Worldwide wastewater treatment observatory · 
Greece
Aguas SB Observatory · public data to understand water
WWTP KARLOVASSI
Greece · official identifier EL412004019
12,217h-e design capacity (2022) · 143rd of 273
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier EL412004019 · reported size 12,217 h-e design capacity · received load 9,945 h-e · reported treatment: PST · data year 2022. 143rd of 273 records with reported size in the inventory of Greece; 0.08 % of the sum of those 273 records in h-e (sum of records, not national capacity); nearest inventoried plant at 16.7 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 | not reported |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 37.8042, 26.7149 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: Greece
Regulatory framework of Greece · 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: 9,945 p.e. of reported load; equivalent average load 9,944 p.e. with the reference profile of Greece (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 (1,760 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Kokkari | 16.7 km | 7,500 | 4,127 | primary, secondary and tertiary |
| Pythagorio | 24.5 km | 8,000 | 5,970 | primary, secondary and tertiary |
| Patmos | 56.5 km | 6,000 | 3,558 | primary and secondary |
| Leros | 73.9 km | 10,833 | 6,172 | primary, secondary and tertiary |
| Chios | 78.4 km | 32,500 | 30,000 | 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 KARLOVASSI report?
Reported size: 12,217 h-e design capacity. Received load: 9,945 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 KARLOVASSI?
Aguas SB simulator reference scenario for 9,945 p.e. of reported load: 422,539 kWh per year (42.5 kWh per p.e. of average load), with aeration as 51 % 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.