These three words get used as though they were interchangeable, usually by people selling something. They are not interchangeable. Two of the three describe products that the federal government regulates as pesticides, with specific performance numbers they have to hit in a laboratory before they can carry the word on the label. The third describes soap, water and effort.
Here is what each one actually means, what the published standards require, and — the part almost nobody will tell you — why most of the surfaces in your building need the cheapest of the three.
The three words, defined
Cleaning removes. CDC puts it plainly: cleaning is “done with water, soap, and scrubbing,” and it “removes germs, dirt, and impurities from surfaces.” Germs are not killed. They are lifted off the surface and carried away in the cloth or the mop water. There is no EPA registration for cleaning, because nothing is being claimed about killing anything.
Sanitizing reduces. A sanitizer is an EPA-registered antimicrobial pesticide that has to prove a specific reduction in a specific time against specific organisms. For a non-food-contact surface, the standard is a 99.9% reduction — three logs — within five minutes, tested against Staphylococcus aureus and Klebsiella pneumoniae. Bacteria only. A sanitizer makes no claim at all about viruses or fungi.
Disinfecting kills. A disinfectant is also an EPA-registered antimicrobial pesticide, but the bar is considerably higher: it has to demonstrate that it destroys or irreversibly inactivates bacteria, fungi and viruses, for each organism named on the label. This is why disinfectant labels carry lists of organisms and a different contact time for each one.
| Cleaning | Sanitizing | Disinfecting | |
|---|---|---|---|
| What it does | Removes germs and soil | Reduces bacteria | Kills bacteria, viruses, fungi |
| EPA registration | None required | Required — antimicrobial pesticide | Required — antimicrobial pesticide |
| Performance standard | None — it is a physical process | 99.9% in 5 min (non-food-contact); 99.999% in 30 sec (food-contact) | Efficacy proven per organism named on the label |
| Organisms covered | Not applicable | Bacteria only | Bacteria, fungi and viruses per label |
| Typical label contact time | Not applicable | 30 seconds – 5 minutes | 1 – 10 minutes |
| Surface must be clean first | — | Yes | Yes |
The uncomfortable part: most of your building needs cleaning
We sell commercial cleaning for a living, so read the next paragraph with that in mind — and then go and check it against the source, because it is CDC’s position, not ours.
CDC’s guidance on cleaning and disinfecting states that “in most situations, cleaning alone with soap and water can remove most germs,” and that disinfecting “is likely not needed unless someone is sick or if someone sick has recently visited.” The agency recommends disinfecting “when someone is sick or at higher risk of getting sick” — not as a default, and not everywhere.
Which means that a cleaning company telling you every surface in your building needs disinfecting every night is selling you chemistry the public health guidance does not support. It also, as we are about to explain, probably is not delivering disinfection at all.
Which surfaces need what
Here is a working rule for a commercial building. Take it to your current provider and ask them to mark up your own scope against it.
| Surface | What it needs | Why |
|---|---|---|
| Desks, tables, workstations | Clean | Cleaning removes most germs; nothing requires routine disinfection here |
| Floors — all types | Clean | Not a meaningful transmission route. Disinfecting floors is the least defensible line in most scopes |
| Glass, mirrors, partitions | Clean | Appearance, not pathogens |
| Door handles, push plates, switches, elevator buttons | Clean daily; disinfect during respiratory season or after known illness | Genuinely high-touch, but only if the contact time is actually observed |
| Shared keyboards, phones, headsets | Clean; disinfect only with a product labelled for electronics | Most disinfectants will damage the equipment |
| Restroom fixtures — toilets, urinals, flush handles, partitions | Clean, then disinfect | Faecal-oral route. The clearest case for routine disinfection in any building |
| Restroom floors | Clean with a disinfectant cleaner | Splash and spill zone; the disinfectant here is reasonable, not essential |
| Break room counters and sinks | Clean, then sanitize | Food is handled here, even if it is not prepared here |
| Commercial kitchen food-contact surfaces | Clean, then sanitize at Food Code concentration | Legally specified — see the table below |
| Gym and fitness equipment contact points | Clean, then disinfect | Sweat plus direct skin contact plus shared use |
| Medical and dental clinical surfaces | Clean, then disinfect per CDC infection-control guidance | A different regime entirely — see our frequency guide for clinics |
Where sanitizing is not optional: food-contact surfaces
If your facility prepares or serves food, the FDA Food Code specifies the sanitizer concentration, and the county health inspector will test it with a strip.
| Sanitizer | Concentration | Conditions | Minimum contact time |
|---|---|---|---|
| Chlorine | 25–100 ppm | pH ≤ 10; temperature varies with concentration | 10 seconds |
| Iodine | 12.5–25 ppm | pH ≤ 5; 68°F | 30 seconds |
| Quaternary ammonium | 100–400 ppm per manufacturer | 75°F; pH per manufacturer | 30 seconds |
Note what all three have in common: a concentration range with a floor and a ceiling. Stronger is not better. Over-concentrated quat leaves residue on food-contact surfaces and is a violation in its own right.
