Watercourse

OR Žlutnica

fishing district: 1
fishing district length: 0.4km
region: Trnava Region

Blue line: course of the watercourse (approximate). Orthophoto mosaic of Slovakia © GKÚ Bratislava, CC BY 4.0Google Maps

By the water now

Conditions scoreCalculating from the current weather…

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Air–
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Air pressure–
Sunset16:19Nov, 0 % illuminated

Today on the OR Žlutnica watercourse

Fishing conditions score, the best window of the day and fishing districts from the best conditions

Average of the watercourse's fishing districts

28from 100

Low activity · average of one fishing district

The number in the header is an estimate for the middle of the watercourse based on weather and measurements. The average of the fishing districts also counts satellite data, shading and geology of each district.

Best window today

06:00–08:00

OR Žlutnica, window score 27.

The score is an estimate of conditions based on weather, water and surroundings, not a bite forecast. Recalculated at 07:04.

Map and fishing districts of the watercourse

The course of the watercourse and its fishing districts. You can switch the line color to today's conditions, quality or any other parameter.

Detailed filtersregion, district, riverbed, depth, shading, satellites, water chemistry and pollution, fish, geology

Region

River basin

District and local SRZ organization

1445fishing districts

Pick a category to narrow the selection. Next to each option you can see how many fishing districts remain.

Map color

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Move the map with two fingers. In full-screen mode one finger is enough.

Sort fishing districts

Elevation profile of the watercourse

How the watercourse falls downstream: fall, gradient and water speed.

Very slow watercourse A lowland, almost stagnant section: calm, often more turbid water; the bottom tends to be muddy and sandy. Typical of carp fishing districts.

Elevation profile of the watercourse: from 163 to 159 m a.s.l. over 0.4 km.

Fishing districts in order from the highest (left) to the lowest. There may be a section without a fishing district between districts; it is not displayed.

Highest point: 161 m a.s.l.
Lowest point: 161 m a.s.l.
Fall of the fishing districts: 0.1 m
Average slope: 0.3 ‰
Sinuosity: 1.01

Source: Open Topo Data (eudem25m), 4 Nov 2026. Gradient and fall are approximate and include only the sections of fishing districts.

Terrain in 3D

Loading the 3D terrain model…

Historical images

Changes in the surroundings and nature from 2017 to 2023: how the banks, vegetation and landscape around the water change. The images switch automatically; you can also browse them by hand.

Aerial image of watercourse OR Žlutnica from 2017 — **2017**imaged 24 Aug 2017

Aerial image of watercourse OR Žlutnica from 2020 — **2020**imaged 22 Aug 2020

Aerial image of watercourse OR Žlutnica from 2023 — **2023**imaged 14 Aug 2023

Orthophoto mosaic of Slovakia © GKÚ Bratislava, NLC Zvolen. The year and day of imaging depend on the location, so individual years may differ in season and weather.

Water pollution on the OR Žlutnica watercourse

Water quality according to SHMÚ, wastewater treatment plants near the fishing districts and groundwater nearby

Groundwater: measured valuestypical value from stations within 10 km, 2025

1 of 1 fishing district with measurements has groundwater nearby with a value above the limit for at least one indicator.

ammonium or nitrites above the standard at at least one station1

Polluted water in Slovakia

Source: SHMÚ (yearbooks on surface and groundwater quality), the register of wastewater treatment plants from VÚVH and the EEA. A SHMÚ site is assigned to a fishing district by the same watercourse name and by distance; the yearbook lists the sites that failed the standard, so a missing site is not proof of clean water.

Geology and geochemistry of the OR Žlutnica stream

Metals and gold in river sediments and water, old mine workings and deposits, boreholes with archive reports, geothermal energy, environmental burdens and landslides around the stream

The overview is based on public registers and atlases of the State Geological Institute of Dionýz Štúr. The search covers a zone around the water of all fishing districts of the stream (0 km of line in total): stream samples within 1 km, boreholes, mine workings and burdens within 3 km, ore occurrences within 5 km, geothermal sources within 10 km.

Water according to the atlas

pH 8.3modelled estimate

water type Ca–HCO₃–SO₄

Mineralisation 558 mg/l, hard water (17.8 °dH). Interpolation of measurements from the Geochemical Atlas of Slovakia, not a measurement in the stream.

Elements in river sediment

1 from 15elements in the top 10 %

highest: Copper 63.4 mg/kg

Position of the highest-ranked element among the sample points on streams in Slovakia: percentile 92. Interpolation of the Geochemical Atlas of river sediments.

