Worldwide wastewater treatment observatory · 
France
Aguas SB Observatory · public data to understand water
WWTP SAINT-NAZAIRE OUEST
France · official identifier FR0444184S0010
102,000h-e design capacity (2022) · 142nd of 4,051 (tied with 1 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier FR0444184S0010 · reported size 102,000 h-e design capacity · received load 101,007 h-e · reported treatment: PST · data year 2022. 142nd of 4,051 records with reported size in the inventory of France (tied with 1 others); 0.10 % of the sum of those 4,051 records in h-e (sum of records, not national capacity); nearest inventoried plant at 11.1 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 | yes |
| Phosphorus removal | yes |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 47.2662, -2.2859 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: France
Regulatory framework of France · 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.
SCENARIO
Reference energy scenario for this load estimate · simulator engine
what this estimate is · Inputs: 101,007 p.e. of reported load; equivalent average load 101,057 p.e. with the reference profile of France (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 (14,646 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Saint-Brevin-les-Pins 2 - Le Bodon | 11.1 km | 4,500 | 3,291 | primary, secondary and tertiary |
| Saint-Brevin-les-Pins 1 - les Rochelets | 11.7 km | 21,670 | 10,141 | primary, secondary and tertiary |
| La Baule-Escoublac-Guerande Livery | 12.1 km | 178,000 | 87,739 | primary, secondary and tertiary |
| Saint-Nazaire Est | 13.7 km | 75,000 | 75,477 | primary, secondary and tertiary |
| Saint-Michel-Chef -Chef - la Princetière | 14.6 km | 52,500 | 24,096 | 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 SAINT-NAZAIRE OUEST report?
Reported size: 102,000 h-e design capacity. Received load: 101,007 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 SAINT-NAZAIRE OUEST?
Aguas SB simulator reference scenario for 101,007 p.e. of reported load: 3,165,061 kWh per year (31.3 kWh per p.e. of average load), with aeration as 60 % 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.