Parameters Unit Results *Guide Line
* PHYSICOCHEMICAL PARAMETERS:
Temperature 0C 25.5 ± 4.25 35.0
Electric Conductivity µS/Cm 381.30 ± 5.09 ـــــــــــ
Turbidity NTU 3.51 ± 0.45* 1.00
pH   8.33 ± 1.25 6.5-8.5
Total Hardness as (CaCO3) Mg/l 1347 ± 29* 500
Calcium Hardness Mg/l 1210 ± 33* 350
Magnesium Hardness Mg/l 540+21* 150
Magnesium Mg+2 Mg/l 129+33 ـــــــــــ
Ammonia as (N) Mg/l 1.99+0.21* 0.40
Nitrites as (N) Mg/l 0.23+0.03* 0.06
Nitrates as (N) Mg/l 1.06+0.41 10
Fluoride Mg/l 0.62+0.01 0.8
Cyanide (CN- ) Mg/l Nil 0.05
Sodium Mg/l 159+23 200
Potassium Mg/l 28.9+11.2 ـــــــــــ
Calcium Ca+2 Ppm 61.12 ± 6.20 ـــــــــــ
* Organic Chemical Parameters
Dissolved Oxygen (D.O) mg/l 4.36+0.31 ≥ 4  
Bio Chemical Oxygen Diamond (BOD5) mg/l 12.8+2.11 60  
Chemical Oxygen Diamond (COD) mg/l 32+3.1 80  
* Heavy Metals EOS, 1993 WHO, 2008
Cadmium(Cd) Ppm 0.003 ± 0.0004# 0.01 0.003
Chromium(Cr) Ppm 0.20 ± 0.01 1.0 0.50
Lead(Pb) Ppm 0.33 ± 0.14*# 0.10 0.01
Selenium(Se) Ppm 0.09 ± 0.02 0.40 0.20
Cobalt(Co) Ppm 0.01 ± 0.002 0.20 0.20
Nickle(Ni) Ppm 0.82 ± 0.03*# 0.10 0.10
Copper(Cu) Ppm 0.08 ± 0.01 1.0 1.00
Zinc(Zn) Ppm 0.42 ± 0.06 5.0 3.00
Iron(Fe) Ppm 9.06 ± 0.86*# 0.30 0.30
Aluminum (Al) Ppm 7.94 ± 1.83*# 3.0 1.00
Manganese(Mn) Ppm 0.90 ± 0.24*# 0.10 0.10
Table 1: Some physicochemical characteristics of sewage water of El-Shikh pond at Elkharja, New Valley; presented data are means ± SE of measurements undertaken during April-July 2014.