Worldwide wastewater treatment observatory · 
Switzerland
Aguas SB Observatory · public data to understand water
WWTP Monthey-CIMO
Switzerland · official identifier CH_WWTP_615300
360,000h-e design capacity (2022) · 8th of 705
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier CH_WWTP_615300 · reported size 360,000 h-e design capacity · received load 276,955 h-e · reported treatment: PST · data year 2022. 8th of 705 records with reported size in the inventory of Switzerland; 2.2 % of the sum of those 705 records in h-e (sum of records, not national capacity); nearest inventoried plant at 2.4 km · 10 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 | 46.2599, 6.9737 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 |
FUENTES PÚBLICAS
What public sources report
Documented milestones
- 1972 · The wastewater treatment plant receiving municipal and industrial wastewater from Monthey entered service. Council of State of the Canton of Valais
Other published data
| Mean annual volume treated reported in the 2022 cycle | 4,359,366 m³/year (2022) · source |
|---|
Facts taken from public documents, with their date and link; an authorisation, a project or a planned capacity do not prove operation or quantities actually treated. Aguas SB editorial layer, lot L02; it does not change the official data.
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: 276,955 p.e. of reported load; equivalent average load 312,669 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 (93,334 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Bex | 2.4 km | 9,625 | 6,699 | primary, secondary and tertiary |
| Troistorrents | 3.5 km | 13,417 | 5,097 | primary, secondary and tertiary |
| Ollon | 3.5 km | 13,750 | 7,585 | primary, secondary and tertiary |
| Collombey-Muraz | 3.8 km | 7,500 | 7,998 | primary, secondary and tertiary |
| Lavey-St-Maurice | 5.5 km | 10,000 | 6,024 | 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 Monthey-CIMO report?
Reported size: 360,000 h-e design capacity. Received load: 276,955 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 Monthey-CIMO?
Aguas SB simulator reference scenario for 276,955 p.e. of reported load: 10,124,399 kWh per year (32.4 kWh per p.e. of average load), with aeration as 55 % 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.