Worldwide wastewater treatment observatory · Portugal

Aguas SB Observatory · public data to understand water

WWTP Frielas

Portugal · official identifier PT7032853

700,000h-e design capacity (2022) · 3rd of 527

European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier PT7032853 · reported size 700,000 h-e design capacity · received load 320,200 h-e · reported treatment: PST · data year 2022. 3rd of 527 records with reported size in the inventory of Portugal; 4.0 % of the sum of those 527 records in h-e (sum of records, not national capacity); nearest inventoried plant at 5.2 km · 3 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

700,000h-e design capacity

320,200h-e received load (2022)

46 %reported load/capacity ratio (not hydraulic utilisation)

3rd of 527by reported size among the 527 records with a size in the inventory · 4.0 % of the sum of those records (sum of records, not national capacity) · the largest plants in the country · how it is calculated

Treatment	primary + secondary + tertiary (more stringent) (as reported to the EEA: PST) · reported levels
Nitrogen removal	not reported
Phosphorus removal	not reported
UV disinfection	yes
Status	active
Reported coordinates	38.8206, -9.1498 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

1999-06-08 · The Frielas wastewater treatment plant in Loures was inaugurated on 8 June 1999. Historical Archive of the Presidency of Portugal

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 L04; it does not change the official data.

REGULATORY REFERENCES

Referencia normativa: Portugal

Regulatory framework of Portugal · Directive (EU) 2024/3019: reported-capacity band 150,000 p.e. or more; 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

9,443,048reference kWh per year for this load

29.5kWh per h-e (average load) per year

1,416,457€ per year at 0.15 €/kWh

62 %share of energy used for aeration

what this estimate is · Inputs: 320,200 p.e. of reported load; equivalent average load 320,200 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

23.4estimated hm³ of treated water per year

tertiary treatment reporteda starting point for reclamation

what this estimate is · Volume estimated from the reported load (64,040 m³/day of reference), not measured or available for reclamation.

LOCATION

Portugal: this plant on the map

this plant on the map · regional directory.

NEARBY PLANTS

Nearby wastewater treatment plants

Plant	Distance	Capacity (h-e)	Load 2022	Treatment
S. Joao da Talha	5.2 km	170,000	130,000	primary and secondary
Beirolas	6.0 km	213,500	213,500	primary, secondary and tertiary
Bucelas	8.3 km	15,000	8,700	primary, secondary and tertiary
Chelas	10.2 km	255,000	150,000	primary, secondary and tertiary
Alcantara	11.2 km	756,000	661,500	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 Frielas report?

Reported size: 700,000 h-e design capacity. Received load: 320,200 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 Frielas?

Aguas SB simulator reference scenario for 320,200 p.e. of reported load: 9,443,048 kWh per year (29.5 kWh per p.e. of average load), with aeration as 62 % 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.