River basin
Water pollution in the Morava basin
- Sites in the 2025 yearbook
- 35
- Failed the standard (91%)
- 32
- Counted in the score
- 24
River basin overview
In the Morava basin the SHMÚ yearbook has 35 monitoring sites; in 2025, 32 of them (91%) failed the standard for at least one indicator. 24 are counted in the scores of the fishing districts.
Watercourse profile of Morava
SHMÚ sites from source to mouth
Watercourse profile from source to mouthnumber of unmet indicators in 2025 at SHMÚ sites
Show sites in the table (6)
- Hodonín, road bridgeriver km 100.31 indicator
- Brodskériver km 79.09 indicators
- mouth of the Myjava, aboveriver km 73.62 indicators
- Moravský Svätý Jánriver km 67.310 indicators
- road Devínska Nová Ves – Vysokáriver km 14.79 indicators
- Devínriver km 1.015 indicators
- standard not met
- no unmet standard
- site not in the yearbook
Year-by-year trend
Share of sites in the river basin that failed the standard
- 202241 of 5180%
- 202321 of 2391%
- 202430 of 3586%
- 202532 of 3591%
Fishing district map
Fishing districts in the “Danube river basin” by nearest SHMÚ site
Detailed filtersregion, district, riverbed, depth, shading, satellites, water chemistry and pollution, fish, geology
1445fishing districts
Map color
Loading map…
Move the map with two fingers. In full-screen mode one finger is enough.
lowerhigher
The color of the fishing district line shows the number of indicators that failed the standard at the nearest SHMÚ site (2025). Gray fishing districts have no site with the same watercourse name nearby. You can also switch the color to groundwater and treatment plants.
Worst sites in the river basin
Click to expand the history by year
Devínska Nová Ves, belowMláka, river km 0.57 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not mettotal phosphorus●standard not met●standard not met●standard not met●standard not metnitrates●standard not met●standard not met·standard met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metoctylphenol·standard met●standard not met·standard met·standard metSalts, pH and mineralsaluminium·standard met●standard not met●standard not met●standard not metcalcium●standard not met●standard not met●standard not met·standard metpH·standard met●standard not met·standard met·standard metBiology and bacteriasaprobic index of biosestone●standard not met●standard not met●standard not met●standard not metphytoplankton abundance·standard met●standard not met·standard met·standard metchlorophyll a·standard met●standard not met·standard met·standard metculturable microorganisms (22 °C)·standard met●standard not met·standard met·standard metintestinal enterococci·standard met●standard not met·standard met·standard metPAHs: 3 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene·standard met●standard not met●standard not met●standard not metbenzo(ghi)perylene·standard met●standard not met·standard met·standard metfluoranthene·standard met●standard not met·standard met·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Adamov, KopčanyUnínsky potok, river km 2.78 indicators in 2025
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)·standard met●standard not met●standard not met·standard metdissolved oxygen·standard met·standard met·standard met●standard not metNutrients and nitrogennitrites·standard met●standard not met●standard not met●standard not mettotal phosphorus·standard met●standard not met●standard not met●standard not metammonium·standard met●standard not met·standard met●standard not metnitrates·standard met●standard not met●standard not met·standard mettotal nitrogen·standard met●standard not met·standard met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metchlorpyrifos●standard not met·standard met·standard met·standard metSalts, pH and mineralsconductivity·standard met●standard not met●standard not met●standard not metcalcium·standard met●standard not met●standard not met●standard not metpH·standard met●standard not met·standard met·standard metBiology and bacteriachlorophyll a·standard met·standard met●standard not met·standard metPAHs: 1 substance (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene·standard met·standard met●standard not met·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Štrkovisko Unín
PohanskoDyje, river km 17.09 indicators in 2025
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)·standard met·standard met·standard met●standard not metNutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not mettotal phosphorus●standard not met●standard not met●standard not met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metSalts, pH and mineralspH●standard not met●standard not met●standard not met●standard not metmanganese·standard met●standard not met·standard met·standard metBiology and bacteriaphytoplankton abundance●standard not met●standard not met●standard not met●standard not metchlorophyll a●standard not met·standard met●standard not met●standard not metPAHs: 2 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metfluoranthene·standard met·standard met●standard not met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
ZohorMalina, river km 4.24 indicators in 2025
Indicator2022202320242025Oxygen and organic matterdissolved oxygen●standard not met●standard not met·standard met●standard not metNutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not mettotal phosphorus●standard not met●standard not met●standard not met·standard metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metSalts, pH and mineralspH·standard met●standard not met·standard met·standard metPAHs: 1 substance (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
The location of the site is only approximate (based on the water body).
