Worldwide wastewater treatment observatory · 
Spain · Navarra
Aguas SB Observatory · public data to understand water
WWTP ALSASUA-URDIAIN
Urdiain · official identifier ES15312400001010E
20,000h-e design capacity (2022) · 611th of 2,166 (tied with 31 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier ES15312400001010E · reported size 20,000 h-e design capacity · received load 9,268 h-e · reported treatment: PS · data year 2022. 611th of 2,166 records with reported size in the inventory of Spain (tied with 31 others); 0.02 % of the sum of those 2,166 records in h-e (sum of records, not national capacity); nearest inventoried plant at 5.0 km · 2 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 | 42.8961, -2.1371 reported precision: reliable (<=11 m) what it means |
| Source and year | European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · dataset record |
REGULATORY REFERENCES
Referencia normativa: Spain
Regulatory framework of Spain · 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.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Olazagutia | 5.0 km | 15,117 | 8,986 | primary and secondary |
| Etxarri-Aranatz | 6.4 km | 6,100 | 1,956 | primary and secondary |
| Arbizu-Lacunza | 10.5 km | 11,667 | 4,088 | primary and secondary |
| Araia | 14.5 km | 3,700 | 2,000 | primary and secondary |
| Gaikao | 20.4 km | 70,159 | 63,000 | 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 ALSASUA-URDIAIN report?
Reported size: 20,000 h-e design capacity. Received load: 9,268 h-e. Units are retained without conversion.
What treatment is reported?
Treatment PS. Nitrogen, phosphorus and UV are shown only when explicitly reported.
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.