Worldwide wastewater treatment observatory · 
Croatia
Aguas SB Observatory · public data to understand water
WWTP Zadar-Centar
Croatia · official identifier HRUWWTP_0001171_001
100,000h-e design capacity (2022) · 5th of 115 (tied with 1 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier HRUWWTP_0001171_001 · reported size 100,000 h-e design capacity · received load 59,633 h-e · reported treatment: PS · data year 2022. 5th of 115 records with reported size in the inventory of Croatia (tied with 1 others); 2.3 % of the sum of those 115 records in h-e (sum of records, not national capacity); nearest inventoried plant at 5.7 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 (as reported to the EEA: PS) · reported levels |
|---|---|
| Nitrogen removal | not reported |
| Phosphorus removal | not reported |
| UV disinfection | not reported |
| Status | active |
| Reported coordinates | 44.1062, 15.2574 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: Croatia
Regulatory framework of Croatia · 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: 59,633 p.e. of reported load; equivalent average load 59,635 p.e. with the reference profile of Croatia (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 (11,927 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Bibinje-Sukošan | 5.7 km | 20,180 | 5,383 | primary |
| Kali | 6.2 km | not reported | 463 | not reported |
| Preko | 7.2 km | not reported | 1,696 | not reported |
| Ugljan | 13.4 km | not reported | 935 | not reported |
| Nin | 16.7 km | not reported | 1,800 | not reported |
Distances are between reported coordinates; proximity does not establish a hydraulic connection.
QUESTIONS
Frequently asked questions about this plant
What capacity does WWTP Zadar-Centar report?
Reported size: 100,000 h-e design capacity. Received load: 59,633 h-e. Units are retained without conversion.
What treatment is reported?
Treatment PS. Nitrogen, phosphorus and UV are shown only when explicitly reported.
How much energy would a reference plant use with the load of Zadar-Centar?
Aguas SB simulator reference scenario for 59,633 p.e. of reported load: 2,258,901 kWh per year (37.9 kWh per p.e. of average load), with aeration as 56 % 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.