HolíčKopčiansky kanál, river km 3.010 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metPFOS (perfluorooctane sulfonate)·standard met·standard met·standard met●standard not metSalts, pH and mineralspH●standard not met●standard not met·standard met·standard metaluminium·standard met●standard not met·standard met·standard metBiology and bacteriachlorophyll a●standard not met●standard not met●standard not met●standard not metsaprobic index of biosestone●standard not met●standard not met●standard not met●standard not metphytoplankton abundance●standard not met·standard met·standard met●standard not metPAHs: 5 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metfluoranthene●standard not met●standard not met●standard not met●standard not metbenzo(ghi)perylene●standard not met●standard not met●standard not met·standard metbenzo(b)fluoranthene·standard met·standard met·standard met●standard not metperylene·standard met·standard met·standard met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Morava, road Devínska Nová Ves – VysokáMorava, river km 14.79 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not mettotal phosphorus●standard not met●standard not met·standard met·standard metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metSalts, pH and mineralspH●standard not met●standard not met●standard not met●standard not metaluminium●standard not met●standard not met·standard met●standard not metBiology and bacteriaphytoplankton abundance●standard not met●standard not met●standard not met●standard not metchlorophyll a●standard not met●standard not met●standard not met●standard not metsaprobic index of biosestone·standard met●standard not met·standard met●standard not metPAHs: 3 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene·standard met●standard not met·standard met●standard not metfluoranthene·standard met●standard not met·standard met●standard not metbenzo(ghi)perylene·standard met●standard not met·standard met·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Morava č. 1, Morava č. 2
The location of the site is only approximate (based on the water body).
Moravský Svätý JánMorava, river km 67.310 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metPFOS (perfluorooctane sulfonate)·standard met·standard met·standard met●standard not metSalts, pH and mineralsaluminium●standard not met●standard not met●standard not met●standard not metpH●standard not met●standard not met·standard met●standard not metBiology and bacteriaphytoplankton abundance●standard not met●standard not met●standard not met●standard not metchlorophyll a●standard not met●standard not met●standard not met●standard not metsaprobic index of biosestone·standard met●standard not met·standard met●standard not metPAHs: 3 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metbenzo(ghi)perylene●standard not met●standard not met●standard not met·standard metfluoranthene·standard met●standard not met●standard not met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Morava č. 3, Morava č. 4, Morava č. 5
The location of the site is only approximate (based on the water body).
BrodskéMorava, river km 79.09 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metPFOS (perfluorooctane sulfonate)·standard met·standard met·standard met●standard not metSalts, pH and mineralsaluminium●standard not met●standard not met●standard not met●standard not metpH●standard not met●standard not met·standard met●standard not metBiology and bacteriaphytoplankton abundance●standard not met·standard met●standard not met●standard not metchlorophyll a●standard not met·standard met●standard not met●standard not metsaprobic index of biosestone·standard met●standard not met●standard not met·standard metPAHs: 3 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metfluoranthene●standard not met●standard not met●standard not met●standard not metbenzo(ghi)perylene·standard met●standard not met●standard not met·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Morava č. 6, Morava č. 7a, Morava č. 7b
The location of the site is only approximate (based on the water body).
