Page 4      2008 Annual Drinking Water Quality Report Turbidity   NOT REQUIRED Total Coliform Total coliform bacteria are used as indicators of microbial contamination of drinking water because testing for them is easy. While not disease-causing themselves, they are often found in association with other microbes that are capable of causing disease. Coliform bacteria are more hardy than many disease-causing organisms; therefore, their absence from water is a good indication that the water is microbiologically safe for human consumption. Year Contaminant Highest Monthly Number of Positive Samples MCL Unit of Measure Source of Contaminant 2008 Total Coliform Bacteria 1 * Presence Naturally present in the environment. Year Contaminant Highest Monthly Number of Positive Samples MCL Unit of Measure Source of Contaminant 2008 Total Coliform Bacteria 1 * Presence Naturally present in the environment. *Two or more coliform found samples in any single month. Fecal Coliform   REPORTED MONTHLY TESTS FOUND NO FECAL COLIFORM BACTERIA. VIOLATIONS Violation Type Health Effects Duration Explanation Steps to Correct CONSUMER CONFIDENCE REPORT - FAILURE TO PREPARE OR PROVIDE TO CUSTOMERS Failure to notify consumers of their drinking water quality makes it impossible for consumers to evaluate the use of the water for drinking, cooking, washing, or bathing. 7/2/2008 to PRESENT     CONSUMER CONFIDENCE REPORT - FAILURE TO SUBMIT CERTIFICATION OF DELIVERY TO TCEQ Failure to adequately notify consumers of their drinking water quality makes it impossible for consumers to evaluate the use of the water for drinking, cooking, washing, or bathing. 7/2/2008 to PRESENT     DISTRIBUTION: DISINFECTANT RESIDUAL - FAILURE TO MONITOR OR REPORT REQUIRED SAMPLES We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not your drinking water meets health standards. During this compliance period, we did not correctly monitor or report, and therefore TCEQ cannot be sure of the quality of your drinking water at that time. 10/1/2008 to 12/31/2008     Secondary and Other Constituents Not Regulated (No associated adverse health effects) 2006 Bicarbonate 345 345 345 NA ppm Corrosion of carbonate rocks such as limestone. 2008 Calcium 39.5 39.5 39.5 NA ppm Abundant naturally occuring element. 2006 Chloride 76 76 76 300 ppm Abundant naturally occuring element; used in water purification; byproduct of oil field activity 2008 Copper 0.005 0.005 0.005 1 ppm Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives. 2008 Iron .153 .153 .153 .3 ppm Erosion of natural deposits; iron or steel water delivery equipment or facilities. 2008 Magnesium 25.9 25.9 25.9 NA ppm Abundant naturally occuring element. 2008 Manganese 0.0018 0.0018 0.0018 .05 ppm Abundant naturally occuring element. 2008 Nickel 0.001 0.001 0.001 NA ppm Erosion of natural deposits. 2006 pH 7.5 7.5 7.5 >7.0 units Measure of corrosivity of water. 2008 Sodium 92 92 92 NA ppm Erosion of natural deposits; byproduct of oil field activity. 2006 Sulphate 50 50 50 300 ppm Naturally occuring; common industrial byproduct; byproduct of oil field activity. 2006 Total Alkalinity as CaCO3 283 283 283 NA ppm Naturally occuring soluble mineral salts. 2006 Total Dissolved Solids 494 494 494 1000 ppm Total dissolved mineral constituents in water. 2008 Total Hardness as CaCO3 205 205 205 NA ppm Naturally occuring calcium. 2008 Zinc 0.039 0.039 0.039 5 ppm Moderately abundant naturally occuring element; used in the metal industry. 2460027      Page 4      2008 Annual Drinking Water Quality Report

High Gabriel Water Supply Corporation Contact Information P.O. Box 2799 Cedar Park, TX 78630 Office: 512-259-3888 Emergencies: 512-589-7031 Email: billing@texaswater.net www.highgabrielwsc.com