Castle Chalk Pit
Inert
Castle Chalk Pit is a historic (closed) landfill site recorded by the Environment Agency near Potters Bar, Hertfordshire. It received inert waste between 1978 and 1988, covering about 6.01 hectares. Reference EAHLD10038, October 2025 data revision.
Full record
| EA reference | EAHLD10038 |
|---|---|
| Site name | Castle Chalk Pit |
| Address | South Mimms, Hertfordshire |
| Site operator | Not recorded |
| Licence holder | Salisbury Trust |
| Licence issued | 5 May 1978 |
| Licence surrendered | 11 April 1988 |
| First waste input | 5 May 1978 |
| Last waste input | 11 April 1988 |
| Area | 6.01 ha |
| Gas control | Not recorded |
| Leachate containment | Not recorded |
| Licensed site | Yes |
| EA area | North East TH |
| Grid reference | 522800, 202600 |
Source: Environment Agency Historic Landfill Sites dataset, October 2025 revision.
Boundary map
What these waste types mean
- Inert:
- builder's rubble, subsoil, concrete, brick. Doesn't decompose or generate gas; the lowest-concern category.
Other historic landfill sites nearby
- Hawkeshead LaneInert
- The Enterprise CentreWaste types not recorded
- Tollgate FarmInert
What this data does — and doesn't — cover
- Licensed-era records only. Waste licensing began in 1974. Older tips — especially small pre-war ones — are incompletely recorded, so absence from this data does not mean no landfill ever existed here.
- Not the contaminated-land register. Councils hold a separate register of land determined as contaminated. A historic landfill entry is not a contamination determination, and vice versa.
- Boundaries are indicative. Digitised at 1:10,000 scale; some are buffers around a point rather than surveyed edges.
- Not a substitute for a formal environmental search. If you're buying, your conveyancer's environmental search checks this and several other sources.
EA Historic Landfill dataset, October 2025 revision. More on the methodology page.