Heat underfoot

35°C at 1,000 m depth

heat flow 50 mW/m²

At a depth of 2,000 m about 65 °C (increase of 30 °C per kilometre). Atlas of Geothermal Energy of Slovakia.

Natural gamma radiation

47nGy/h dose rate

percentile 22 in Slovakia

Natural background from rocks and soil (potassium, uranium, thorium), not a value measured at the water. Airborne gamma-ray spectrometry by ŠGÚDŠ.

Old mine workings

0objects within 3 km

No old mine working is recorded within 3 km of the water.

Gold in river sediment

0samples with gold

No gold was found in river sediment samples within 1 km of the water. The samples do not cover every stream, so this does not mean there is no gold here.

Trace elements in the stream water

–

There is no measurement in the surface water atlas samples within 1 km of the water.

Boreholes and groundwater analyses

29boreholes within 3 km

25 water analyses nearby

Of these, 29 have an archive report from Geofond. The boreholes are hydrogeological, geological, engineering-geological and other.

Geothermal energy

–

2 geothermal and mineral water springs within 10 km.

Environmental burdens and landfills

4sites within 3 km

4 landfills

No environmental burden is registered within 3 km; landfills are only recorded.

Deposits and ore occurrences

0records within 5 km

Geofond registers, the metallogenetic map and the mineral resources map.

Landslides and slope deformations

0areas within 3 km

Documented landslides in the Geofond register. A landslide into a stream can cloud the water and change the bed.

Hydrogeology: aquifers and groundwater

Streams and rivers are fed by groundwater. Hydrogeological maps show in which rocks the water is stored, how permeable they are and what the water in them is like. The data come from ŠGÚDŠ maps, not from measurements at a particular water.

Main hydrogeological region

Quaternary of the Morava up to Brodské100%SR 0.0 %

marker on the bar: share among all sample points on streams in Slovakia

Surface water chemistry according to the atlas

Modelled composition of the water in the area the fishing district line runs through. The rasters of the Geochemical Atlas of Slovakia (surface waters) are an interpolation of measurements in sampled streams, so they show the typical background of the area, not a measurement in a particular stream.

Water acidity

pH 8.33typical range

Most rivers and streams in Slovakia have a pH of 6.5 to 8.5. More acidic water is found in streams on acidic rocks (granites, quartzites), more alkaline water near limestones.

Water hardness

17.8°dH, hard

Sum of calcium and magnesium (3.17 mmol/l). Hard water is buffered and its pH changes more slowly; soft water is more sensitive to acid rain.

Dissolved substances

558mg/l mineralisation

Total amount of dissolved minerals. Clean mountain water has tens of mg/l, lowland and limestone waters hundreds.

Ionic composition of the water

Cations (positive ions)

Ca 58Mg 23Na+K 19

Anions (negative ions)

HCO₃ 63SO₄ 26Cl 12

Water type by dominant ions: Ca–HCO₃–SO₄

Shares are in equivalents, the usual way of comparing the composition of waters.

Major ions

PotassiumK9.47 mg/lpercentile 91
SodiumNa28.0 mg/lpercentile 88
SulphatesSO489.8 mg/lpercentile 86
CalciumCa91.2 mg/lpercentile 81
ChloridesCl29.8 mg/lpercentile 80
MagnesiumMg21.9 mg/lpercentile 71
BicarbonatesHCO3277 mg/lpercentile 70
FluoridesF0.123 mg/lpercentile 54

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

Nutrients and organic pollution

AmmoniumNH40.382 mg/lpercentile 82
PhosphatesPO40.421 mg/lpercentile 76
Chemical oxygen demandChSK4.42 mg/lpercentile 74
NitratesNO310.1 mg/lpercentile 73

Metals

ZincZn25.0 μg/lpercentile 91
ManganeseMn40.6 μg/lpercentile 57
AluminiumAl33.2 μg/lpercentile 32
IronFe0.0552 mg/lpercentile 25

Elements in river sediments

The Geochemical Atlas of Slovakia (river sediments) describes what the river carries in the fine material on its bed. Sediment collects metals from rocks, ore occurrences and past mining and industry. It is not a legal limit or a health risk assessment: it shows how an element on this stream ranks among streams in Slovakia.

