Denomination 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
River DANUBE, sampling station Rajka
Stream flow, m³/s 293.0 388.0 493.0 380.5 439.0 429.0 481.0 500.0 410.0 389.0 418.0 853.0 426.7 376.4 432.3 418.3 384.0 479.0 539.3 404.4 418.3 361.3 649.8 375.1 404.3
Water temperature, °C 11.2 9.5 10.7 11.8 10.7 11.8 11.1 11.0 11.8 10.1 11.0 9.8 11.7 11.9 10.8 10.2 11.3 11.0 11.3 11.4 11.3 11.5 11.0 12.4 10.8
Acidity, pH 8.0 8.2 8.3 8.2 8.1 8.1 8.2 8.1 8.0 8.2 8.0 7.9 8.0 8.0 8.0 8.2 8.2 8.2 8.2 .. .. .. .. .. ..
Dissolved oxygen, mg O2/l 9.6 9.7 10.8 9.5 9.7 9.7 9.5 10.4 10.5 11.5 10.7 11.2 10.4 10.8 11.1 10.9 10.8 10.9 11.8 10.7 10.7 11.8 11.6 11.1 10.8
Oxygen saturation, % 87.0 84.0 98.0 88.0 86.0 89.0 86.0 93.3 96.5 102.9 95.9 97.1 94.5 99.5 99.1 96.2 96.6 97.3 106.6 96.7 96.5 107.4 103.3 102.4 101.3
Biochemical oxygen demand, BOD5 (20°C, 5d), mg O2/l 2.1 2.6 2.7 2.6 2.1 1.6 1.8 2.9 2.5 2.2 2.7 2.5 2.2 3.5 3.5 2.6 3.8 4.1 4.6 3.8 3.7 3.0 3.4 3.3 3.3
Chemical oxygen demand, COD (K2Cr2O7), mg O2/l 12.0 13.0 10.0 10.0 10.0 10.0 10.0 10.1 9.3 9.7 9.8 11.0 9.0 9.3 9.8 10.2 8.5 8.8 10.3 9.0 7.1 8.4 8.7 6.9 6.3
Total suspended solid, mg/l 42.0 29.0 42.0 17.0 34.0 36.0 27.0 26.9 17.5 18.6 33.6 69.0 29.0 19.1 35.0 34.4 20.2 38.1 61.1 42.3 17.3 25.0 35.6 21.8 29.9
Chloride, mg/l 252.0 274.0 254.0 244.0 261.0 248.0 289.0 263.4 248.9 268.5 262.2 284.7 242.4 236.7 248.3 291.9 274.9 230.9 261.9 265.4 261.7 255.9 258.8 237.1 233.6
Total nitrogen, µg N/l 3,100.0 3,320.0 2,653.0 4,456.0 3,882.0 3,850.0 3,600.0 3,506.3 2,912.8 3,260.9 2,356.9 2,726.2 2,431.7 2,433.3 2,746.7 3,287.5 2,909.2 2,453.3 2,568.3 2,354.2 2,271.7 2,126.7 2,125.8 2,148.3 1,950.8
Nitrates (NO3), µg NO3/l 9,228.5 11,464.9 8,981.5 8,431.3 9,390.3 8,510.0 8,300.0 9,060.5 8,523.3 8,637.4 8,276.3 8,581.2 7,746.3 7,510.1 7,635.6 9,710.0 8,630.0 6,852.5 8,092.5 7,917.5 8,311.7 7,833.3 7,684.2 7,241.7 6,833.3
Ammonium (NH4), µg N/l 90.0 86.0 78.0 74.0 72.0 80.0 63.8 80.7 52.3 64.1 46.5 46.2 34.2 25.8 39.2 50.0 40.0 32.3 75.8 50.0 57.5 66.7 42.5 60.0 ..
Total phosphorus, µg P/l 95.0 92.0 107.0 99.0 119.0 105.0 115.0 135.2 83.5 105.1 151.9 253.8 97.5 75.0 109.2 120.0 93.3 108.3 111.7 104.2 69.2 90.0 92.5 80.0 95.8
Orthophosphates, µg P/l 74.0 71.0 43.0 44.0 37.0 50.0 40.0 42.7 29.4 37.7 43.5 95.5 41.1 32.1 45.3 37.7 30.4 48.3 127.5 115.8 120.0 104.2 105.8 110.8 91.7
Chlorophyll-a (summer), µg/l 11.4 19.8 22.2 30.5 23.4 16.6 20.9 17.7 15.1 22.5 22.6 14.8 16.4 19.1 3.4 6.4 5.5 3.4 10.0 9.9 4.3 4.5 6.5 5.8 4.2
Coliform-counts, n/100 ml 1,150.0 1,293.0 469.0 1,796.0 902.0 580.0 850.0 1,485.5 436.7 401.7 460.0 600.0 .. .. .. .. .. .. .. .. .. .. .. .. ..
