HOCl for Schools & Education

School sanitation is decided by three things that have nothing to do with chemistry: how many custodians the district can keep, how much of the budget survives to the cleaning line, and whether anyone would be comfortable with the product being used in a room full of eight-year-olds. Everything else follows from those.

That is why onsite generation fits the sector well, and also why the argument for it is different here than anywhere else on this site. In a food plant the case is chemical spend and consistency. In a district it is more often that a solution made on site, at use strength, from salt and water, is one a custodian can carry through an occupied building without a respirator, a dilution station or a locked cabinet — and that the cost per litre falls far enough that high-touch cleaning actually gets done at the frequency the policy claims.

What makes a school different

Onsite generation does not fix staffing or budgets. What it changes is the cost and handling profile of the solution itself, which is usually the binding constraint on how often high-touch surfaces actually get cleaned.

The organisms that drive risk here

The research hub indexes published work on hypochlorous acid and electrolysed water against several of these, including virucidal efficacy on surfaces against murine norovirus, liquid and fog application against human norovirus on surfaces, neutral hypochlorous acid against avian influenza virus and other avian viruses, dilute hypochlorite and electrochemically activated saline against MRSA and fungicidal efficiency of electrolysed oxidising water on Candida albicans. These are studies under their own test conditions, not claims for our systems; the pathogens page takes each in turn.

One honest note that belongs on a school page: Cryptosporidium is notably resistant to chlorine-based chemistry. Where it is the concern — typically water play or an outbreak in an early-years setting — the answer is exclusion, hand hygiene and the health department’s guidance, not a stronger spray.

Asthma, and why it is the first question

Roughly one child in a dozen has asthma, and cleaning and disinfecting products are a recognised trigger and a recognised occupational hazard for the custodians who use them all day. In practice this is the most consequential product-selection criterion in a school, and it is usually the one a supplier conversation avoids.

The practical consequences are concrete. Products that produce noticeable fumes get relegated to after-hours use, which means the high-touch surfaces that matter during the day are not being cleaned during the day. Aerosol and heavily-fragranced products cause complaints and then quiet non-compliance. And a custodian who finds a product unpleasant will dilute it weaker than the label says, which is a failure mode no set point on a datasheet will catch.

Near-neutral hypochlorous acid at use strength is typically far milder than bleach or quat solutions at working dilution, which is why it suits continuous use in occupied rooms. That is a handling argument, not an efficacy claim — and ventilation still follows the label and your own risk assessment. Per the HOCl-AS200 SDS, splash goggles are recommended as good practice, with no gloves or respirator required for normal use.

Where it is used, building by building

The cafeteria is a regulated food operation

Everything else in a school is governed by district policy. The cafeteria is governed by law, and it is worth separating clearly in the programme.

Alongside that, the cafeteria works to the Food Code as adopted by your state or local health authority. That adopted edition sets the permitted chemical sanitising conditions for food-contact surfaces and requires a test kit for the sanitizer in use. We deliberately do not print a concentration here: adopted editions differ, and a figure copied from a supplier page into a kitchen procedure is exactly the sort of error an inspection finds. Read the edition your health department has adopted.

The wider regulatory picture, including 21 CFR 178.1010 for food-contact surfaces, is on the regulations page. Research relevant to kitchen surfaces includes neutral electrolysed water for sanitising cutting boards and neutral electrolysed water on stainless steel.

Sizing for a school or a district

There are two architectures, and the choice is usually made on logistics rather than chemistry.

That last point matters more than it sounds. Hypochlorous acid decays with light, heat and time, so a central model needs opaque, closed containers, a short and reliable distribution cycle, and strength testing at the building rather than at the generator. Published work on how these solutions hold their strength is indexed as stability of electrolysed oxidising water. A district that cannot commit to the delivery cadence should put units in buildings instead.

Other sizing inputs: number and size of buildings, square footage by surface type, custodial headcount and shift pattern, cafeteria volume, athletics facilities, bus fleet, and the feed-water hardness at each site.

Custodial reality, and what actually gets cleaned

Every district has a cleaning policy that specifies high-touch frequency. Very few districts achieve it, and the reason is almost never the product. It is that the person holding the bottle has a building to cover in a shift that was scoped before two vacancies went unfilled.

This has a direct bearing on chemistry selection, in three ways that a specification sheet will not show you.