Potentially toxic and trace elements

CopperCu63.4 mg/kgpercentile 92
CadmiumCd0.441 mg/kgpercentile 83
ChromiumCr101 mg/kgpercentile 82
MercuryHg0.169 mg/kgpercentile 70
ZincZn119 mg/kgpercentile 68
SeleniumSe0.318 mg/kgpercentile 66
CobaltCo9.37 mg/kgpercentile 64
NickelNi26.6 mg/kgpercentile 59
ArsenicAs6.97 mg/kgpercentile 54
BismuthBi0.213 mg/kgpercentile 48
MolybdenumMo0.324 mg/kgpercentile 39
VanadiumV61.5 mg/kgpercentile 33
LeadPb10.9 mg/kgpercentile 19
TinSn1.69 mg/kgpercentile 10
AntimonySb0.255 mg/kgpercentile 6

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

Major elements (iron, aluminium, calcium, magnesium, potassium, sodium, titanium, manganese, phosphorus)

PhosphorusP1,207 mg/kgpercentile 84
CalciumCa3.71 %percentile 72
PotassiumK1.63 %percentile 67
ManganeseMn829 mg/kgpercentile 48
IronFe2.52 %percentile 40
TitaniumTi4,182 mg/kgpercentile 39
AluminiumAl5.28 %percentile 38
MagnesiumMg0.716 %percentile 28
SodiumNa0.707 %percentile 19

Further elements (barium, strontium, lithium, rubidium, zirconium, yttrium, cerium, boron, beryllium, gallium)

ZirconiumZr495 mg/kgpercentile 78
GalliumGa17.3 mg/kgpercentile 77
CeriumCe64.8 mg/kgpercentile 68
RubidiumRb94.1 mg/kgpercentile 65
StrontiumSr144 mg/kgpercentile 56
LithiumLi29.9 mg/kgpercentile 52
BariumBa415 mg/kgpercentile 42
YttriumY25.6 mg/kgpercentile 38
BerylliumBe1.07 mg/kgpercentile 31
BoronB53.3 mg/kgpercentile 30

Natural radioactivity and radon

Airborne gamma-ray spectrometry by ŠGÚDŠ measures radiation from potassium, uranium and thorium in rocks and soil. Granites and some acidic volcanic rocks have the highest values, limestones and floodplains the lowest. Caesium-137 is a remnant of fallout from the Chernobyl accident and nuclear weapons tests.

Gamma radiation dose rate

47nGy/h in air

Natural background from rocks and soil; higher over granites and some acidic volcanic rocks, lower over limestones and floodplains.

Potassium (K)K1.28 %percentile 40
Equivalent thorium (eTh)eTh6.85 ppm28th percentile
Equivalent uranium (eU)eU2.22 ppm16th percentile

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

Geophysical fields: magnetics and gravity

Maps of the magnetic field and gravity (ŠGÚDŠ) reveal what lies beneath the sediments and the surface: volcanic bodies, faults and crustal thickness. For an angler they are interesting indirectly: they show where the bedrock changes, and with it the water.

Magnetic anomaly

+95nT

range 95 to 95 nT

Deviation of the Earth's magnetic field from its surroundings. Positive and negative anomalies reveal rocks with magnetite (basalts, basic volcanic rocks) and boundaries in the bedrock.

Geothermal potential

The Atlas of Geothermal Energy of Slovakia records rock temperature and heat flow from the Earth's interior. It is the potential of the area, not the actual warmth of the water in the stream. Specific geothermal boreholes and springs near this water are in the geothermal energy section below.

Rock temperature with depth

35 / 65 °Cat depths of 1,000 and 2,000 m

increase of 30 °C per km

The line shows the rock temperature; the dotted part is only an extension to the surface. Heat flow 50 mW/m².

Relief, climate and soils

A basin is not just water: slope and elevation determine the speed of runoff, climate the temperature and amount of water, and soils what is washed into the stream. The data come from the geomorphological division, climatic-geographical types and soil maps of ŠGÚDŠ.

Susceptibility of soils to acidification

soils susceptible to acidification100%SR 31 %

marker on the bar: share among all sample points on streams in Slovakia

Map of the corridor

Where the nearest mine workings, deposits, burdens, geothermal boreholes and gold finds are. Groups can be switched off.

Environmental burdens 4Geothermal energy 2Boreholes and springs 25

The line is the water of the fishing district, the light band is the 3 km zone in which boreholes, mine workings and burdens were searched for. The map shows the nearest objects (at most a few dozen from each register), not all of them. The points correspond to the position in the register; area objects are marked by their centre.

