River swimming in Slovenia: 2025 water quality
Slovenia reported 20 river bathing waters for the 2025 season. 40% were classified Excellent — 35.5 points below the 75.5% for all 49 bathing waters in the country — and 0 were Poor. 2 sites have been Excellent in every season from 2015 to 2025.
river bathing waters
Excellent in 2025
Poor in 2025
Season status: Today (6 November 2026) is outside the official bathing season (15 June – 31 August). Official monitoring is tied to the season (a first sample may be taken shortly before it opens), so there are no current official water-quality results now. The next season starts on 15 June 2027.
Find the nearest Excellent river to you →
Map of river bathing waters
How river bathing waters in Slovenia rated since 2015
Counts for the sites in today’s 2025 inventory; the Excellent share is calculated over classified sites only.
| Season | Classified | Excellent | Excellent share | Poor |
|---|---|---|---|---|
| 2025 | 17 | 8 | 47.1% | 0 |
| 2024 | 17 | 7 | 41.2% | 0 |
| 2023 | 16 | 9 | 56.3% | 0 |
| 2022 | 17 | 9 | 52.9% | 0 |
| 2021 | 17 | 11 | 64.7% | 1 |
| 2020 | 17 | 12 | 70.6% | 0 |
| 2019 | 17 | 9 | 52.9% | 0 |
| 2018 | 17 | 11 | 64.7% | 0 |
| 2017 | 17 | 6 | 35.3% | 0 |
| 2016 | 17 | 6 | 35.3% | 0 |
| 2015 | 17 | 4 | 23.5% | 0 |
Most consistent Excellent rivers
2 sites were Excellent in all eleven seasons. Ordered by the length of the unbroken Excellent run ending in 2025.
- KOPALNO OBMOČJE KOLPA, POBREŽJE–FUČKOVCI 11 seasons
- KOPALNO OBMOČJE SOČA PRI TOLMINU I 11 seasons
- KOPALNO OBMOČJE SOČA PRI ČEZSOČI 9 seasons
- KOPALNO OBMOČJE KOLPA, UČAKOVCI–VINICA 8 seasons
- KOPALNO OBMOČJE KOLPA, PRELESJE–KOT 6 seasons
- KOPALNO OBMOČJE KOLPA, RADENCI 3 seasons
- KOPALNO OBMOČJE KOLPA, DAMELJ 2 seasons
- KOPALNO OBMOČJE KRKA, ŽUŽEMBERK 1 season
Rivers rated Poor in 2025
None of the 20 river bathing waters in Slovenia was classified Poor in 2025.
Changes from 2024 to 2025
Improved (1)
- KOPALNO OBMOČJE KRKA, ŽUŽEMBERK Good → Excellent
Declined (0)
None.
Near which major cities?
Sites within 60 km (straight line) of a major city covered by our city guides:
- Trieste 6 river bathing waters within 60 km
- Zagreb 4 river bathing waters within 60 km
- Ljubljana 1 river bathing waters within 60 km
Rivers compared across Europe
| # | Country | Sites | Excellent | Poor |
|---|---|---|---|---|
| 1 | Germany | 37 | 73% | 0 |
| 2 | Czechia | 91 | 72.5% | 0 |
| 3 | Netherlands | 78 | 69.2% | 4 |
| 4 | Portugal | 118 | 43.2% | 8 |
| 5 | France | 444 | 41% | 62 |
| 6 | Poland | 100 | 40% | 10 |
| 7 | Spain | 164 | 35.4% | 28 |
| 8 | Hungary | 45 | 33.3% | 1 |
Countries with at least 30 river bathing waters. Networks differ in size and in how sites are designated, so this is a descriptive comparison, not a safety ranking.
Quick answers
- How many river bathing waters in Slovenia are rated Excellent?
- 8 of 20 (40%) in the 2025 EEA classification.
- Which rivers in Slovenia have the best long-term record?
- 2 sites were Excellent in every season from 2015 to 2025, for example KOPALNO OBMOČJE KOLPA, POBREŽJE–FUČKOVCI, KOPALNO OBMOČJE SOČA PRI TOLMINU I. See the full list.
- Can I check current conditions?
- The annual class is not a live status. Current results and bans are published on Kopalne vode (GOV.SI / ARSO). Each site page on BathingWaterFinder also shows a weather forecast, including heavy-rain warnings.
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