METROPOLITAN ADELAIDE WATER SUPPLY Five Yearly Statistics for Customer Taps by Water Treatment Plant System Data for the Period 1/7/94 - 30/6/99 1996 NHMRC Guideline Value ANSTEY HILL SYSTEM BAROSSA SYSTEM HAPPY VALLEY SYSTEM HOPE VALLEY SYSTEM LITTLE PARA SYSTEM MYPONGA SYSTEM Parameter Health Aesthetic Minimum Maximum Average Minimum Maximum Average Minimum Maximum Average Minimum Maximum Average Minimum Maximum Average Minimum Maximum Average MAJOR COMPONENTS Conductivity uS/cm@25oC 373 1160 720 528 820 641 490 1130 779 507 1020 719 548 1070 812 510 739 672 Total Dissolved Solids - Calculated (mg/L) 500 205 639 396 290 451 352 269 622 430 278 561 395 301 589 446 280 406 369 pH 6.5 - 8.5 7.0 8.6 7.4 6.9 7.9 7.2 6.8 8.0 7.4 6.9 8.2 7.3 7.1 8.3 7.4 7.1 8.4 7.5 Bicarbonate (mg/L) 33 115 65 44 76 60 45 120 71 37 113 80 30 124 86 52 108 65 Calcium (mg/L) 18 37 27 19 34 25 23 34 27 19 35 28 21 39 28 20 34 24 Chloride (mg/L) 250 41 284 152 105 171 133 87 278 171 84 240 148 110 256 179 91 157 136 Fluoride (mg/L) 1.5 0.83 0.97 0.91 0.11 0.97 0.82 0.80 1.06 0.89 0.82 0.99 0.90 0.30 0.97 0.86 0.78 0.95 0.85 Magnesium (mg/L) 6 27 17 11 21 16 13 27 20 11 28 20 13 30 22 11 20 14 Nitrate as NO3 (mg/L) 50 0.04 2.84 0.82 0.04 1.55 0.50 0.01 2.07 0.95 0.04 2.75 0.95 0.03 1.72 0.57 0.02 1.94 0.44 Potassium (mg/L) 3.1 8.2 5.0 3.4 5.2 4.2 3.8 7.5 5.0 3.4 6.8 4.8 3.2 7.1 4.9 4.5 7.3 5.7 Sodium (mg/L) 180 38 162 87 53 88 71 45 155 94 51 135 82 60 133 97 49 96 83 Silica as SiO2 (mg/L) 1 19 5 5 8 6 1 11 5 2 8 5 2 10 6 4 9 6 Sulphate (mg/L) 500 250 40 71 57 34 70 50 36 66 54 37 71 53 31 60 50 43 73 54 Total Hardness as CaCO3 (mg/L) 200 72 176 137 104 173 130 112 188 150 115 194 150 118 207 161 100 166 118 Non Carbonate Hardness (mg/L) as CaCO3 31 121 84 58 115 81 33 126 92 37 111 84 47 116 90 43 98 65 Alkalinity as CaCO3 (mg/L) 27 94 53 36 62 49 37 98 58 30 93 66 26 102 70 43 89 53 Langelier Index -1.5 -0.3 -1.0 -1.7 -0.5 -1.2 -1.5 0.3 -0.9 -1.4 0.1 -0.8 -1.4 -0.1 -0.8 -1.3 -0.2 -0.8 Free Carbon Dioxide (mg/L) 2 7 4 1 12 6 0 15 5 1 10 5 0 11 5 1 6 3 MINOR COMPONENTS True Colour (Hazen Units) 15 <1 14 3 <1 8 4 <1 13 3 <1 10 3 <1 8 4 <1 8 3 Turbidity (NTU) 5 0.06 1.40 0.26 0.07 14.00 0.33 0.05 5.00 0.28 0.06 6.60 0.25 0.03 1.40 0.22 0.06 6.30 0.38 Phosphorus - Total (mg/L) <0.005 0.023 0.009 <0.005 0.059 0.013 <0.005 0.371 0.015 <0.005 0.066 0.012 <0.005 0.026 0.010 <0.005 0.029 0.010 Phosphorus - Soluble (mg/L) <0.005 0.015 0.005 <0.005 0.005 0.005 <0.005 0.024 0.005 <0.005 0.009 0.005 <0.005 0.005 0.005 <0.005 0.006 0.005 Nitrate as Nitrogen (mg/L) 11.3 <0.01 0.640 0.186 <0.01 0.350 0.113 0.002 0.468 0.215 0.009 0.620 0.214 0.007 0.388 0.128 0.004 0.439 0.100 Nitrite as Nitrogen (mg/L) 0.9 <0.005 0.010 0.007 <0.005 0.010 0.007 <0.005 0.011 0.008 <0.005 0.010 0.007 <0.005 0.010 0.008 <0.005 0.010 0.007 Total Kjeldahl Nitrogen (mg/L) 0.07 0.56 0.29 <0.05 0.56 0.32 0.15 0.62 0.28 0.12 0.45 0.27 0.19 0.50 0.29 0.20 0.45 0.31 Ammonia as N (mg/L) 0.41 <0.005 0.024 0.008 <0.005 0.023 0.010 <0.005 0.098 0.008 <0.005 0.051 0.008 <0.005 0.013 0.007 <0.005 