Worldwide wastewater treatment observatory · Bulgaria

Aguas SB Observatory · public data to understand water

WWTP UWWTP Sofia

Bulgaria · official identifier BGWT68134_00_01

1,833,333h-e design capacity (2022) · 1st of 124

European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier BGWT68134_00_01 · reported size 1,833,333 h-e design capacity · received load 1,032,938 h-e · reported treatment: PST · data year 2022. 1st of 124 records with reported size in the inventory of Bulgaria; 21.4 % of the sum of those 124 records in h-e (sum of records, not national capacity); nearest inventoried plant at 7.6 km · 2 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

1,833,333h-e design capacity

1,032,938h-e received load (2022)

56 %reported load/capacity ratio (not hydraulic utilisation)

1st of 124by reported size among the 124 records with a size in the inventory · 21.4 % of the sum of those records (sum of records, not national capacity) · the largest plants in the country · how it is calculated

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	42.7563, 23.3698 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

2010-01-11 · The ministry announced that reconstruction work at Kubratovo would start on 12 January. Ministerio de Medio Ambiente y Agua de Bulgaria

Other published data

Mean annual volume treated reported in the 2022 cycle	110,457,335 m³/year (2022) · source

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: Bulgaria

Regulatory framework of Bulgaria · 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

26,375,908reference kWh per year for this load

34.0kWh per h-e (average load) per year

3,956,386€ per year at 0.15 €/kWh

54 %share of energy used for aeration

what this estimate is · Inputs: 1,032,938 p.e. of reported load; equivalent average load 774,703 p.e. with the reference profile of Bulgaria (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

113.1estimated hm³ of treated water per year

tertiary treatment reporteda starting point for reclamation

what this estimate is · Volume estimated from the reported load (309,881 m³/day of reference), not measured or available for reclamation.

LOCATION

Bulgaria: 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
Kanalizacia Sofia	7.6 km	not reported	not reported	not reported
Uwwtp Kv.Kremikovtzi - Sofia	8.2 km	42,500	315	primary and secondary
Uwwtp Kostinbrod	12.9 km	13,020	2,865	primary, secondary and tertiary
Kanalizacia Bozhurishte	14.0 km	not reported	not reported	not reported
Kanalizacia Petarch	20.5 km	not reported	not reported	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 UWWTP Sofia report?

Reported size: 1,833,333 h-e design capacity. Received load: 1,032,938 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 UWWTP Sofia?

Aguas SB simulator reference scenario for 1,032,938 p.e. of reported load: 26,375,908 kWh per year (34.0 kWh per p.e. of average load), with aeration as 54 % 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.