Worldwide wastewater treatment observatory · 
Latvia
Aguas SB Observatory · public data to understand water
WWTP NAI Ozolnieki
Latvia · official identifier LV200014
2,000h-e design capacity (2022) · 64th of 79 (tied with 2 others)
European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública) · official identifier LV200014 · reported size 2,000 h-e design capacity · received load 1,701 h-e · reported treatment: PS · data year 2022. 64th of 79 records with reported size in the inventory of Latvia (tied with 2 others); 0.10 % of the sum of those 79 records in h-e (sum of records, not national capacity); nearest inventoried plant at 6.1 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
| 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 | 56.6992, 23.7917 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: 1,701 p.e. of reported load; equivalent average load 1,700 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 (281 m³/day of reference), not measured or available for reclamation.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | Capacity (h-e) | Load 2022 | Treatment |
|---|---|---|---|---|
| Sia ""jelgavas Ūdens"", Lapsakalna Iela 22, Jelgava | 6.1 km | 77,036 | 32,273 | primary, secondary and tertiary |
| Sia ""olaines Ūdens Un Siltums"" | 10.9 km | 28,317 | 13,832 | primary, secondary and tertiary |
| Bai Jaunolaine | 15.5 km | 4,300 | 2,095 | primary and secondary |
| Iecavas C. Nai | 26.5 km | 9,275 | 2,588 | primary and secondary |
| Sia ""jūrmalas Ūdens"", Mežmalas 41, Jūrmala | 27.7 km | 35,400 | 29,299 | 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 NAI Ozolnieki report?
Reported size: 2,000 h-e design capacity. Received load: 1,701 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 NAI Ozolnieki?
Aguas SB simulator reference scenario for 1,701 p.e. of reported load: 80,490 kWh per year (47.3 kWh per p.e. of average load), with aeration as 69 % 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.