Worldwide wastewater treatment observatory · 
United Kingdom
Aguas SB Observatory · public data to understand water
WWTP CHOLSEY, CHOLSEY, WALLINGFORD, STW"
United Kingdom · official identifier UKENTH_TWU_TP000045
20,517h-e design capacity (2018) · 601st of 1,875
European Environment Agency — Waterbase-UWWTD, data call 2019 (v07.01) · official identifier UKENTH_TWU_TP000045 · reported size 20,517 h-e design capacity · received load 20,517 h-e · reported treatment: PS · data year 2018. 601st of 1,875 records with reported size in the inventory of United Kingdom; 0.02 % of the sum of those 1,875 records in h-e (sum of records, not national capacity); nearest inventoried plant at 4.4 km · 5 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 | 51.5806, -1.1485 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 |
|---|---|---|---|---|
| Benson, Henley Road, Benson, Ox Stw" | 4.4 km | 8,390 | 6,611 | primary and secondary |
| Goring, Goring, Oxon Stw" | 4.4 km | 7,805 | 7,567 | primary and secondary |
| Dorchester Stw (Oxon) | 6.5 km | 25,841 | 2,202 | primary and secondary |
| Didcot, Foxhall Road, Didcot, O Stw" | 8.3 km | 38,000 | 36,685 | primary and secondary |
| Culham, Culham, Clifton Hampden Stw" | 9.8 km | 4,381 | 4,171 | 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 CHOLSEY, CHOLSEY, WALLINGFORD, STW" report?
Reported size: 20,517 h-e design capacity. Received load: 20,517 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.