• Cost per litre decides frequency. When solution is expensive, it gets rationed — smaller volumes, lighter application, surfaces skipped. When it is cheap and on tap, the high-touch round gets done properly. This is the single biggest practical effect of onsite generation in a school.
• Dilution steps get skipped or guessed. A concentrate that must be measured is a concentrate that will sometimes be measured wrong, usually weak. Solution delivered at use strength removes that variable entirely.
• Unpleasant products get avoided. Quietly, without anyone reporting it. If a custodian finds a chemical harsh, the cleaning happens with less of it or after everyone has gone home.

Build the programme around what a short-staffed team can sustain on an ordinary Tuesday, not around what is achievable in the week after an inspection. A shorter list of surfaces genuinely cleaned every day beats a longer list cleaned when there is time.

Outbreak response in a school

Schools do not have an escalation protocol in the way a hospital or a cruise ship does, and they generally should. The sequence that works is simple enough to be followed by whoever is on shift.

Two points that districts consistently get wrong. Exclusion rules matter more than cleaning — a child returned to class too early after a norovirus episode undoes a great deal of custodial work. And absence data is the best early-warning signal a school has; someone should be looking at it weekly rather than noticing a pattern after a fortnight.

How districts actually buy this

A generator is a capital purchase in a sector that buys consumables, and that is a procurement problem before it is a financial one. The routes that work:

• Purchasing co-operative or existing contract vehicle, which is how most districts prefer to buy and which avoids a standalone bid process.
• Pilot in one building funded from the operating budget, with the district-wide case built on measured results rather than a projection.
• Capital or facilities budget, where a generator competes on the same footing as other equipment rather than against consumables.
• Leasing, which converts the capital cost into an operating cost that can be set directly against the chemical line it replaces. Available to US businesses; see leasing.

Whichever route, the business case needs to survive a public board meeting, which means conservative numbers, a clear statement of what is not claimed, and a straight answer to “what are you spraying near my child?”. The district ROI page sets out the model.

Shared devices, and the question nobody answers

A modern classroom hands the same tablet or Chromebook to five or six different children a day, which makes it one of the highest-contact surfaces in the building and one of the least consistently cleaned. Districts rarely have a written answer for it.

The constraint is not microbiological but material. Screens carry oleophobic coatings, keyboards and ports admit liquid, and device warranties frequently specify what may and may not be used. So the sequence is: read the manufacturer’s cleaning guidance for the specific devices you own, choose a method that fits it — usually a lightly dampened cloth rather than a spray, never liquid applied directly to a device — and write that into the procedure so it does not depend on the individual teacher. Then decide who owns the task, because “everyone” reliably means nobody. Where devices are carted and charged centrally, the cart is the natural point to do it.

What it does not fix

• It is not a cleaner. Soil comes off first. In classrooms and restrooms the detergent step is what makes the sanitising step meaningful.
• It does not replace ventilation. For respiratory transmission, air handling and case management do more than any surface programme.
• It does not replace hand hygiene. Norovirus moves on hands, and schools are hand-transmission environments above all else.
• It is not effective against everything. Cryptosporidium in particular resists chlorine-based chemistry.
• It carries no label claims. Where the district’s health procedures or a state rule specify a registered disinfectant, use HOCl-AS200 per its label or whatever the procedure names.
• It does not fix a schedule nobody has time to run. If the policy assumes cleaning hours the district does not staff, the policy is the problem.

White paper

Onsite Hypochlorous Acid in Schools and Campuses sets out the safety case, the rules and the district cost case in fourteen pages: hypochlorous acid against quats, bleach and wipes on toxicity, storage and mixing; what the HOCl-AS200 label covers; and what onsite generation does not fix. More than 15 schools and campuses already produce their own solution with EcoloxTech systems. Open the paper or download the PDF.

The rest of this programme

This pillar is the overview. Six companion pages go deeper:

• Pathogens — norovirus, respiratory viruses, athletics and early-years organisms.
• Applications — classrooms, restrooms, cafeteria, gyms, buses and early years.
• vs. Chemicals — quats, bleach and wipes, judged on asthma, storage and custodial reality.
• Compliance & inspections — NSLP food safety, health inspections, IPM and green cleaning laws.
• ROI & savings — the district model, per building and centrally.
• Implementation & SOP — installing over a summer, training custodians, first year.

Frequently asked questions

The seven-part programme