Worldwide wastewater treatment observatory · 
Italy
Aguas SB Observatory · public data to understand water
WWTP CAGLIARI_LOC_IS_ARENAS
Italy · official identifier IT20000000000135
557,000h-e design capacity (2022) · 25th of 3,726
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier IT20000000000135 · reported size 557,000 h-e design capacity · received load 509,853 h-e · reported treatment: PST · data year 2022. 25th of 3,726 records with reported size in the inventory of Italy; 0.53 % of the sum of those 3,726 records in h-e (sum of records, not national capacity); nearest inventoried plant at 7.1 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 | yes |
| Phosphorus removal | yes |
| UV disinfection | yes |
| Status | active |
| Reported coordinates | 39.2216, 9.1599 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
- 2025-09-17 · Sardinia issued its environmental decision on the project to adapt the Is Arenas wastewater treatment plant for irrigation reuse. Region of Sardinia
Other published data
| Mean annual volume treated reported in the 2022 cycle | 42,551,849 m³/year (2022) · source |
|---|
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 L02; it does not change the official data.
REGULATORY REFERENCES
Referencia normativa: Italy
Regulatory framework of Italy · 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
what this estimate is · Inputs: 509,853 p.e. of reported load; equivalent average load 351,800 p.e. with the reference profile of Italy (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 (101,971 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Quartu_s_e_zone_a_mare_loc_foxi_1 | 7.1 km | 600 | 600 | primary, secondary and tertiary |
| Settimo_san_pietro_loc_is_carropus | 7.3 km | 5,500 | 6,231 | primary, secondary and tertiary |
| Quartu_s_e_zone_a_mare_loc_foxi_2 | 7.5 km | 400 | 400 | primary, secondary and tertiary |
| Quartu_s_e_zone_a_mare_complesso_alberghiero_setar | 8.3 km | 750 | 450 | primary, secondary and tertiary |
| Maracalagonis_loc_s_stefano | 8.3 km | 6,000 | 7,397 | 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 CAGLIARI_LOC_IS_ARENAS report?
Reported size: 557,000 h-e design capacity. Received load: 509,853 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 CAGLIARI_LOC_IS_ARENAS?
Aguas SB simulator reference scenario for 509,853 p.e. of reported load: 11,506,276 kWh per year (32.7 kWh per p.e. of average load), with aeration as 57 % 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.