Worldwide wastewater treatment observatory · 
Spain · Asturias
Aguas SB Observatory · public data to understand water
WWTP BAJO NALON
Soto del Barco · official identifier ES3330690411010E
36,000h-e design capacity (2022) · 426th of 2,166 (tied with 4 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier ES3330690411010E · reported size 36,000 h-e design capacity · received load 23,412 h-e · reported treatment: PS · data year 2022. 426th of 2,166 records with reported size in the inventory of Spain (tied with 4 others); 0.04 % of the sum of those 2,166 records in h-e (sum of records, not national capacity); nearest inventoried plant at 6.5 km · 1 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 | yes |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 43.5310, -6.0840 reported precision: approximate (~111 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 |
|---|---|---|---|---|
| Cudillero | 6.5 km | 13,745 | 4,782 | primary and secondary |
| Río Esqueiro | 11.8 km | 6,377 | 2,163 | primary, secondary and tertiary |
| Cubia | 14.7 km | 24,900 | 9,582 | primary and secondary |
| Maqua | 15.0 km | 250,817 | 187,915 | primary and secondary |
| Trubia | 21.5 km | 11,414 | 2,825 | 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 BAJO NALON report?
Reported size: 36,000 h-e design capacity. Received load: 23,412 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.