Worldwide wastewater treatment observatory · 
Netherlands
Aguas SB Observatory · public data to understand water
WWTP UWWTP WALCHEREN
Netherlands · official identifier NL21001
116,953h-e design capacity (2022) · 48th of 315
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier NL21001 · reported size 116,953 h-e design capacity · received load 115,116 h-e · reported treatment: PST · data year 2022. 48th of 315 records with reported size in the inventory of Netherlands; 0.55 % of the sum of those 315 records in h-e (sum of records, not national capacity); nearest inventoried plant at 6.8 km · 1 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 · 2022
| Treatment | primary + secondary + tertiary (more stringent) (as reported to the EEA: PST) · reported levels |
|---|---|
| Nitrogen removal | yes |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 51.4436, 3.6145 precision reported by the source: level 2 what it means |
| Source and year | European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · dataset record |
FUENTES PÚBLICAS
What public sources report
Documented milestones
- 2026-04-22 · On 22 April 2026, the application to amend the environmental permit conditions for Walcheren wastewater treatment plant was published. Province of Zeeland
Facts taken from public documents, with their date and link; an authorisation, a project or a planned capacity do not prove operation or quantities actually treated. Aguas SB editorial layer, lot L07; it does not change the official data.
REGULATORY REFERENCES
Referencia normativa: Netherlands
Regulatory framework of Netherlands · Directive (EU) 2024/3019: reported-capacity band 10,000 to 149,999 p.e.; obligations are set by agglomeration load, not by the capacity of this plant. Individual applicability is not determined in this profile.
SCENARIO
Reference energy scenario for this load estimate · simulator engine
what this estimate is · Inputs: 115,116 p.e. of reported load; equivalent average load 114,979 p.e. with the reference profile of Netherlands (hypothesis with reported load and reference profile; not a measurement). Open this scenario in the simulator · how it is calculated and what it is not.
Reference scenario computed on the server from the reported load and the country profile; an estimate, not a measurement. The simulator recomputes it when opened.
WATER THAT COULD RETURN
Reuse potential
what this estimate is · Volume estimated from the reported load (30,391 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Uwwtp Breskens | 6.8 km | 23,479 | 10,166 | primary, secondary and tertiary |
| Uwwtp Oostburg | 14.0 km | 8,463 | 7,966 | primary, secondary and tertiary |
| Uwwtp Camperlandpolder | 16.6 km | 19,779 | 8,966 | primary, secondary and tertiary |
| Uwwtp Retranchement | 18.5 km | 34,261 | 10,733 | primary, secondary and tertiary |
| Uwwtp Willem Annapolder | 22.2 km | 54,922 | 65,133 | primary, secondary and tertiary |
Distances are between reported coordinates; proximity does not establish a hydraulic connection.
QUESTIONS
Frequently asked questions about this plant
What capacity does WWTP UWWTP WALCHEREN report?
Reported size: 116,953 h-e design capacity. Received load: 115,116 h-e. Units are retained without conversion.
What treatment is reported?
Treatment PST. Nitrogen, phosphorus and UV are shown only when explicitly reported.
How much energy would a reference plant use with the load of UWWTP WALCHEREN?
Aguas SB simulator reference scenario for 115,116 p.e. of reported load: 4,217,860 kWh per year (36.7 kWh per p.e. of average load), with aeration as 52 % of consumption. Estimate with the country reference profile; not a measurement of the plant.
SOURCE AND CORRECTIONS
Source
reported data · European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · data 2022 · edition 2023 · 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.