River DRÁVA, sampling station Drávaszabolcs
Stream flow, m³/s 479.0 598.0 437.0 513.0 588.0 549.0 464.0 410.6 348.8 501.6 474.1 326.7 338.0 483.5 627.9 633.4 442.4 528.3 638.5 714.9 459.2 269.7 359.7 446.4 259.8
Water temperature, °C 12.1 11.9 12.5 12.6 12.7 13.1 13.3 13.6 13.9 12.3 12.6 5.8 13.2 13.1 12.4 12.5 11.8 12.7 12.5 13.2 15.4 12.2 12.8 15.8 12.9
Acidity, pH 8.2 8.2 8.2 8.1 8.1 8.2 8.2 8.1 8.0 8.0 8.0 7.9 .. .. .. .. .. 8.2 8.3 .. .. .. .. .. ..
Dissolved oxygen, mg O2/l 9.8 10.6 10.1 9.8 9.8 9.5 9.8 9.8 10.8 9.9 9.9 11.6 9.8 9.6 9.1 9.1 10.0 9.9 9.6 9.6 9.6 8.5 9.7 8.1 7.5
Oxygen saturation, % 91.0 97.0 93.0 91.0 91.0 89.0 93.0 92.8 103.9 90.5 90.9 92.2 92.1 89.8 84.5 83.4 90.3 92.1 88.9 91.2 95.7 77.7 90.2 79.8 72.5
Biochemical oxygen demand, BOD5 (20°C, 5d), mg O2/l 3.5 3.1 3.3 3.0 2.9 2.9 2.6 2.3 3.0 2.4 2.1 3.6 1.6 1.7 1.3 1.8 2.1 2.1 2.2 1.6 2.4 2.1 2.8 3.7 4.6
Chemical oxygen demand, COD (K2Cr2O7), mg O2/l 9.0 11.0 9.0 9.0 11.0 8.0 7.0 7.1 8.4 7.7 8.8 10.0 9.2 8.9 9.6 10.6 7.5 9.1 8.8 8.5 9.6 13.0 9.4 14.4 15.5
Total suspended solid, mg/l 25.0 21.0 15.0 22.0 30.0 17.0 14.0 12.6 11.5 9.7 18.3 11.0 14.0 .. .. .. 9.3 16.6 17.5 20.8 13.9 11.2 11.7 19.0 14.1
Chloride, mg/l 230.0 211.0 240.0 232.0 298.0 .. .. 180.0 .. .. .. .. .. .. .. .. 243.3 215.3 205.2 205.2 214.7 217.8 219.7 .. ..
Total nitrogen 2,600.0 2,594.0 1,989.0 2,241.0 1,975.0 1,710.0 1,630.0 1,697.5 1,638.9 1,684.3 1,700.0 2,330.0 1,741.4 1,620.8 1,700.8 .. 1,378.7 1,332.7 1,579.2 1,416.3 1,364.2 1,275.9 1,349.2 1,376.3 1,360.0
Nitrates (NO3), µg NO3/l 8,180.0 7,240.0 6,060.0 6,300.0 6,500.0 5,370.0 5,000.0 5,241.7 5,029.1 5,865.4 6,316.7 6,320.4 5,111.5 4,588.0 5,404.3 5,650.0 4,610.0 4,372.7 5,079.2 4,018.2 4,431.6 3,883.3 4,553.8 3,462.5 2,725.0
Ammonium (NH4), µg N/l 70.0 53.0 67.0 55.0 47.0 60.0 50.0 75.8 79.6 43.5 50.8 56.9 39.1 39.2 52.5 50.0 50.0 49.1 76.7 107.3 70.5 65.2 69.2 78.1 ..
Total phosphorus, µg P/l 129.0 156.0 135.0 120.0 143.0 119.0 95.0 97.1 82.7 83.5 85.4 84.3 74.3 86.3 90.8 41.9 72.0 83.2 70.4 83.8 .. .. .. .. ..
Orthophosphates, µg P/l 58.0 50.0 46.0 60.0 59.0 60.0 45.0 39.5 30.2 45.0 44.9 41.2 40.0 36.8 37.5 72.8 128.7 46.0 113.3 115.5 108.4 173.3 101.5 328.1 121.0
Chlorophyll-a (summer), µg/l 8.6 19.2 13.3 10.9 8.7 10.4 14.9 15.8 32.9 8.8 10.6 9.3 12.8 7.0 5.2 8.0 7.2 7.8 6.9 3.6 10.5 8.2 6.9 9.1 31.8
Coliform-counts, n/100 ml 3,070.0 3,539.6 1,248.3 724.8 790.8 1,450.0 390.0 395.9 1,215.0 203.8 793.3 140.0 78.0 .. .. .. .. .. .. .. .. .. .. .. ..
