Worldwide wastewater treatment observatory · 
Switzerland
Aguas SB Observatory · public data to understand water
WWTP HERISAU(BACHWIS)
Switzerland · official identifier CH_WWTP_300102
34,000h-e design capacity (2022) · 121st of 705 (tied with 1 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier CH_WWTP_300102 · reported size 34,000 h-e design capacity · received load 30,192 h-e · reported treatment: PST · data year 2022. 121st of 705 records with reported size in the inventory of Switzerland (tied with 1 others); 0.21 % of the sum of those 705 records in h-e (sum of records, not national capacity); nearest inventoried plant at 4.2 km · 8 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 | 47.3936, 9.2637 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: 30,192 p.e. of reported load; equivalent average load 34,086 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 (10,175 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Waldstatt(Aueli) | 4.2 km | 3,400 | 2,159 | primary, secondary and tertiary |
| Flawil - Oberglatt | 5.1 km | 56,667 | 37,882 | primary, secondary and tertiary |
| St.Gallen - Au | 5.7 km | 66,000 | 72,176 | primary, secondary and tertiary |
| Teufen(Mühltobel) | 6.9 km | 10,833 | 7,574 | primary, secondary and tertiary |
| Urnaesch(Furt) | 7.8 km | 5,400 | 2,317 | 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 HERISAU(BACHWIS) report?
Reported size: 34,000 h-e design capacity. Received load: 30,192 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 HERISAU(BACHWIS)?
Aguas SB simulator reference scenario for 30,192 p.e. of reported load: 1,615,993 kWh per year (47.4 kWh per p.e. of average load), with aeration as 49 % 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.