, or an R2 certificate held by a vendor in another country does not satisfy a Mexican filing obligation. The duty attaches to the legal entity generating the waste in Mexico; the plan is filed with a Mexican authority, in Spanish; and the evidence has to exist locally.

Meanwhile your headquarters needs the same disposal reflected in its own reporting, in English, in a format its auditors recognize. Those two requirements are not in conflict — but nobody produces both unless the project is set up that way from the start. That is precisely what our cross-border ITAD service is built for.

What a management plan has to contain

A management plan is the instrument describing how your company minimizes, collects, transports and finally disposes of a given waste stream. NOM-161 sets its minimum elements:

• Baseline diagnosis — what you generate, how much, and where it comes from.
• Objectives and targets, including waste minimization and valorization.
• Operating mechanisms — collection, storage, transport and final destination.
• Participating parties and the responsibility each one carries.
• Traceability and reporting of the volumes actually managed.

Plans can be filed individually by one company or collectively by several companies in the same sector — a route that often makes sense for industrial parks and maquiladora clusters. See our dedicated guide on the RAEE management plan for the full breakdown.

How to comply, step by step

1. 1

   Map what your operation generates

   List the electronic waste streams your site produces — IT equipment, servers, production scrap, batteries, monitors — and estimate the annual volume. Your obligations are defined by what and how much you generate, so this diagnosis comes first.

2. 2

   Classify each stream correctly

   Determine which streams are special-handling waste and which — certain batteries or lamps, for example — may qualify as hazardous waste with stricter rules of their own. Misclassifying a stream is one of the most expensive mistakes in the process.

3. 3

   Draft your management plan

   If your company is an obligated party, prepare a management plan with the elements the standard requires: baseline diagnosis, objectives and targets, collection mechanisms, participating parties and final destination. It can be filed individually or collectively with other companies in your sector.

4. 4

   File it with the competent authority

   Submit the plan to the environmental authority that applies to your case — SEMARNAT at federal level, or the state authority, since special-handling waste falls under state jurisdiction. Keep the filing receipt: that document is your proof of compliance.

5. 5

   Dispose through a documented handler

   Route your electronic waste through a provider that documents collection, chain of custody and final destination for every lot, with certificates that back up your plan. A plan on paper with no evidence behind it does not survive an inspection.

6. 6

   File the evidence and report it

   Add certificates, manifests and metrics to your environmental file and your ESG report. In a PROFEPA visit or a corporate audit, that evidence — not your good intentions — is what protects the company.

What non-compliance actually costs

The formal exposure is administrative: fines, corrective measures and, in serious cases, closure, imposed by PROFEPA or state authorities. But in our experience the commercial exposure bites first. Parent companies, customers and certification schemes increasingly ask for proof of responsible disposal — and "we sold it to a scrap dealer" is not proof. A missing file can stall a supplier audit long before it attracts a regulator.

There is a third exposure that has nothing to do with environmental law: every undocumented drive that leaves your site is a potential data breach. Mexican data protection obligations follow the information through end of life, which is why certified data destruction belongs inside the same project, not next to it.

How Tianlu helps

We work the compliance side and the operational side together: assessment of the streams your site generates, support in drafting and substantiating the management plan, collection with documented chain of custody, certified data destruction before anything is recycled, and the complete evidence file at closure. Your Mexican operation gets service in Spanish; your headquarters gets documentation it can actually read.

Start with a no-cost assessment: tell us what your site generates and we will tell you where you stand, what your plan needs, and what the disposal looks like in practice. See also electronics recycling and IT asset disposition.