Worldwide wastewater treatment observatory · 
Portugal
Aguas SB Observatory · public data to understand water
WWTP Riachos
Portugal · official identifier PT7055446
16,137h-e design capacity (2022) · 163rd of 527
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier PT7055446 · reported size 16,137 h-e design capacity · received load 14,500 h-e · reported treatment: PST · data year 2022. 163rd of 527 records with reported size in the inventory of Portugal; 0.09 % of the sum of those 527 records in h-e (sum of records, not national capacity); nearest inventoried plant at 4.1 km · 8 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 | not reported |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 39.4202, -8.5092 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: 14,500 p.e. of reported load; equivalent average load 14,500 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 (2,900 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Entroncamento | 4.1 km | 25,000 | 23,400 | primary and secondary |
| Golega | 4.3 km | 6,500 | 4,100 | primary, secondary and tertiary |
| Torres Novas | 4.5 km | 34,931 | 32,800 | primary, secondary and tertiary |
| Vila Nova da Barquinha | 6.3 km | 10,793 | 6,000 | primary and secondary |
| Carregueira/Pinheiro Grande | 6.6 km | 7,178 | 4,400 | 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 Riachos report?
Reported size: 16,137 h-e design capacity. Received load: 14,500 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 Riachos?
Aguas SB simulator reference scenario for 14,500 p.e. of reported load: 636,684 kWh per year (43.9 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.