S/N Parameter(s) Pond Water Standards (NOAA)* Acute Chronic 1 Temp°C 28   ≤15˚C Acceptable maximum [38] 2 Conductivity Us/cm3 348   250 mS/cm [38] 3  pH 6.72   Desirable: 6.5-8.5 [38] 4 Salinity (mg/l) 160 - - 5 TDS (mg/l) 230 - - 6 ORP mV 115 - - 7 Turbidity (JTU) 10 - Desirable: less than 5 NTU [38] 8 Nickel, Ni 0.064 0.47 0.052 9 Chromium, Cr (mg/l) 0.267 0.016 0.011 10 Cadmium, Cd (mg/l) <0.001 0.002 0.00025 11 Lead, Pb (mg/l) <0.001 0.0651  0.0025 12 Zinc, Zn (mg/l) 0.295 0.12 0.12 13 Calcium, Ca (mg/l) 39.454 - - 14 Magnesium, Mg (mg/l) 4.230 - - 15 Sodium, Na (mg/l) 31.007 - - 16 Potassium, K (mg/l) 25.840 373 - 17 PAH (mg/l) 0.006 0.3 - 18 Phosphate PO43- (mg/l) 1.05 < 0.10 (PO4) [39] < 0.10 (PO43-)[39] 19 Sulphate, SO43- (mg/l) 7 - - 20 Nitrate, NO3- (mg/l) 2.0 50[39] 50[39] 21 BOD (mg/l) 0.265 class I fisheries ≤ 1 class II fisheries ≤ 2 class III fisheries ≤ 3 (Japanese EWQS) class I fisheries ≤ 1 class II fisheries ≤ 2 class III fisheries ≤ 3 (Japanese EWQS) 22 DO (mg/l)(lab) 2.12 >5 >5 23 Alkalinity (mg/l) 42.5 ≥ 20 [39] ≥ 20 [39] 24 Hardness (mg/l) 36.0   Desirable: 150-500 [38]

Table 1: Surface water results and standards.