Worldwide wastewater treatment observatory · 
Spain · Navarra
Aguas SB Observatory · public data to understand water
WWTP CASTEJON
Castejón · official identifier ES15310700001010E
8,750h-e design capacity (2022) · 1074th of 2,166 (tied with 8 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier ES15310700001010E · reported size 8,750 h-e design capacity · received load 3,957 h-e · reported treatment: PS · data year 2022. 1074th of 2,166 records with reported size in the inventory of Spain (tied with 8 others); < 0.01 % of the sum of those 2,166 records in h-e (sum of records, not national capacity); nearest inventoried plant at 4.1 km · 4 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 | 42.1740, -1.6798 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 1,000 to 9,999 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 |
|---|---|---|---|---|
| Cadreita | 4.1 km | 21,583 | 7,838 | primary and secondary |
| Alfaro | 4.9 km | 40,000 | 14,710 | primary, secondary and tertiary |
| Valtierra-Arguedas | 8.4 km | 40,833 | 27,084 | primary and secondary |
| Milagro | 9.0 km | 36,666 | 13,503 | primary and secondary |
| Corella | 10.1 km | 30,000 | 15,721 | 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 CASTEJON report?
Reported size: 8,750 h-e design capacity. Received load: 3,957 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.