Three reasons the disinfection in your building probably is not working
This is the part that matters more than the vocabulary.
- The contact time is not observed. Every disinfectant label specifies how long the surface must remain visibly wet for the claim to hold — commonly anywhere from one to ten minutes, and often different for different organisms on the same label. A cleaner spraying a desk and wiping it immediately has left the product in contact for perhaps fifteen seconds. The chemistry did not have time to work. You paid for a disinfectant and received a cleaner.
This is, in our experience, the single most common failure in commercial cleaning, and it is invisible from the outside, because a wiped desk looks identical either way.
- The surface was not cleaned first. CDC’s instruction is explicit: “Clean surfaces before you disinfect them.” Soil, grease and organic matter physically shield organisms from the product and, with quats in particular, chemically neutralise it. Spraying disinfectant onto a visibly soiled surface is close to pointless. Disinfection is a second step, not a substitute for the first.
- The cloth is eating the product. Quaternary ammonium compounds carry a positive charge; cotton and other natural textiles carry a negative one. Soak cotton towels in a quat solution and the fabric absorbs the active ingredient — published field reports put the loss at up to 50% of the quat level before the product ever touches a surface. The bucket tests fine when you mix it and under-delivers by the time it reaches the desk. Newer work has observed the same effect with microfibre, so the safe assumption is that any pre-soaked cloth system needs its concentration verified with test strips rather than trusted.
Add the fourth, which is simple dilution error — concentrate mixed by eye rather than metered — and you have four ways to pay for disinfection and get none.
One more thing worth knowing: these products are pesticides
Sanitizers and disinfectants are registered by the EPA as antimicrobial pesticides, under the Federal Insecticide, Fungicide, and Rodenticide Act — the same statute that governs insecticides and weedkillers. In California they are also registered with the Department of Pesticide Regulation.
That reframes the question. Nobody asks for more insecticide than the job needs. Disinfectant deserves the same thinking: use it where there is a reason, at the labelled concentration, for the labelled contact time, on a surface that has been cleaned first.
One California footnote, since we clean schools and childcare facilities: under the Healthy Schools Act, antimicrobials such as disinfectants are exempt from the notification and reporting requirements that apply to other pesticides at school sites. Training, however, is still required for anyone applying a pesticide. Exempt from paperwork is not the same as unregulated.
What to ask your current provider
- Which lines in my scope are cleaning, which are sanitizing, and which are disinfecting? If the scope does not distinguish them, it has not been thought about.
- What is the contact time on the disinfectant you use, and how does the crew observe it? There should be a real answer — apply first and return, or a product with a short dwell time.
- Are surfaces cleaned before disinfectant is applied? A one-step disinfectant cleaner is a legitimate answer; “we just spray it” is not.
- How is the dilution controlled? Metered dispensing or test strips. Not judgement.
- Can I see the label for every product used in my building? You are entitled to it, and the label answers most of the questions above by itself.
Frequently asked questions
What is the difference between cleaning, sanitizing and disinfecting?
Cleaning physically removes germs and soil using soap, water and scrubbing; it kills nothing and requires no EPA registration. Sanitizing reduces bacteria — an EPA-registered sanitizer must achieve a 99.9% reduction within five minutes on a non-food-contact surface, or 99.999% within 30 seconds on a food-contact surface. Disinfecting kills bacteria, fungi and viruses, and a disinfectant must prove efficacy against each organism named on its label.
Does an office need to be disinfected every day?
Generally no. CDC states that in most situations cleaning alone with soap and water removes most germs, and that disinfecting is likely not needed unless someone is sick or has recently been in the space. Routine daily disinfection is reasonable for restroom fixtures and shared high-touch points, and is hard to justify for desks, floors and glass.
Is sanitizing the same as disinfecting?
No. A sanitizer is only tested against bacteria and only has to reduce them by 99.9%. A disinfectant must destroy or irreversibly inactivate bacteria, fungi and viruses for each organism on its label. A product labelled as a sanitizer makes no viral claim at all.
Why isn’t my disinfectant working?
Usually one of four reasons: the surface was not cleaned first, so soil shielded and neutralised the product; the contact time on the label was not observed and the surface was wiped dry within seconds; the solution was diluted by eye rather than metered; or cotton towels absorbed the quaternary ammonium, which can cut the effective concentration by up to half before it reaches the surface.
Are disinfectants regulated?
Yes. The EPA registers sanitizers and disinfectants as antimicrobial pesticides under FIFRA, the same statute covering insecticides and herbicides, and California requires separate registration with the Department of Pesticide Regulation. Label directions, including contact time and dilution, are legally enforceable instructions.
Get your scope marked up
JAN-PRO Commercial Cleaning in Sacramento will walk your building with you, go surface by surface, and tell you which of the three each one actually needs — including the places where the honest answer is “cleaning is enough.” Free facility visit, about twenty minutes.
Call (916) 376-8977 or request a facility visit online.