The point-of-use corrosion control monitoring dataset represents two distinct monitoring programs, described in McIlwain and Trueman et al. The first comprised samples collected at residential (1 L volume) and non-residential (0.25 L volume) sites in the distribution system after a minimum 8 hour stagnation period (Table ). Samples were collected over three years (2010-2012), representing two October and two February collection periods. This program was designed to evaluate the utility's corrosion control program and to identify outlets with high lead levels. The 34 residential sites included three and six with full and partial lead service lines, respectively. A further 18 had copper service lines and the remaining 7 had unknown configurations. Outlets used for drinking or cooking were sampled in 48 non-residential buildings. The second program was designed to evaluate the effect of lead service line replacement on lead levels in tap water. Volunteers residents collected 1 L samples as 4 × 1L minimum 6-hr. stagnant profiles with the addition of a 5-min. flushed sample after each profile (Table ). We filtered a subset of these using 0.45 µm membrane filters in a syringe-mounted apparatus. To quantify aluminum in the distribution system, we used 5-min. flushed samples only, thereby minimizing the impact of site-specific factors (e.g., premises plumbing). To estimate particulate lead and copper, we used samples collected before replacement, since extreme particulate lead release is typical immediately after replacement.