Groundwater: chemistry, water types and radioactivity

Hydrogeochemical objects (analyses of springs and boreholes), the geochemical atlas of groundwater (1996) and radiohydrochemical sampling. Groundwater feeds streams, so its composition also affects the water in the stream.

Metals in groundwater

CopperCuextreme (top 1 %)
highest 91.0 μg/lmedian 47.7 μg/l2 samples
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 1.8 km from the water. Comparison: percentile 99 of all samples in Slovakia.
LithiumLihigh (top 5 %)
highest 90.0 μg/lmedian 49.0 μg/l2 samples
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 97 of all samples in Slovakia.
MercuryHghigh (top 5 %)
highest 0.300 μg/lmedian 0.250 μg/l2 samples
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 96 of all samples in Slovakia.
LeadPbelevated (top 10 %)
highest 2.00 μg/lmedian 1.50 μg/l2 samples
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 1.8 km from the water. Comparison: percentile 90 of all samples in Slovakia.
AntimonySbslightly elevated
highest 0.300 μg/lmedian 0.200 μg/l2 samples50 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 1.8 km from the water. Comparison: percentile 87 of all samples in Slovakia.
ZincZnslightly elevated
highest 272 μg/lmedian 185 μg/l2 samples
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 1.8 km from the water. Comparison: percentile 81 of all samples in Slovakia.
ChromiumCrtypical value
highest 0.500 μg/lmedian 0.375 μg/l2 samples50 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 66 of all samples in Slovakia.
IronFetypical value
highest 0.00500 mg/lmedian 0.00500 mg/l2 samples100 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 50 of all samples in Slovakia.
CadmiumCdbelow half of Slovakia
highest 0.250 μg/lmedian 0.250 μg/l2 samples100 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 47 of all samples in Slovakia.
SeleniumSebelow half of Slovakia
highest 0.500 μg/lmedian 0.500 μg/l2 samples100 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 39 of all samples in Slovakia.
ArsenicAsbelow half of Slovakia
highest 0.500 μg/lmedian 0.500 μg/l2 samples100 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 38 of all samples in Slovakia.
AluminiumAlbelow half of Slovakia
highest 0.00500 mg/lmedian 0.00500 mg/l2 samples100 % below the limit of quantification
1. up to 50 %
2. 50–75
3. 75–90
4. 90–99
5. above 99
Highest value: studňa1993, 2.1 km from the water. Comparison: percentile 30 of all samples in Slovakia.

Radon in waters

Type of site	Samples	Highest radon	Median
well	1	13,2 Bq/l	13.2 Bq/l

Boreholes and Geofond archive reports

Register of hydrogeological boreholes, other boreholes and geothermal boreholes. Each borehole has a report in the Geofond archive (geological profiles, pumping tests, chemical analyses of the water); the report number is in the table.

29 boreholes in the 3 km zone, of which 14 hydrogeological and 15 other; with an archive report number 29.

Borehole depths

up to 10 m20×
10–30 m7×
30–100 m0×
100–300 m1×
over 300 m0×

Nearest boreholes

Site	Type	Depth	Archive report	From the water
P-1	hydrogeological	6.0 m	`16490`	1.3 km
Holíč	narrow-diameter borehole with ordinary drinking and process water	8.8 m	`17458` 119Ad20.pdf	1.5 km
Holíč	narrow-diameter borehole with ordinary drinking and process water	9.5 m	`17458` 119Ad21.pdf	1.8 km
Holíč	narrow-diameter borehole with ordinary drinking and process water	7.7 m	`17458` 119Cb6.pdf	2.4 km
JV-8	engineering-geological	10.0 m	`84570`	2.4 km
Skalica	narrow-diameter borehole with ordinary drinking and process water	9.0 m	`16490` 119Ad12.pdf	2.4 km
HV-8	hydrogeological	9.0 m	`16490`	2.5 km
S-2	hydrogeological	8.0 m	`6480`	2.5 km
Holíč	narrow-diameter borehole with ordinary drinking and process water	9.0 m	`17458` 119Cb5.pdf	2.6 km
V-1	engineering-geological	9.0 m	`97953`	2.7 km
V-2	engineering-geological	6.0 m	`97953`	2.7 km
Skalica	narrow-diameter borehole with ordinary drinking and process water	12.0 m	`16490` 119Ad8.pdf	2.7 km

Geothermal energy and mineral waters

Geothermal boreholes (wellhead water temperature, yield, chemical type) and sources of geothermal and mineral waters within 10 km. Data on the use and existence of a borehole come from the Geofond register.

