Soil intrusion during water main repairs can render
a distribution system vulnerable to contamination.
Because fecal indicators are not always present
in soil and groundwater near water mains, they cannot
be used to monitor intrusion into the distribution
system. This study provides data to support the use
of aerobic endospores to monitor intrusion and evaluate
distribution system maintenance practices.
Aerobic endospores are naturally found in soil,
easy to measure, and more resistant to chlorine than
bacterial indicators. In the case of suspected low or
negative pressure in a part of the distribution system,
aerobic-endospore measurement could be useful in
assessing the possibility that the lack of pressure was
associated with potential contamination. Aerobic
endospores also meet the criteria for an ideal microbial
indicator of intrusion, namely the ability to
confirm both the pathway by which potentially
contaminated water entered the distribution system
and the extent of the intrusion. Includes 52 references, tables, figures.
| Edition : | Vol. 101 - No. 7 |
| File Size : | 1
file
, 960 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 07/01/2009 |
