None of our transmission or distribution lines are lead pipes. Based on institutional knowledge and experience, we have no lead service lines in our system. Athens-Clarke County started using an Ortho-Phosphate blend back in 1991, as a means of corrosion control. Controlling corrosion in lead pipes significantly reduces the possibility of lead leaching into tap water, even in the oldest of homes.
To gauge the effectiveness of the corrosion control chemical dosage, quarterly metal coupons (samples) are placed at selected places in our distribution system. At the end of the quarter we remove the coupons and send them to an independent lab which measures the amount of corrosion to the coupons, and the effectiveness of our dosage/treatment.
We maintain the pH to between 7.5 and 7.75 to further minimize the possibility of our water being corrosive. pH is a measure of acidity, and the lower the number, the more acidic and corrosive the water is. pH of 7.0 is considered neutral.
We have never exceeded EPD Action Levels during decades of sampling.