Sources of geothermal and mineral waters

Source	Type	Water temperature (°C)	Yield (l/s)	Count	Nearest from water
category a1	mineral water	< 15	< 5	2	7.1 km

Environmental burdens, landfills and anthropogenic sediments

Recorded environmental burdens (industrial sites, landfills, mining), the register of waste landfills and monitoring of anthropogenic sediments (industrial sludge). It is a list of places, not a measurement of water pollution.

Waste landfills

Landfill	Area	Year established	Monitoring	From the water
Kátov	2 400 m²	1975	–	1.8 km
Skalica	15 000 m²	1960	–	2.0 km
Skalica	55 000 m²	1976	–	2.5 km
Skalica	4 800 m²	1972	–	2.6 km

How to read these data

Zone and distance. The distance is measured from the line of the water to the point in the register (to the centre for areas), with an accuracy of tens of metres. Counts apply only to the zone, not to the whole catchment.
Percentile. For chemistry, the highest value is compared with all atlas samples in Slovakia. It is not a legal limit or a health risk assessment; the atlases are historical (published: surface waters 2015, groundwater 1996, river sediments 1999).
Limit of quantification. Many samples have a value at the lowest level the laboratory can determine; such results mean "below the limit". For these, the position in the distribution is an estimate.
Šlichy. Only samples with a find are recorded. The number of grains in a concentrate is not the gold content in grams per tonne.
Relation to water. A mine working, landfill or burden nearby proves nothing about the quality of the water in the stream. It serves as a prompt for attention and a starting point for further investigation.
Sample points. The area and raster maps of ŠGÚDŠ cannot be downloaded as points, so along the line of each fishing district the value is looked up at points roughly every 3 km. It is a sample of the line, not a continuous record; a very short section may have a single point.
Atlas rasters. The chemistry of water and sediments is an interpolation of measurements in a sampling network (Geochemical Atlas of Slovakia). The value at a point is a modelled estimate for the surroundings, not a measurement in the water. The percentile compares the average of this stream with all sample points on streams in Slovakia.
Positions and scales. The maps have different scales (1:50,000 to 1:1,000,000), so the level of detail differs between sections. A map outside its coverage means there is no area at that point, not that there is nothing there.

Organizations and location

Who manages the fishing districts and where they are

Organizations on the watercoursewho manages the fishing districts and what the conditions are there today

Skalica1 fishing district · 0.4 km28OR Žlutnica28

Skalica district, Trnava Region

More watercourses nearby

Danube basin

Today on the OR Žlutnica watercourse

Average of the watercourse's fishing districts

Best window today

Map and fishing districts of the watercourse

Elevation profile of the watercourse

Historical images

Water pollution on the OR Žlutnica watercourse

Groundwater: measured valuestypical value from stations within 10 km, 2025

Geology and geochemistry of the OR Žlutnica stream

Water according to the atlas

Elements in river sediment

Heat underfoot

Natural gamma radiation

Old mine workings

Gold in river sediment

Trace elements in the stream water

Boreholes and groundwater analyses

Geothermal energy

Environmental burdens and landfills

Deposits and ore occurrences

Landslides and slope deformations

Hydrogeology: aquifers and groundwater

Main hydrogeological region

Surface water chemistry according to the atlas

Water acidity

Water hardness

Dissolved substances

Ionic composition of the water

Major ions

Nutrients and organic pollution

Metals

Elements in river sediments

Potentially toxic and trace elements

Natural radioactivity and radon

Gamma radiation dose rate

Geophysical fields: magnetics and gravity

Magnetic anomaly

Geothermal potential

Rock temperature with depth

Relief, climate and soils

Susceptibility of soils to acidification

Map of the corridor

Groundwater: chemistry, water types and radioactivity

Metals in groundwater

Radon in waters

Boreholes and Geofond archive reports

Borehole depths

Nearest boreholes

Geothermal energy and mineral waters

Sources of geothermal and mineral waters

Environmental burdens, landfills and anthropogenic sediments

Waste landfills

How to read these data

Organizations and location

Organizations on the watercoursewho manages the fishing districts and what the conditions are there today

More watercourses nearby

Kátovský Kút

OR Lipa

Baráky

Kanál Kátovské jazero

Farská voda

Štrkovisko Holíč