Worldwide wastewater treatment observatory · 
Latvia
Aguas SB Observatory · public data to understand water
WWTP Rojas c. NAI
Latvia · official identifier LV300339
6,250h-e design capacity (2022) · 42nd of 79
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier LV300339 · reported size 6,250 h-e design capacity · received load 2,053 h-e · reported treatment: PS · data year 2022. 42nd of 79 records with reported size in the inventory of Latvia; 0.30 % of the sum of those 79 records in h-e (sum of records, not national capacity); nearest inventoried plant at 27.4 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 | 57.5044, 22.8086 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: Latvia
Regulatory framework of Latvia · Directive (EU) 2024/3019: reported-capacity band 1,000 to 9,999 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: 2,053 p.e. of reported load; equivalent average load 2,051 p.e. with the reference profile of Latvia (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 (339 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Dundagas Nai | 27.4 km | 615 | 1,348 | primary and secondary |
| Talsu Pilsētas Bioloģiskās Nai | 34.4 km | 47,500 | 24,715 | primary, secondary and tertiary |
| Pu ""kandavas Pilsētas Komunālais Uzņēmums"" Lielā Iela 38 | 52.1 km | 10,000 | 1,896 | primary and secondary |
| Sia ""tukuma Ūdens"" | 63.1 km | 30,000 | 29,083 | primary, secondary and tertiary |
| Sia ""ūdeka"" Bnai | 74.5 km | 30,000 | 24,356 | 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 Rojas c. NAI report?
Reported size: 6,250 h-e design capacity. Received load: 2,053 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 Rojas c. NAI?
Aguas SB simulator reference scenario for 2,053 p.e. of reported load: 95,829 kWh per year (46.7 kWh per p.e. of average load), with aeration as 70 % 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.