Worldwide wastewater treatment observatory · 
Switzerland
Aguas SB Observatory · public data to understand water
WWTP Arosa (Molinis)
Switzerland · official identifier CH_WWTP_392103
2,000h-e design capacity (2022) · 457th of 705 (tied with 5 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier CH_WWTP_392103 · reported size 2,000 h-e design capacity · received load 516 h-e · reported treatment: PST · data year 2022. 457th of 705 records with reported size in the inventory of Switzerland (tied with 5 others); 0.01 % of the sum of those 705 records in h-e (sum of records, not national capacity); nearest inventoried plant at 3.6 km · 3 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 | not reported |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 46.8261, 9.6523 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 |
REGULATORY REFERENCES
Referencia normativa: Switzerland
Regulatory framework of Switzerland. Individual applicability is not determined in this profile.
SCENARIO
Reference energy scenario for this load estimate · simulator engine
what this estimate is · Inputs: 516 p.e. of reported load; equivalent average load 583 p.e. with the reference profile of Switzerland (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 (174 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Arosa (Lüen) | 3.6 km | 437 | 181 | primary, secondary and tertiary |
| Arosa (Langwies) | 4.0 km | 1,250 | 293 | primary, secondary and tertiary |
| Arosa | 6.2 km | 32,500 | 9,334 | primary, secondary and tertiary |
| Chur | 10.6 km | 133,333 | 67,699 | primary, secondary and tertiary |
| Luzein (Dalvazza) | 12.9 km | 7,250 | 4,713 | 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 Arosa (Molinis) report?
Reported size: 2,000 h-e design capacity. Received load: 516 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 Arosa (Molinis)?
Aguas SB simulator reference scenario for 516 p.e. of reported load: 36,632 kWh per year (62.8 kWh per p.e. of average load), with aeration as 52 % 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.