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Table 6 Physicochemical data of sampling events 1 and 2

From: Water quality assessment in the “German River of the years 2014/2015”: how a case study on the impact of a storm water sedimentation basin displayed impairment of fish health in the Argen River (Southern Germany)

  U3 SSB effluent 3 D3 U4 SSB effluent 4 D4 U5 SSB effluent 5 D5
Conductivity (µs/cm) 460 605 474 476 950 490 506 756 520
Water temp. (°C) 10.5** 10.4 9.8** 15.7** 13 14.8** 12.4** 13.2 12.4**
O2 saturation (%) 100 91.1 96 107.0 103 110 102.4 95.1 97.7
O2 content (mg/L) 10.41** 9.47 10.1** 9.9** 10 10.4** 10.27** 9.28 9.66**
NH–N (mg/L) <0.04** 0.07 <0.04** <0.04** 0.09 <0.04** <0.04** <0.04 <0.04**
NO–N (mg/L) 0.005 0.016 0.006 0.01 0.015 0.01 0.005 0.01 0.005
NO3–N (mg/L) 0.7 2 0.9 1.10 2.8 1 1.2 3.9 1.1
PO4-P (mg/L) <0.05* <0.05 <0.005* <0.005* <0.05 <0.005* <0.005* <0.05 <0.005*
Carbonate hardness (°dH) 18 21 17 16.00 20 16 16 21 17
Overall hardness (°dH) 18 21 18 17.00 22 18 19 23 18
pH 8.27* 8.1 8.23* 8.40* 8.25 8.4* 8.4* 8.25 8.4*
Chloride (mg/L) 8** 61 11** 11.00 121 13* 11* 42 15*
  1. Values were evaluated and assessed according to the new guidance values defined by LAWA (German Working Group for Water Issues; LUBW [17]) and the German Regulation Act for Surface Waters of 2011 (OGewV [16])
  2. Values marked with two asterisks (**) point to very good ecological conditions; values marked with one asterisk (*) point to ecological conditions that are at least good