Watercourse

Hron

Hron basinCarpSalmon – troutSalmon – grayling
fishing districts
19
fishing district length
410km
regions
Nitra Region, Banská Bystrica Region
  • Carp291 km11 fishing districts
  • Salmon – trout36,8 km1 fishing district
  • Salmon – grayling82,3 km7 fishing districts
Aerial image of watercourse Hron with the line highlighted
Blue line: course of the watercourse (approximate). Orthophoto mosaic of Slovakia © GKÚ Bratislava, CC BY 4.0Mapy Google

By the water now

Today on the Hron watercourse

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

Average of the watercourse's fishing districts

Low activity · average of 19 fishing districts

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.
  • Very high0
  • High0
  • Average1
  • Low18

When the best window ishow many fishing districts have their best two-hour window in a given hour

  1. 00
  2. 06
  3. 12
  4. 18

Most fishing districts have their best window around 14:00.

The score is an estimate of conditions based on weather, water and surroundings, not a bite forecast. Recalculated at 02:04.

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

1445fishing districts
Pick a category to narrow the selection. Next to each option you can see how many fishing districts remain.
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    Water state on the watercourse

    Measurement of water level, temperature and flow, weather by the watercourse and status from satellites

    Water levels on the watercourse

    StanicaStavZmenaTeplota
    Banská Bystrica73 cm–
    Brehy5 cm–
    Brezno5 cm–
    Dubová68 cm–
    Jur nad Hron58 cm–
    Kamenín74 cm–
    Polomka26 cm–
    Telgárt13 cm–
    Veľké Kozmálovce43 cm–
    Zlatno29 cm–
    Zvolen25 cm–
    Žiar nad Hronom100 cm–
    Source: SHMÚUpdated 7 Nov 2026 01:57

    Elevation profile of the watercourse

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

    Gentle gradient The current is noticeable, with shallows and slacks alternating. A transition between a lowland and a foothill watercourse.

    02004006008001 0000 km100 km200 kmč.12č.11bč.10ač. 9cč. 7bč. 6aNo. 5No. 3No. 4No. 1No. 2
    Elevation profile of the watercourse: from 838 to 120 m a.s.l. over 273.7 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
    839 m a.s.l.
    Lowest point
    119 m a.s.l.
    Fall of the fishing districtsFallThe difference in altitude between the upper and lower end of the fishing district in metres. The greater the fall over a shorter length, the faster the water.
    720 m
    Average gradientWatercourse gradientFall per kilometre in per mille (‰, metres per kilometre). Up to 2 ‰ is a slow lowland river, 5 to 10 ‰ a foothill river (grayling, trout), above 10 ‰ a fast stream.
    2,6 ‰
    SinuositySinuosityThe length of the watercourse divided by the straight-line distance between its ends. 1.0 is a straight watercourse; above 1.3 it meanders strongly. Meanders create pools under the banks and shallows in the reaches between.
    1,25

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

    Terén v 3D

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    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 Hron from 2017
    2017imaged 17 Jul 2017
    Aerial image of watercourse Hron from 2020
    2020imaged 2 Aug 2020
    Aerial image of watercourse Hron from 2023
    2023imaged 1 Jun 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 Hron watercourse

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

    Surface water near the fishing districtsnearest SHMÚ monitoring site, 2025

    16 of 19 of the watercourse's fishing districts with SHMÚ data have an unmet standard at the nearest site in at least one indicator.

    • No unmet standard3
    • 1 to 2 indicators11
    • 3 or more indicators5

    Most polluted fishing districtsfirst 8 of 14

    • Hron č. 1Hron · standard not met in 4 of 4 years5 indicators
    • Hron č. 2Hron · standard not met in 4 of 4 years5 indicators
    • Hron č.10aHron · standard not met in 3 of 4 years3 indicators
    • Hron č.10bHron · standard not met in 3 of 4 years3 indicators
    • Hron č.11aHron · standard not met in 3 of 4 years3 indicators
    • Hron č. 8Hron · standard not met in 3 of 4 years2 indicators
    • Hron č. 9aHron · standard not met in 3 of 4 years2 indicators
    • Hron č. 9bHron · standard not met in 3 of 4 years2 indicators

    Problem treatment plants near the fishing districts2 treatment plants within 2 km of the fishing district

    • COV Tlmacedoes not meet the requirements (BOD₅, COD)0,3 km
    • COV Zavadka nad Hronomdoes not meet the requirements (BOD₅, COD), load 102%0,3 km

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

    17 of 19 fishing districts with measurements have groundwater nearby with a value above the limit for at least one indicator.

