ISO 20121, explained for people who actually run events.

Sooner or later somebody in a procurement meeting is going to ask whether you're ISO 20121 certified. If you don't know what that is, you'll nod and look it up afterward and find a wall of standards language. Here's the version I wish someone had given me.

What it is

ISO 20121 is the international standard for event sustainability management systems. The number is just its catalog number at the International Organization for Standardization, the same body that publishes ISO 9001 for quality and ISO 14001 for environmental management. It came out in 2012, built in large part on the work done for the London Olympics that summer, and it was revised in 2024.

The two words that matter in that description are management system. ISO 20121 does not tell you how much waste to divert or what percentage of your décor has to be reusable. It doesn't grade your events. What it describes is a way of running your organization so that sustainability gets considered, on purpose, in every decision about every event, and so that you can show someone how.

What it actually asks you to do

Strip away the formal language and the standard asks for a handful of things that any well-run event company half does already.

• Know who you affect. Clients, guests, staff, suppliers, the venue, the neighbors, the people who grew your flowers. The standard calls them interested parties. You have to identify them and understand what they care about.
• Write down what you stand for. A sustainability policy, with the people in charge actually signing it, and a set of principles. In the standard those principles are stewardship, inclusivity, integrity, and transparency. I'd argue the last two are the ones our industry most needs.
• Figure out where your impact is. The standard calls these issues. For an event company they are the four things I write about everywhere on this site: what you reuse, what you grow versus buy, what you throw away, and where it all came from.
• Set objectives and plan how to hit them. Specific, with someone responsible and a date.
• Do the work, and keep records. Training, supplier requirements, how you communicate, how you run the events themselves.
• Check yourself. Measure, audit internally, and have management actually review the results.
• Fix what's broken and get better. The standard's whole shape is a loop: plan, do, check, act, repeat.

If that sounds like common sense, it is. The value of the standard isn't that any single piece is clever. It's that it forces you to do all of it, write it down, and prove it, which is exactly what most of us skip.

Who it's for

Anyone in the event supply chain. The standard was written to cover event organizers, venues, and suppliers alike, which means a floral and décor company, a caterer, a hotel's banquet department, a DMC, or a corporate planning team can all adopt it. The London 2012 organizers were the first big case, and since then it's been used by major sporting events, convention centers, festivals, and a growing number of agencies and production companies, mostly in Europe and increasingly in the United States.

Certified versus "aligned with"

This is where people get tripped up, and where some of the greenwashing I wrote about elsewhere happens.

Being certified means an accredited third-party certification body audited your management system against the standard and issued a certificate. It's a real credential with a real audit behind it, it has to be renewed, and you can name the certifier.

Saying your operation is "aligned with" or "based on" ISO 20121 means you used the standard as a guide. That's a perfectly honest thing to say if it's true, and it's where most small companies should start. What it is not is a certification, and writing "ISO 20121" on your proposal in a way that implies one when you haven't been audited is the kind of claim that will eventually embarrass you. Say which one you are.

Should a company your size bother?

Here's my honest take, as someone running a mid-sized event company and not a stadium.

Full certification is a real project. You'll need to document your system, train people, run internal audits, and pay a certification body for the external audit and the surveillance audits after it. For a small shop the cost in time is larger than the cost in dollars. If your clients are corporate planners whose procurement teams are asking for it, or if you want to compete for large international events, it may well be worth it, and the discipline it imposes is good for the business regardless.

For most companies in Orlando, though, I'd suggest a different path. Use the standard as your framework without chasing the certificate yet. Write the policy. Identify your four impact areas. Set a few objectives with names and dates on them. Measure. Review. That gets you ninety percent of the operational benefit, it gets you ready to certify later if a client requires it, and in the meantime you can say truthfully that you run on an ISO 20121 framework. That's exactly where Florida Fresh is today. We are building the system first and will decide about certification once we have a year of real numbers behind it.

How it fits with everything else

You'll hear other names in the same conversation. A few quick distinctions:

• ISO 14001 is the general environmental management standard for any organization. ISO 20121 is built on the same structure but written specifically for events, and adds the social and economic side. The Orange County Convention Center holds ISO 14001, for example.
• LEED certifies buildings. It tells you something about the venue, not about how the event inside it was produced.
• Florida Green Lodging is a state program for hotels. Same idea: it's about the property.
• Carbon accounting standards like the GHG Protocol tell you how to count emissions. ISO 20121 would tell you to decide whether to count them and how to act on the result.

None of these replaces the others. ISO 20121 is the one that's about how your organization behaves, which is why it's the one that belongs to the people reading this site.

If you want to go further

The standard itself is sold by ISO and by national standards bodies, and it's worth buying a copy if you're serious; it's shorter and more readable than you'd expect. If you'd rather talk it through first, that's part of what our free training sessions are for. We'll walk your team through what the standard asks, map it to your operation, and leave you with a plan you can actually run.