KútyMyjava, river km 3.05 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not mettotal phosphorus●standard not met·standard met·standard met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met●standard not met●standard not met●standard not metSalts, pH and mineralspH●standard not met●standard not met·standard met●standard not metcalcium●standard not met●standard not met●standard not met·standard metPAHs: 1 substance (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met●standard not met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
The location of the site is only approximate (based on the water body).
Rudava, road bridge Malé Leváre-GajaryRudava, river km 4.14 indicators in 2025
Indicator2022202320242025Oxygen and organic mattertotal organic carbon·standard met·standard met●standard not met·standard metNutrients and nitrogennitrites●standard not met●standard not met●standard not met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)●standard not met·standard met●standard not met●standard not metSalts, pH and mineralspH·standard met●standard not met·standard met●standard not metaluminium·standard met·standard met●standard not met·standard metPAHs: 1 substance (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene·standard met●standard not met●standard not met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
The location of the site is only approximate (based on the water body).
Holíč, below the WWTPKyštor, river km 3.26 indicators in 2025
Indicator2022202320242025Oxygen and organic matterdissolved oxygen·standard met●standard not met–site not in the yearbook●standard not metCOD (chemical oxygen demand)·standard met·standard met–site not in the yearbook●standard not metNutrients and nitrogentotal phosphorus·standard met●standard not met–site not in the yearbook●standard not metammonium·standard met●standard not met–site not in the yearbook·standard metnitrites·standard met●standard not met–site not in the yearbook·standard metnitrates·standard met·standard met–site not in the yearbook●standard not mettotal nitrogen·standard met·standard met–site not in the yearbook●standard not metSalts, pH and mineralsconductivity·standard met●standard not met–site not in the yearbook●standard not metBiology and bacteriasaprobic index of biosestone·standard met●standard not met–site not in the yearbook·standard metPAHs: 1 substance (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met●standard not met–site not in the yearbook·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Štrkovisko Holíč
StudienkaRudava, river km 17.01 indicator in 2025
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)·standard met·standard met●standard not met·standard mettotal organic carbon·standard met·standard met●standard not met·standard metNutrients and nitrogennitrites●standard not met●standard not met·standard met·standard metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metSalts, pH and mineralspH·standard met●standard not met·standard met·standard metPAHs: 2 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene·standard met●standard not met·standard met·standard metbenzo(ghi)perylene·standard met●standard not met·standard met·standard metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
Nearest site for the fishing districts: Rudava č. 1, Rudava č. 1b, Rudava kanál
DevínMorava, river km 1.015 indicators in 2025
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)●standard not met·standard met·standard met·standard metNutrients and nitrogennitrites·standard met·standard met●standard not met●standard not mettotal phosphorus●standard not met·standard met·standard met·standard metHarmful organic substancesAOX (adsorbable organic halogens)·standard met·standard met●standard not met●standard not metPFOS (perfluorooctane sulfonate)·standard met·standard met·standard met●standard not metoctylphenol●standard not met·standard met·standard met·standard metSalts, pH and mineralsaluminium●standard not met·standard met●standard not met●standard not metpH·standard met·standard met·standard met●standard not metBiology and bacteriaphytoplankton abundance●standard not met·standard met●standard not met●standard not metchlorophyll a●standard not met·standard met●standard not met●standard not metcoliform bacteria●standard not met·standard met●standard not met●standard not metculturable microorganisms (22 °C)●standard not met·standard met●standard not met●standard not metthermotolerant coliform bacteria●standard not met·standard met●standard not met●standard not metintestinal enterococci●standard not met·standard met●standard not met●standard not metPAHs: 5 substances (not counted in the score)
Indicator2022202320242025PAHs (combustion and deposition)benzo(a)pyrene●standard not met·standard met●standard not met●standard not metfluoranthene●standard not met·standard met●standard not met●standard not metbenzo(b)fluoranthene·standard met·standard met·standard met●standard not metbenzo(ghi)perylene·standard met·standard met●standard not met·standard metperylene·standard met·standard met·standard met●standard not metPolycyclic aromatic hydrocarbons. The standard for benzo(a)pyrene is extremely low (0.17 ng/l), so most streams exceed it; the main sources are combustion and atmospheric deposition.