    • nitrates above the standard (from 50 mg/l)2
    • nitrates 25 to 50 mg/l1
    • harmful substances above the standard at at least one station (metals, pesticides, PFAS, solvents)16
    • ammonium or nitrites above the standard at at least one station5
    • iron from 1 mg/l3

    Highest nitrates

    Watercourse profile from source to mouthnumber of unmet indicators in 2025 at SHMÚ sites

    0246810Červená Skala, nad, rkm 269.6: 1 indicator (2025)Bujakovo, rkm 227.2: 1 indicator (2025)Dubová, most (PTCHEM, nad), rkm 204.5: 2 indicators (2025)Nemecká, most (PTCHEM, pod), rkm 202.3: 3 indicators (2025)Medzibrod (most), rkm 195.7: 1 indicator (2025)Šalková, rkm 181.6: 1 indicator (2025)Banská Bystrica, rkm 175.8: 1 indicator (2025)Hronsek, rkm 165.3: no failed standard (2024)Zvolen (hať Podharajch), rkm 156.5: 2 indicators (2025)Budča, rkm 148.2: 1 indicator (2025)Trnavá Hora – Jalná, rkm 140.1: no failed standard (2025)Žiar nad Hronom, rkm 131.5: 1 indicator (2025)Žarnovica, nad, rkm 112.0: 1 indicator (2023)Brehy, rkm 93.9: 1 indicator (2025)Tekovská Breznica, rkm 88.9: no failed standard (2025)Kozárovce, rkm 78.8: no failed standard (2025)Starý Tekov – most (pod MVE), rkm 70.5: no failed standard (2025)Kalná nad Hronom, rkm 63.7: no failed standard (2025)Želiezovce (cestný most Želiezovce – Sikenica), rkm 35.6: no failed standard (2025)nad Biotikou (objekt CO, pod), rkm 1.9: 6 indicators (2025)Kamenica nad Hronom, rkm 1.7: 5 indicators (2025)Závadka nad Hronom, rkm 0.5: 2 indicators (2025)pod Biotikou (cestný most, pod), rkm 0.5: 10 indicators (2025)rkm 270 (upper course)rkm 1 (towards the mouth)
    Show sites in the table (23)
    • Červená Skala, nadriver km 269.61 indicator
    • Bujakovoriver km 227.21 indicator
    • Dubová, most (PTCHEM, nad)river km 204.52 indicators
    • Nemecká, most (PTCHEM, pod)river km 202.33 indicators
    • Medzibrod (most)river km 195.71 indicator
    • Šalkováriver km 181.61 indicator
    • Banská Bystricariver km 175.81 indicator
    • Hronsekriver km 165.3no unmet standard
    • Zvolen (hať Podharajch)river km 156.52 indicators
    • Budčariver km 148.21 indicator
    • Trnavá Hora – Jalnáriver km 140.1no unmet standard
    • Žiar nad Hronomriver km 131.51 indicator
    • Žarnovica, nadriver km 112.01 indicator
    • Brehyriver km 93.91 indicator
    • Tekovská Breznicariver km 88.9no unmet standard
    • Kozárovceriver km 78.8no unmet standard
    • Starý Tekov – most (pod MVE)river km 70.5no unmet standard
    • Kalná nad Hronomriver km 63.7no unmet standard
    • Želiezovce (cestný most Želiezovce – Sikenica)river km 35.6no unmet standard
    • nad Biotikou (objekt CO, pod)river km 1.96 indicators
    • Kamenica nad Hronomriver km 1.75 indicators
    • Závadka nad Hronomriver km 0.52 indicators
    • pod Biotikou (cestný most, pod)river km 0.510 indicators
    • standard not met
    • no unmet standard
    • site not in the yearbook

    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.

    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

    1. Brezno3 fishing districts · 67 km32Hron č.1238
    2. Podbrezová2 fishing districts · 26 km31Hron č.10b32
    3. Zvolen2 fishing districts · 18 km20Hron č. 7b30
    4. Banská Bystrica4 fishing districts · 30 km19Hron č. 9b30
    5. Štúrovo1 fishing district · 51 km12Hron č. 112
    6. Želiezovce1 fishing district · 24 km11Hron č. 211
    Show 4 more
    1. Nová Baňa1 fishing district · 20 km10Hron č. 410
    2. Žarnovica1 fishing district · 24 km9Hron č. 59
    3. Žiar nad Hronom3 fishing districts · 21 km9Hron č. 6a11
    4. Levice1 fishing district · 129 km1Hron č. 31

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    Hron basin