Worldwide wastewater treatment observatory · 
Portugal
Aguas SB Observatory · public data to understand water
WWTP Sesimbra
Portugal · official identifier PT20341873
30,000h-e design capacity (2022) · 109th of 527 (tied with 3 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier PT20341873 · reported size 30,000 h-e design capacity · received load 19,100 h-e · reported treatment: PS · data year 2022. 109th of 527 records with reported size in the inventory of Portugal (tied with 3 others); 0.17 % of the sum of those 527 records in h-e (sum of records, not national capacity); nearest inventoried plant at 8.0 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 (as reported to the EEA: PS) · reported levels |
|---|---|
| Nitrogen removal | not reported |
| Phosphorus removal | not reported |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 38.4350, -9.1149 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 |
REGULATORY REFERENCES
Referencia normativa: Portugal
Regulatory framework of Portugal · 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: 19,100 p.e. of reported load; equivalent average load 19,100 p.e. with the reference profile of Portugal (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 (3,820 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Lagoa/ Meco | 8.0 km | 48,000 | 15,500 | primary, secondary and tertiary |
| Quinta do Conde | 16.6 km | 94,000 | 68,300 | primary, secondary and tertiary |
| Fernao Ferro | 17.8 km | 32,700 | 16,100 | primary, secondary and tertiary |
| Cucena | 19.6 km | 30,600 | 8,300 | primary, secondary and tertiary |
| Palmela/Auto Europa | 21.0 km | 50,000 | 21,000 | 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 Sesimbra report?
Reported size: 30,000 h-e design capacity. Received load: 19,100 h-e. Units are retained without conversion.
What treatment is reported?
Treatment PS. Nitrogen, phosphorus and UV are shown only when explicitly reported.
How much energy would a reference plant use with the load of Sesimbra?
Aguas SB simulator reference scenario for 19,100 p.e. of reported load: 833,807 kWh per year (43.7 kWh per p.e. of average load), with aeration as 49 % 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.