0.016 0.008 Dissolved Organic Carbon (mg/L) 1.9 5.8 3.7 4.0 7.0 5.4 0.8 5.1 3.7 2.0 13.0 4.0 2.4 6.9 4.4 3.4 11.7 4.3 HEAVY METALS Aluminium - Total (mg/L) 0.036 0.233 0.113 0.027 0.208 0.088 0.029 0.260 0.101 0.023 0.203 0.089 0.027 0.426 0.082 0.015 0.173 0.059 Aluminium - Soluble (mg/L) 0.2 0.019 0.095 0.052 0.011 0.085 0.036 0.012 0.128 0.046 0.016 0.099 0.048 0.012 0.063 0.034 0.015 0.183 0.035 Antimony (mg/L) 0.003 <0.001 0.002 0.001 <0.001 0.002 0.001 <0.001 0.002 0.001 <0.001 0.002 0.001 <0.001 0.001 0.001 <0.001 0.002 0.001 Arsenic (mg/L) 0.007 <0.001 0.002 0.001 <0.001 0.002 0.001 <0.001 0.006 0.001 <0.001 0.003 0.001 <0.001 0.002 0.001 <0.001 0.003 0.001 Barium (mg/L) 0.7 0.031 0.064 0.047 0.024 0.041 0.031 0.025 0.045 0.035 0.025 0.049 0.036 0.036 0.047 0.041 0.016 0.036 0.024 Boron (mg/L) 0.3 0.024 0.111 0.064 0.022 0.080 0.049 0.015 0.097 0.056 0.005 0.116 0.057 0.041 0.109 0.061 0.025 0.082 0.045 Cadmium (mg/L) 0.002 <0.0002 0.0004 0.0002 <0.0002 0.0003 0.0002 <0.0002 0.0007 0.0002 <0.0002 0.0010 0.0002 <0.0002 0.0009 0.0002 <0.0002 0.0002 0.0002 Chromium (mg/L) 0.05 <0.005 0.030 0.013 <0.005 0.030 0.013 <0.005 0.042 0.012 <0.005 0.030 0.012 <0.005 0.030 0.010 <0.005 0.048 0.014 Copper (mg/L) 2 1 <0.005 0.077 0.027 <0.005 0.201 0.049 0.010 0.266 0.053 <0.005 0.234 0.047 <0.005 0.116 0.058 0.032 0.141 0.075 Iron (Total) (mg/L) 0.3 <0.005 0.121 0.024 <0.005 0.265 0.023 <0.005 3.056 0.056 <0.005 0.209 0.024 <0.005 0.281 0.031 <0.005 0.065 0.014 Lead (mg/L) 0.01 <0.001 0.005 0.001 <0.001 0.007 0.002 <0.001 0.005 0.001 <0.001 0.007 0.002 <0.001 0.001 0.001 <0.001 0.005 0.001 Manganese (mg/L) 0.5 0.1 <0.005 0.048 0.006 <0.005 0.018 0.007 <0.005 0.026 0.006 <0.005 0.023 0.006 <0.005 0.015 0.005 <0.005 0.255 0.020 Mercury (mg/L) 0.001 <0.0001 0.0005 0.0001 <0.0001 0.0001 0.0001 <0.0001 0.0004 0.0001 <0.0001 0.0005 0.0001 <0.0001 0.0003 0.0001 <0.0001 0.0002 0.0001 Molybdenum (mg/L) 0.05 <0.002 0.003 0.002 <0.002 0.002 0.002 <0.002 0.003 0.002 <0.002 0.003 0.002 <0.002 0.003 0.002 <0.002 0.005 0.002 Nickel (mg/L) 0.02 <0.001 0.002 0.001 <0.001 0.002 0.001 <0.001 0.007 0.001 <0.001 0.002 0.001 <0.001 0.005 0.002 <0.001 0.002 0.001 Selenium (mg/L) 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.002 0.001 <0.001 <0.001 <0.001 <0.001 0.008 0.001 <0.001 0.001 0.001 Silver (mg/L) 0.1 <0.0002 0.0002 0.0002 <0.0002 0.0002 0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 0.0002 0.0002 <0.0002 0.0004 0.0002 Zinc (mg/L) 3 <0.005 0.112 0.028 <0.005 0.097 0.037 <0.005 0.138 0.036 <0.005 0.174 0.039 <0.005 0.096 0.032 <0.005 0.106 0.028 "Note: A conserative approach has been used to calculate the average values tabulated above. Where the lower limit of detection for any parameter is preceded by a""<"" sign, the absolute number has been used to calculate the average rather than using a value" Nitrate as Nitrogen (mg/L) 11.3 0.010 0.640 0.190 0.010 0.350 0.131 0.002 0.468 0.212 0.009 0.620 0.238 0.007 0.513 0.159 0.004 0.439 0.108 50.06 0.04 2.84 0.84 0.04 1.55 0.58 0.01 2.07 0.94 0.04 2.75 1.05 0.03 2.27 0.70 0.02 1.94 0.48