The Philadelphia Water Department (PWD) studied the effects of residential plumbing on
various water quality parameters: temperature; chlorine residual; ammonia; pH; heterotrophic
plate count; total organic carbon; and, disinfection byproducts (TTHM and HAA5). Volunteers
from throughout Philadelphia sampled their homes' cold and hot waters. For two seasons,
significant changes were seen in many of the parameters between cold and hot waters, including: chlorine
residual decreased; ammonia residual increased; pH was largely unchanged; HPC counts varied;
TOC was unchanged; TTHM increased; and, HAA5 increased. It seemed that the magnitude of
the change between hot and cold water temperature may be an indication of the change in water
quality. The changes were somewhat unique by household, and this raises the question of certain
consumers being more impacted by water quality changes that are not otherwise indicated by
current monitoring programs. Recommendations are made for researchers on conducting more effective
surveys of water quality changes in premise plumbing as more research is pursued on this topic. Includes 8 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 760 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 15 |
| Published : | 11/01/2008 |
