Worldwide wastewater treatment observatory · 
Spain · País Vasco
Aguas SB Observatory · public data to understand water
WWTP Loiola
Donostia/San Sebastián · official identifier ES16200690005010E
628,000h-e design capacity (2022) · 27th of 2,166
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier ES16200690005010E · reported size 628,000 h-e design capacity · received load 627,997 h-e · reported treatment: PS · data year 2022. 27th of 2,166 records with reported size in the inventory of Spain; 0.62 % of the sum of those 2,166 records in h-e (sum of records, not national capacity); nearest inventoried plant at 12.5 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 | 43.3000, -1.9610 reported precision: indicative (>1 km) 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 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.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Uralde | 12.5 km | 92,247 | 76,800 | primary, secondary and tertiary |
| Iñurritza | 15.5 km | 65,095 | 38,500 | primary, secondary and tertiary |
| Atalerreka | 16.7 km | 121,250 | 116,581 | primary and secondary |
| Sanantonpe | 19.4 km | 6,360 | 4,440 | primary, secondary and tertiary |
| Bera | 21.4 km | 10,000 | 6,388 | 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 Loiola report?
Reported size: 628,000 h-e design capacity. Received load: 627,997 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.