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Table 2 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)

  U1 SSB effluent 1 D1 U2 SSB effluent 2 D2
Conductivity (µs/cm) 451 720 540 475 765 509
Water temperature (°C) 13.9** 12.1 13.6** 18.7* 13.6 18.2*
O2 saturation (%) 113.5 111 120 116 118.2 111.7
O2 content (mg/L) 10.92** 11 11.6** 9.94** 11.31 9.83**
NH4–N (mg/L) 0.06* <0.04** <0.04** <0.04 <0.04**
NO–N (mg/L) 0.012 0.01 0.007 0.01 0.006
NO–N (mg/)L 0.7 0.9 0.9 3.8 1.1
PO–P (mg/L) <0.05* <0.05* <0.05* <0.05 <0.05*
Carbonate hardness (°dH) 16 15 19 19
Overall hardness (°dH) 15 16 20 20
pH 8.5* 8.5* 8.2* 7.95 8.1*
Chloride (mg/L) 11** 19** 13** 70 17**
  1. Values were evaluated and assessed according to the guidance values defined by LAWA (German Working Group for Water Issues; LUBW [18]) 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