The location of the site is only approximate (based on the water body).
Senica, aboveTeplica, river km 7.54 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met·standard met·standard mettotal phosphorus·standard met·standard met·standard met●standard not metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metSalts, pH and mineralspH·standard met●standard not met·standard met●standard not metcalcium·standard met·standard met·standard met●standard not metSkalicaZlatnícky potok, river km 1.56 indicators in 2024
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)●standard not met–site not in the yearbook·standard met–site not in the yearbookdissolved oxygen●standard not met–site not in the yearbook·standard met–site not in the yearbookNutrients and nitrogennitrites●standard not met–site not in the yearbook●standard not met–site not in the yearbooknitrates·standard met–site not in the yearbook●standard not met–site not in the yearbooktotal nitrogen·standard met–site not in the yearbook●standard not met–site not in the yearbooktotal phosphorus●standard not met–site not in the yearbook·standard met–site not in the yearbookHarmful organic substancesAOX (adsorbable organic halogens)●standard not met–site not in the yearbook●standard not met–site not in the yearbookSalts, pH and mineralspH●standard not met–site not in the yearbook●standard not met–site not in the yearbookcalcium●standard not met–site not in the yearbook●standard not met–site not in the yearbookmanganese●standard not met–site not in the yearbook·standard met–site not in the yearbookBiology and bacteriaphytoplankton abundance●standard not met–site not in the yearbook·standard met–site not in the yearbookchlorophyll a●standard not met–site not in the yearbook·standard met–site not in the yearbooksaprobic index of biosestone●standard not met–site not in the yearbook·standard met–site not in the yearbookLábOliva, river km 2.01 indicator in 2025
Indicator2022202320242025Oxygen and organic matterdissolved oxygen·standard met●standard not met·standard met·standard metNutrients and nitrogenammonium·standard met●standard not met·standard met·standard metnitrites·standard met●standard not met·standard met·standard mettotal phosphorus·standard met●standard not met·standard met·standard metMetalsnickel●standard not met·standard met·standard met·standard metBiology and bacteriasaprobic index of biosestone·standard met●standard not met·standard met●standard not metNearest site for the fishing districts: Lábske jazero
Myjava, above (Turá Lúka)Myjava, river km 67.83 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met·standard met·standard metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metSalts, pH and mineralspH●standard not met●standard not met●standard not met●standard not metcalcium●standard not met●standard not met·standard met●standard not metThe location of the site is only approximate (based on the water body).
BrodskéK. Kúty-Brodské, river km 5.82 indicators in 2025
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met●standard not met·standard met·standard metHarmful organic substancesAOX (adsorbable organic halogens)·standard met●standard not met●standard not met●standard not metSalts, pH and mineralspH●standard not met●standard not met●standard not met●standard not metNearest site for the fishing districts: Štrkovisko Kúty
JakubovMalina, river km 19.64 indicators in 2023
Indicator2022202320242025Oxygen and organic matterCOD (chemical oxygen demand)●standard not met●standard not met–site not in the yearbook–site not in the yearbookNutrients and nitrogentotal phosphorus●standard not met●standard not met–site not in the yearbook–site not in the yearbookammonium●standard not met·standard met–site not in the yearbook–site not in the yearbooknitrites·standard met●standard not met–site not in the yearbook–site not in the yearbookSalts, pH and mineralspH·standard met●standard not met–site not in the yearbook–site not in the yearbookNearest site for the fishing districts: Štrkovisko Jakubov č. 1, Štrkovisko Jakubov č. 2
The location of the site is only approximate (based on the water body).
