Worldwide wastewater treatment observatory · Croatia

Aguas SB Observatory · public data to understand water

WWTP Rijeka-Delta

Croatia · official identifier HRUWWTP_0001116_001

540,000h-e design capacity (2022) · 2nd of 115

European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier HRUWWTP_0001116_001 · reported size 540,000 h-e design capacity · received load 125,160 h-e · reported treatment: P · data year 2022. 2nd of 115 records with reported size in the inventory of Croatia; 12.4 % of the sum of those 115 records in h-e (sum of records, not national capacity); nearest inventoried plant at 7.8 km · 1 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

540,000h-e design capacity

125,160h-e received load (2022)

23 %reported load/capacity ratio (not hydraulic utilisation)

2nd of 115by reported size among the 115 records with a size in the inventory · 12.4 % of the sum of those records (sum of records, not national capacity) · the largest plants in the country · how it is calculated

Treatment	primario (as reported to the EEA: P) · reported levels
Nitrogen removal	not reported
Phosphorus removal	not reported
UV disinfection	not reported
Status	active
Reported coordinates	45.3216, 14.4432 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

1994-04-30 · Rijeka’s central wastewater treatment plant at Delta entered service with mechanical treatment. City of Rijeka

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: Croatia

Regulatory framework of Croatia · Directive (EU) 2024/3019: reported-capacity band 150,000 p.e. or more; 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

4,081,303reference kWh per year for this load

32.6kWh per h-e (average load) per year

612,195€ per year at 0.15 €/kWh

56 %share of energy used for aeration

what this estimate is · Inputs: 125,160 p.e. of reported load; equivalent average load 125,160 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

9.1estimated hm³ of treated water per year

tertiary treatment not reportedreclamation requires additional treatment

what this estimate is · Volume estimated from the reported load (25,032 m³/day of reference), not measured or available for reclamation.

LOCATION

Croatia: this plant on the map

this plant on the map · regional directory.

NEARBY PLANTS

Nearby wastewater treatment plants

Plant	Distance	Capacity (h-e)	Load 2022	Treatment
Kostrena	7.8 km	not reported	4,952	not reported
Opatija-Lovran-Ičići	12.0 km	58,282	27,153	primary
Kraljevica	12.8 km	not reported	2,147	not reported
Omišalj	15.8 km	9,200	4,917	primary
Jadranovo	17.2 km	500	1,136	primary and secondary

Distances are between reported coordinates; proximity does not establish a hydraulic connection.

QUESTIONS

Frequently asked questions about this plant

What capacity does WWTP Rijeka-Delta report?

Reported size: 540,000 h-e design capacity. Received load: 125,160 h-e. Units are retained without conversion.

What treatment is reported?

Treatment P. Nitrogen, phosphorus and UV are shown only when explicitly reported.

How much energy would a reference plant use with the load of Rijeka-Delta?

Aguas SB simulator reference scenario for 125,160 p.e. of reported load: 4,081,303 kWh per year (32.6 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.