Straight Answers On Emptying, Grants And Inspections
Emptying, repairs, upgrades and percolation testing across Galway, Mayo, Roscommon, Sligo and Leitrim. Every figure on this site comes from the EPA, gov.ie or Citizens Information, and we say so when nobody publishes one.
The advice to empty a septic tank every year comes from the 2009 code, and it is still repeated all over the Irish web. The EPA replaced it in 2021 with a table based on how many people live in the house and how big the tank is.
A three-person household with a 3.5 cubic metre tank is on a four-year interval, not a one-year one. That is three pump-outs you may not need. Our de-sludging calculator runs the EPA's own table, including the route for when you do not know your tank's size.
De-sludging by a permitted waste collector, with the pump chamber done at the same time and a receipt you can keep. The EPA changed how often it needs doing — most Irish advice has not caught up.
Learn more →Failed an inspection, or holding an advisory notice? Remediation is scoped to the actual risk, not to modern standards — and a grant may cover most of it.
Learn more →New systems, secondary treatment and soil polishing filters, built to the EPA 2021 Code of Practice — including the options that work on slow western ground.
Learn more →Trial hole, percolation tests and a site characterisation report for planning. What the numbers mean, and what your options are if the ground drains too slowly.
Learn more →Emptying is the routine job. Upgrades, replacement and percolation testing are where the decisions and the grant money actually are. See all services.
By a permitted waste collector, with the pump chamber done at the same time and a receipt you keep for five years.
Trial hole, three percolation tests and a site characterisation report. The number that decides what can legally go on your ground.
Registration costs €50 and is required for every system in the country. Failing to register is an offence carrying a fine of up to €5,000 on conviction.
If your system is inspected and fails, the grant is worth 85% of the cost up to €12,000 — and a re-inspection, if you disagree with the finding, costs €20. Those four figures are statutory, and every one of them is on an official source.
Because the answers to the three questions that actually worry people are written down, and almost nobody puts them in one place.
Five counties. Each page covers what is specific to that one — published prices in Galway, the area-based grant schemes in Roscommon and Sligo, slow-draining ground in Leitrim.
Heavy clay and low-permeability subsoil are the defining fact across much of the west, and they used to rule a site out entirely.
Under the 2009 code anything slower than a percolation value of 75 was unsuitable. The 2021 Code added low-pressure pipe distribution up to 90 and drip dispersal up to 120. If a site was written off before June 2021, the rules it was judged against have changed.
What Can Go On Slow GroundYes. Every domestic waste water treatment system must be registered with your local authority. The fee is €50 and you can register and pay at protectourwater.ie. Failing to register is an offence carrying a fine of up to €5,000 on conviction. The old requirement to re-register every five years has been removed from the legislation, so an existing certificate remains valid, and a replacement system does not need to be re-registered.
Less often than most Irish advice still says. The 2009 code recommended emptying every year. The EPA replaced that in its 2021 Code of Practice with a table based on household size and tank volume — a three-person house with a 3.5 cubic metre tank is every four years. Where the tank volume is unknown, the Code says assume 2.5 cubic metres and work from occupancy alone.
Eighty-five per cent of the cost of works, up to a maximum of €12,000. That maximum rose from €5,000 on 1 January 2024, and the old requirement to have registered by 1 February 2013 was dropped at the same time. There are three separate schemes: one for works arising from a failed inspection and the advisory notice that follows, and two that apply only if your house is in a Prioritised Area for Action or a High Status Objective Catchment Area and the council has written to you confirming eligibility. Routine maintenance, servicing and de-sludging never qualify.
Local authorities inspect over 1,000 systems a year on behalf of the EPA under the National Inspection Plan 2022–2026, targeted at areas of greatest risk to groundwater, surface water or human health. You get at least ten working days’ notice. If the system is working properly you receive a certificate; if the inspector finds problems you receive an advisory notice within 21 days setting out the reasons, the works needed and the deadline. A re-inspection, if you disagree, costs €20.
It depends on the percolation value, and the answer changed in 2021. A conventional septic tank with a percolation area needs a value between 3 and 50. Under the old 2009 code anything slower than 75 was unsuitable. The 2021 Code added low-pressure pipe distribution, which works up to 90, and drip dispersal, which works up to 120. Above 120 the site cannot take a system discharging to ground at all. Only a site characterisation can tell you which case you are in.
No. This site puts homeowners in the west of Ireland in touch with operators who do. De-sludging in particular must be carried out by a contractor holding a waste collection permit, and you can check any operator yourself on the National Waste Collection Permit Office register at nwcpo.ie.
Leave a number and the county, and a permitted operator will come back to you. If you are holding an advisory notice, say so — it changes which grant scheme applies.
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