River TISZA, sampling station Tiszabecs
Stream flow, m³/s 286.0 173.0 204.0 288.0 212.0 161.0 375.0 256.2 109.2 232.7 190.5 223.6 215.0 258.0 172.0 272.0 142.0 135.0 176.0 .. .. .. .. .. ..
Water temperature, °C 9.9 9.2 9.4 9.7 10.1 10.5 10.4 10.4 10.1 10.0 9.5 10.5 13.9 10.9 12.2 11.0 11.3 13.1 13.0 13.3 13.4 13.2 11.9 13.3 14.1
Acidity, pH 7.9 7.9 7.8 7.8 7.6 7.8 7.8 7.8 7.7 7.7 7.6 7.6 7.6 7.6 8.0 8.0 7.9 7.8 7.8 .. .. .. .. .. ..
Dissolved oxygen, mg O2/l 11.3 11.1 12.6 12.1 12.7 14.0 14.2 14.5 17.4 12.8 12.0 9.9 10.1 11.7 10.6 11.1 12.0 .. 13.7 13.6 8.9 10.4 10.8 10.5 9.9
Oxygen saturation, % 98.0 95.0 110.0 105.0 112.0 126.0 128.0 129.6 152.0 113.7 105.7 89.4 94.7 99.2 97.7 99.8 100.5 .. 99.0 93.5 81.9 95.2 98.4 99.2 101.6
Biochemical oxygen demand, BOD5 (20°C, 5d), mg O2/l 1.9 1.5 2.0 2.6 3.6 2.8 3.6 2.8 2.9 3.4 3.5 4.1 2.8 2.5 2.6 1.9 3.2 .. .. .. 1.2 1.6 1.4 1.4 1.1
Chemical oxygen demand, COD (K2Cr2O7), mg O2/l 8.0 5.0 7.0 10.0 12.0 9.0 13.0 10.3 10.0 12.2 12.0 13.4 18.0 18.3 14.4 11.5 10.3 11.9 9.4 5.0 11.0 5.6 5.8 5.4 5.8
Total suspended solid, mg/l 54.0 46.0 54.0 58.0 36.0 53.0 163.0 55.4 27.3 41.2 68.7 45.9 26.8 93.9 54.6 32.9 59.7 109.3 44.8 15.3 100.0 26.6 29.4 28.8 51.5
Chloride, mg/l 232.0 261.0 177.0 182.0 210.0 224.0 216.0 219.5 268.8 240.2 327.4 313.9 207.0 207.6 163.6 165.3 148.3 137.4 142.2 146.3 147.8 150.3 150.8 164.3 184.6
Total nitrogen 1,030.0 884.0 828.0 1,000.0 870.0 860.0 870.0 1,026.2 880.8 811.5 758.1 740.4 1,409.0 1,880.0 793.1 850.0 1,530.0 971.4 .. .. 1,000.0 880.0 872.7 1,100.0 920.0
Nitrates (NO3), µg NO3/l 4,100.0 3,410.0 2,920.0 3,390.0 2,840.0 2,660.0 2,770.0 3,500.0 2,940.0 3,103.8 2,819.2 2,750.0 2,316.1 2,586.3 .. .. .. .. .. .. 2,692.3 2,830.0 2,716.7 2,208.3 2,100.0
Ammonium (NH4), µg N/l 20.0 32.0 80.0 60.0 68.0 60.0 40.0 55.4 79.2 53.5 58.5 52.1 98.5 66.7 0.1 0.0 0.1 39.2 .. .. 109.2 53.0 45.0 30.0 ..
Total phosphorus, µg P/l 67.0 84.0 71.0 21.0 66.0 50.0 128.0 75.3 61.7 117.0 75.4 82.1 .. .. 44.1 45.3 52.6 220.3 90.0 40.0 206.5 41.8 62.8 68.6 82.1
Orthophosphates, µg P/l 45.0 49.0 54.0 13.0 49.0 29.0 50.0 40.8 31.7 31.9 30.2 30.3 11.8 25.0 13.0 17.6 16.8 37.3 12.3 8.5 42.7 38.2 24.2 25.9 25.6
Chlorophyll-a (summer), µg/l 23.4 4.4 3.6 2.7 2.6 2.0 2.0 1.9 3.6 1.9 2.6 1.7 3.6 1.8 1.8 1.9 3.6 3.5 3.5 1.7 3.1 2.6 1.6 1.9 4.3
Coliform-counts, n/100 ml 845.0 525.7 40,271.7 2,863.3 4,471.4 2,040.0 1,390.0 917.5 1,834.3 1,440.0 646.0 792.5 725.0 .. .. .. .. .. .. .. .. .. .. .. ..

Footnotes

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Source: VITUKI Kht. Arithmetic mean values.
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