Worldwide wastewater treatment observatory · Poland

Aguas SB Observatory · public data to understand water

WWTP Łomża

Poland · official identifier PLPL0030

191,200h-e design capacity (2022) · 52nd of 1,654

European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier PLPL0030 · reported size 191,200 h-e design capacity · received load 108,963 h-e · reported treatment: PST · data year 2022. 52nd of 1,654 records with reported size in the inventory of Poland; 0.36 % of the sum of those 1,654 records in h-e (sum of records, not national capacity); nearest inventoried plant at 22.1 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

191,200h-e design capacity

108,963h-e received load (2022)

57 %reported load/capacity ratio (not hydraulic utilisation)

52nd of 1,654by reported size among the 1,654 records with a size in the inventory · 0.36 % 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	53.1882, 22.0847 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

Population of the served area (Łomża): 62,300 inhabitants (2024, Polish Waters).

Documented milestones

2023-10-21 · The plant permit (BI.RUZ.4210.62.2023.MK) became final, according to the national report. Polish Waters

Other published data

Mean annual volume treated reported in the 2022 cycle	3,852,000 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 L04; it does not change the official data.

REGULATORY REFERENCES

Referencia normativa: Poland

Regulatory framework of Poland · 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

2,727,200reference kWh per year for this load

32.1kWh per h-e (average load) per year

409,080€ per year at 0.15 €/kWh

61 %share of energy used for aeration

what this estimate is · Inputs: 108,963 p.e. of reported load; equivalent average load 84,926 p.e. with the reference profile of Poland (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

4.3estimated hm³ of treated water per year

tertiary treatment reporteda starting point for reclamation

what this estimate is · Volume estimated from the reported load (11,768 m³/day of reference), not measured or available for reclamation.

LOCATION

Poland: 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
Miejska Oczyszczalnia Ścieków W Stawiskach	22.1 km	6,400	2,060	primary and secondary
Zambrów	23.2 km	53,667	23,872	primary, secondary and tertiary
Kolno	25.8 km	14,083	9,829	primary and secondary
Gminna Oczyszczalnia Ścieków W Lelisie	34.7 km	2,917	741	primary and secondary
Ostrołęka	37.7 km	150,000	74,156	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 Łomża report?

Reported size: 191,200 h-e design capacity. Received load: 108,963 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 Łomża?

Aguas SB simulator reference scenario for 108,963 p.e. of reported load: 2,727,200 kWh per year (32.1 kWh per p.e. of average load), with aeration as 61 % 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.