HolíčChvojnica, river km 3.25 indicators in 2024
Indicator2022202320242025Nutrients and nitrogennitrites●standard not met–site not in the yearbook●standard not met–site not in the yearbookHarmful organic substancesAOX (adsorbable organic halogens)●standard not met–site not in the yearbook●standard not met–site not in the yearbookSalts, pH and mineralspH●standard not met–site not in the yearbook●standard not met–site not in the yearbookconductivity●standard not met–site not in the yearbook●standard not met–site not in the yearbookcalcium●standard not met–site not in the yearbook●standard not met–site not in the yearbookBiology and bacteriaphytoplankton abundance●standard not met–site not in the yearbook·standard met–site not in the yearbookchlorophyll a●standard not met–site not in the yearbook·standard met–site not in the yearbookThe location of the site is only approximate (based on the water body).
- standard not met
- no unmet standard
- site not in the yearbook
Fishing districts near these sites
Fishing districts whose nearest SHMÚ site lies in this river basin
- Morava č. 3site Moravský Svätý Ján · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l10 indicators
- Morava č. 4site Moravský Svätý Ján · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l10 indicators
- Morava č. 5site Moravský Svätý Ján · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l10 indicators
- Morava č. 1site Morava, road Devínska Nová Ves – Vysoká · standard not met in 4 of 4 years · nitrates in the groundwater nearby 7.9 mg/l9 indicators
- Morava č. 2site Morava, road Devínska Nová Ves – Vysoká · standard not met in 4 of 4 years · nitrates in the groundwater nearby 7.9 mg/l9 indicators
- Morava č. 6site Brodské · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l9 indicators
- Morava č. 7asite Brodské · standard not met in 4 of 4 years · nitrates in the groundwater nearby 5.0 mg/l9 indicators
- Morava č. 7bsite Brodské · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l9 indicators
- Štrkovisko Unínsite Adamov, Kopčany · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l8 indicators
- Štrkovisko Holíčsite Holíč, below the WWTP · standard not met in 3 of 4 years · nitrates in the groundwater nearby 0.5 mg/l6 indicators
- Rudávkasite Rudávka, above the WWTP of Rohožník · standard not met in 1 of 4 years · nitrates in the groundwater nearby 16.5 mg/l5 indicators
- VN Rohožníksite Rudávka, above the WWTP of Rohožník · standard not met in 1 of 4 years · nitrates in the groundwater nearby 12.1 mg/l5 indicators
- Štrkovisko Jakubov č. 1site Jakubov · standard not met in 2 of 4 years · nitrates in the groundwater nearby 0.5 mg/l4 indicators
- Štrkovisko Jakubov č. 2site Jakubov · standard not met in 2 of 4 years · nitrates in the groundwater nearby 0.5 mg/l4 indicators
- Myjava č. 2bsite Myjava, below · standard not met in 1 of 4 years · nitrates in the groundwater nearby 4.2 mg/l4 indicators
- Myjava č. 2csite Myjava, below · standard not met in 1 of 4 years · nitrates in the groundwater nearby 7.9 mg/l4 indicators
- Myjava č. 3site Myjava, below · standard not met in 1 of 4 years · nitrates in the groundwater nearby 9.1 mg/l4 indicators
- Myjava č. 1site Dojč · standard not met in 1 of 4 years · nitrates in the groundwater nearby 0.5 mg/l3 indicators
- Myjava č. 2asite Prietrž, above · standard not met in 1 of 4 years · nitrates in the groundwater nearby 0.5 mg/l3 indicators
- Štrkovisko Kútysite Brodské · standard not met in 4 of 4 years · nitrates in the groundwater nearby 5.0 mg/l2 indicators
- Štrkovisko Brodskésite Brodské · standard not met in 2 of 4 years · nitrates in the groundwater nearby 15.0 mg/l2 indicators
- Rudava kanálsite Studienka · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Rudava č. 1site Studienka · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Rudava č. 1bsite Studienka · standard not met in 4 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Chvojnica č. 1site Hrtánkovci, road bridge · standard not met in 3 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Chvojnica č. 2site Hrtánkovci, road bridge · standard not met in 3 of 4 years · nitrates in the groundwater nearby 4.2 mg/l1 indicator
