Worldwide wastewater treatment observatory · 
Portugal
Aguas SB Observatory · public data to understand water
WWTP Negrais
Portugal · official identifier PTAGL549tp01
2,110h-e design capacity (2022) · 520th of 527
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier PTAGL549tp01 · reported size 2,110 h-e design capacity · received load 3,900 h-e · reported treatment: PS · data year 2022. 520th of 527 records with reported size in the inventory of Portugal; 0.01 % of the sum of those 527 records in h-e (sum of records, not national capacity); nearest inventoried plant at 5.3 km · 7 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 | 38.8698, -9.2802 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 1,000 to 9,999 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: 3,900 p.e. of reported load; equivalent average load 3,900 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 (780 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Sabugo | 5.3 km | 2,500 | 2,500 | primary and secondary |
| Montelavar | 5.5 km | 18,000 | 8,500 | primary and secondary |
| Malveira | 5.8 km | 37,746 | 11,300 | primary, secondary and tertiary |
| Vila Verde | 7.7 km | 5,050 | 4,100 | primary and secondary |
| Cavaleira | 9.0 km | 9,000 | 5,000 | 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 Negrais report?
Reported size: 2,110 h-e design capacity. Received load: 3,900 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 Negrais?
Aguas SB simulator reference scenario for 3,900 p.e. of reported load: 183,658 kWh per year (47.1 kWh per p.e. of average load), with aeration as 72 % 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.