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Amalgam separator regulations: what UK dental practices must have
If your practice uses amalgam, the separator on your suction system is not an accessory — it is a regulatory requirement with a specified performance standard, a servicing obligation and a paper trail attached. Three different bodies expect to see that paperwork. Here is what is actually required.
The short version
- Any practice using amalgam must have a separator installed.
- It must capture at least 95% of amalgam particles from wastewater.
- It must meet ISO 11143, the standard covering separator performance and testing.
- It needs annual servicing at minimum, and emptying before it reaches capacity.
- You need documented proof — of installation, servicing and waste collection.
- Amalgam waste is subject to waste duty of care, so the disposal chain matters too.
The 95% capture requirement
The central obligation comes from the Environmental Protection (Control of Mercury) Regulations: a practice using amalgam must install a separator rated to capture at least 95% of amalgam particles from its wastewater.
That figure is not arbitrary — it corresponds to the retention efficiency set out in ISO 11143, the international standard for amalgam separators, which defines both the requirement and the test methods used to demonstrate it.
The practical implication when specifying or replacing a unit: the separator needs to be one that meets the standard, and you should have documentation showing it does. "It came with the suction system" is not, on its own, evidence.
Who enforces it
This is where practices are sometimes caught out, because it is not a single regulator.
| Body | Interest |
|---|---|
| Environment Agency (England) | Environmental enforcement |
| Natural Resources Wales | Environmental enforcement |
| Scottish Environment Protection Agency | Environmental enforcement |
| Northern Ireland Environment Agency | Environmental enforcement |
| CQC | Expects documented compliance at inspection |
| GDC | Expects documented compliance |
The environmental regulator enforces the requirement itself. CQC and the GDC will expect to see that you can evidence it. Those are different questions, and a practice can satisfy the first while failing to demonstrate the second.
Servicing and emptying
Servicing is annual at minimum. Separately from that schedule, the contents need emptying before the unit reaches capacity — not when it is already full. A separator at capacity is no longer performing to the standard it was certified against, which is the entire point of having it.
Check your unit's own guidance, as many separators are specified for replacement or exchange on a 12-month basis or once the canister is full, whichever comes first.
The documentation is the compliance. Written proof of the tasks carried out at each service is what demonstrates you have met the requirement. If a separator has been serviced but nothing was issued in writing, you have the maintenance without the evidence — and at inspection those are not the same thing.
Duty of care: the part that continues after collection
Amalgam is hazardous waste, and UK waste legislation places a duty of care on the practice as the waste producer. That duty does not end when the container leaves the building.
In practice this means:
- Amalgam waste stored in separate, sealed containers suitable for the purpose.
- Transferred only to an authorised waste carrier.
- Accompanied by waste transfer documentation, which you retain.
- Use of encapsulated amalgam in the surgery.
The consignment paperwork sits alongside your separator servicing records. Together they are what a practice needs to show the whole chain has been handled properly, from capture through to authorised disposal.
Worth a ten-minute check. Can you currently produce: proof your separator meets the standard, a dated record of its last service, and waste transfer documentation for your amalgam collections? If any of the three is missing, that is the gap to close. Ask us if you want help working out where you stand.
How this connects to your suction system
The separator sits on your suction system, and the two are usually serviced together — but they are governed differently. Suction servicing is a manufacturer recommendation. Separator servicing is a regulatory obligation with documentation attached.
That distinction matters when you compare service contracts. A contract covering "annual suction service" does not necessarily include the separator, its certification, or the waste collection arrangements. Our guide to dental suction servicing covers the mechanical side, and the compliance calendar shows how both fit alongside your other statutory intervals.
Frequently asked
Does every practice need an amalgam separator?
Every practice using amalgam does. The separator must be rated to capture at least 95% of amalgam particles.
What standard must it meet?
ISO 11143, which sets the retention efficiency requirement and the test methods.
How often does it need servicing?
Annually at minimum, with emptying before capacity is reached. Written proof of the work is required.
Who checks?
The environmental regulator for your nation enforces the requirement; CQC and the GDC expect to see documented compliance.
Not certain your separator paperwork stacks up?
We service amalgam separators alongside suction systems for practices across the UK, and issue the written documentation you need to evidence compliance. Tell us what you have and we will tell you what is missing.
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