Well water treatment in Co. Meath

Private wells in Co. Meath

Meath has more homes on private water than most of Ireland. The 2022 Census counted 13,451 households on a private well or other private supply, 18.5% of the county and the sixth highest share in the State. Another 3,175 homes are on a group water scheme. The share is highest in the north and west: about 38% of homes in the Kells area and 34% around Trim, against under 4% in Navan town.

Nobody monitors a household well for you. It's classed as an exempted supply, so testing it and treating it is down to the owner. That's why every system we fit in Meath starts with a lab report.

What's usually in a Meath well

Hard water, almost everywhere

South and central Meath sits on Carboniferous limestone, the same rock as the Dublin basin. Rainwater soaks down through it and picks up calcium. The Geological Survey of Ireland (GSI) puts most Meath groundwater at 251 to 350 mg/L, with plenty over 350, which is hard to very hard. Around Athboy, Longwood and Moynalty the readings are at the top of that range. Expect scale in the kettle within weeks, furred-up immersion elements and blocked shower heads.

Iron and manganese

About half the Meath supplies the GSI sampled showed raised iron and manganese, some above the drinking water limit. It's mostly natural. The dark, shaly limestone known locally as Calp holds little oxygen, and that lets iron and manganese dissolve out of the rock. The GSI lists Curragha, Dunshaughlin, Ballivor, Longwood, Summerhill, Enfield, Clonard, Batterstown and Dunboyne among the places it turned up. You see it as orange or brown staining on sinks and toilets, black specks, and laundry that comes out tinged.

Bacteria

Where the soil over the rock is thin, as it is across much of the limestone, surface water reaches the well quickly. In the GSI's sampling of council boreholes, E. coli turned up at 8 of 34 sites and background coliforms at 14 more. Septic tanks, slurry spreading and farmyards are the usual sources. You can't see, smell or taste it, so a lab test is the only way to know. See our guide to bacteria in well water.

What we usually fit in Meath

Most Meath wells need the same core line, in this order, with stages left out if the report doesn't call for them:

1. Sediment filter to protect everything after it.
2. Iron and manganese filter, because both foul a softener if they reach it.
3. Water softener sized for very hard water.
4. UV disinfection if the report shows E. coli or coliforms, fitted last on the main line so the water reaching the lamp is clear.
5. Reverse osmosis at the kitchen tap for drinking water, if you want it.

A recent example near Ballivor: the lab report showed E. coli, iron, manganese and very hard water. We shock-chlorinated the well with household bleach first, then fitted a catalytic carbon filter, an iron-removing softener, UV disinfection and a reverse osmosis unit at the kitchen sink. On mains water and only bothered by limescale? See our water softener page for Co. Meath instead.

The well grant in Meath

Meath County Council runs the Domestic Private Well Grant. Water treatment can qualify, and the council inspects before any work starts, so apply first and fit second. Bring the council your lab report and our itemised quote. We'll tell you exactly which tests to ask the lab for: iron, manganese, hardness, pH, nitrate, E. coli and coliforms at the very least.