Worldwide wastewater treatment observatory · 
United Kingdom
Aguas SB Observatory · public data to understand water
WWTP WINDSOR, HAM ISLAND, OLD WINDSO STW"
United Kingdom · official identifier UKENTH_TWU_TP000152
40,900h-e design capacity (2018) · 375th of 1,875
European Environment Agency — Waterbase-UWWTD, data call 2019 (v07.01) · official identifier UKENTH_TWU_TP000152 · reported size 40,900 h-e design capacity · received load 39,096 h-e · reported treatment: PS · data year 2018. 375th of 1,875 records with reported size in the inventory of United Kingdom; 0.04 % of the sum of those 1,875 records in h-e (sum of records, not national capacity); nearest inventoried plant at 6.8 km · 3 within 10 km. Reported data with their source; estimates are not measurements of the plant.
Aguas SB does not manage this wastewater treatment plant.
WHAT THE DATA REPORT
Reported data official data · 2018
| Treatment | primary + secondary (as reported to the EEA: PS) · reported levels |
|---|---|
| Nitrogen removal | not reported |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 51.4652, -0.5662 precision reported by the source: level 2 what it means |
| Source and year | European Environment Agency — Waterbase-UWWTD, data call 2019 (v07.01) · dataset record |
REGULATORY REFERENCES
Referencia normativa: United Kingdom
Regulatory framework of United Kingdom. Individual applicability is not determined in this profile.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2018 | Treatment |
|---|---|---|---|---|
| Slough, Wood Stw" | 6.8 km | 239,901 | 210,491 | primary and secondary |
| Chertsey, Lyne Lane, Chertsey, Stw" | 7.2 km | 89,877 | 89,877 | primary and secondary |
| Iver , Iver, Bucks Stw" | 7.4 km | 10,815 | 10,815 | primary and secondary |
| Maidenhead, Braywick Road, Maid Stw" | 11.7 km | 87,588 | 84,314 | primary and secondary |
| Ascot Stw | 12.6 km | 31,053 | 27,390 | primary and secondary |
Distances are between reported coordinates; proximity does not establish a hydraulic connection.
QUESTIONS
Frequently asked questions about this plant
What capacity does WWTP WINDSOR, HAM ISLAND, OLD WINDSO STW" report?
Reported size: 40,900 h-e design capacity. Received load: 39,096 h-e. Units are retained without conversion.
What treatment is reported?
Treatment PS. Nitrogen, phosphorus and UV are shown only when explicitly reported.
SOURCE AND CORRECTIONS
Source
reported data · European Environment Agency — Waterbase-UWWTD, data call 2019 (v07.01) · data 2018 · edition 2019 · source licence: CC BY 4.0 · JSON for this plant · suggest a correction · catalogue 2026-11-06. Reported data, not a current inspection; no compliance judgements.