- Lábske jazerosite Láb · standard not met in 3 of 4 years · nitrates in the groundwater nearby 21.6 mg/l1 indicator
- OR Moravský Svätý Ján – dolnésite Moravský Svätý Ján · standard not met in 2 of 4 years1 indicator
- OR Moravský Svätý Ján – hornésite Moravský Svätý Ján · standard not met in 2 of 4 years1 indicator
- VN Brezovásite Bystrina, before Brezová pod Bradlom · standard not met in 1 of 4 years · nitrates in the groundwater nearby 7.9 mg/l1 indicator
- VN Koválovsite Dojč · standard not met in 1 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Štrkovisko Šaštín – Strážesite Šaštín Stráže, above · standard not met in 1 of 4 years · nitrates in the groundwater nearby 0.5 mg/l1 indicator
- Brezovský potok (Senica)site Osuské · standard not met in 2 of 4 years · nitrates in the groundwater nearby 7.9 mg/lno unmet standard
- VN Osuskésite Osuské · standard not met in 2 of 4 years · nitrates in the groundwater nearby 7.1 mg/lno unmet standard
- Zohorský kanál č. 1site Zohorský kanál, mouth into the Malina · standard not met in 1 of 4 years · nitrates in the groundwater nearby 7.9 mg/lno unmet standard
- Zohorský kanál č. 2site Zohorský kanál, mouth into the Malina · standard not met in 1 of 4 years · nitrates in the groundwater nearby 21.6 mg/lno unmet standard
- Kanál Kátovské jazerosite Kátov, above · standard not met in 0 of 4 years · nitrates in the groundwater nearby 0.5 mg/lno unmet standard
- Kanál Malina č. 1site Kuchyňa, below · standard not met in 0 of 4 years · nitrates in the groundwater nearby 7.9 mg/lno unmet standard
- Kanál Malina č. 2site Kuchyňa, below · standard not met in 0 of 4 years · nitrates in the groundwater nearby 0.5 mg/lno unmet standard
- Stupavský potok č. 1site Stupavský potok, above the WWTP of Borinka · standard not met in 0 of 4 years · nitrates in the groundwater nearby 11.7 mg/lno unmet standard
Showing 40 of 41 fishing districts, worst first.
What most often fails
Number of sites in the river basin that failed this indicator in 2025
- counted in the fishing district score
- shown, not counted in the score
Where the data come from and what they do not say
- Surface waters: yearbooks of the Slovak Hydrometeorological Institute (SHMÚ) Surface Water Quality for the years 2022 to 2025. We transcribed the list of sites and indicators that failed the standard under Government Regulation no. 269/2010 Coll. into a table in the plugin. Older yearbooks are in a different format and we did not include them.
- Groundwater: SHMÚ yearbooks Groundwater Quality, stations and indicators exceeded in 2017 to 2025 according to the drinking-water limits. The connection to the fishing district is only indirect.
- Groundwater, measured values: the public SHMÚ interface "Groundwater quality monitoring results". We have actually measured values (nitrates, ammonium, iron, chlorides, metals, pesticides, PFAS, solvents) for 758 stations; for each substance we take the highest value from the samples in 2025 (for stations without data for that year, from one of the two previous years). A value equal to the standard counts as an exceedance, as it does at SHMÚ.
- Treatment plants: register of wastewater treatment plants (VÚVH, EEA) from the "Points near fishing districts" file, that is, only plants within 2 km of the fishing district line. There are considerably more treatment plants in Slovakia.
What this data does not say. The yearbook lists the sites that failed the standard. A site missing from it is not proof of clean water, so the score of a fishing district is only ever lowered and never raised. We did not include industrial polluters (the National Pollution Register) in the list because the register was unavailable when the data was collected, and for wastewater treatment plants we list only those we found near the fishing districts. Only 31% of SHMÚ sites have an exact location, 47% have only an approximate location (based on the water body, so they count less near the districts) and 22% have no location at all, so we do not assign them to any district. We determine the distance, the match of the watercourse name and the ranking ourselves; the assignment is indicative.