School leak detection in the South East
The South East holds more open schools than any other English region, spread across nineteen local authorities and served by six different water wholesalers.
15 engineers covering South East
Part of ADI’s 23-engineer team across England, Scotland and Wales. This is the total for the South East coverage area; individual county staffing and appointment availability are confirmed when booking.
ADI engineer coverage, checked 8 September 2026. See the counties served.
The school estate in the South East
- Open schools in the region
- 3,961
- Special and boarding schools
- 368 special, 203 boarding
- Schools in rural areas
- 1,055
- Academy trusts operating in the region
- 389
- Water wholesalers serving the region
- Southern Water, South East Water, Thames Water, Affinity Water, Portsmouth Water, SES Water
- Ground and water conditions
- Chalk downland and Wealden clays together, so one county can have hard water and highly shrinkable ground within a few miles.
- School building programmes in the region
- Heavy post-war and 1960s expansion around the new towns and commuter growth, plus a large independent sector occupying historic buildings.
- Largest school site by capacity
- Walton High, 3,000 places
Across 19 local authorities, teaching 1,462,932 pupils. By phase: primary 2,583, secondary 487, 16 plus 42, nursery 41, all-through 29, middle deemed secondary 4.
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
1,136 schools in the region have nursery classes attached, which is where most of the region's early years water use actually sits.
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
A rural school is more likely to sit at the end of a long private supply run, and a minority are on private water supplies rather than a mains connection.
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
1,497 academies, and 1,687 schools in total sit inside a trust. The largest by school count are Oxford Diocesan Schools Trust (46), Glf Schools (40), Kent Catholic Schools' Partnership (33).
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
Leakage allowance schemes are set by the wholesaler, but a school's account is with its retailer. Ask your retailer which wholesaler scheme applies, what evidence it needs, and what the repair deadline is, before you commission the repair.
Source: MOSL, Our members: trading parties in the non-household water market (opens in a new tab) ().
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
In Milton Keynes. A site of this size has a distribution network rather than a single supply run, which changes how a leak is isolated.
Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
The twelve regions arranged as a tile grid, shaded by open school count. the South East is outlined. Counts come from the four national school registers, not from an estimate.
What this means for a survey in the South East
The ground and water conditions above are the practical part. Hard water scales fittings and shortens the life of valves and mixers. Soft water is easier on scaling but less forgiving of some older metallic pipework. Shrinkable clay moves through a dry summer and pulls buried joints apart, and former coalfield ground settles differentially for decades after the workings closed.
None of that changes the sequence: measure at the meter, isolate to a branch, locate from the surface. It changes what we expect to find and where we look first.
Case studies from schools in the South East
None published yet. Rather than write a plausible-sounding example, this page says so. When ADI supplies a school in this region that is happy to be named, or happy to be described anonymously, it will appear here with the measured loss and what the repair involved.
Arranging a survey in the South East
Looking for a general leak detection company rather than a school specialist? Our sister directory lists leak detection companies across the South East. Both sites are published by the same people, which is disclosed on the about page of each.
Sources for this page
- Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().
- Source: MOSL, Our members: trading parties in the non-household water market (opens in a new tab) ().
Last reviewed . How this site sources and dates its figures.