Potential Impacts to Drinking
Water - Brewster, Chatham, Harwich and Orleans
A Zone of Contribution (ZOC) is an area of an aquifer that
contributes water to a well under the most severe pumping and
recharge conditions.
These maps depict potential sources fo groundwater contamination
and zones of contribution for public wells. Some common potential
threats to groundwater are listed below;
|
*
|
Sewage disposal through septic systems, shown
below as areas of residential land use (over 90% of Cape
residents dispose of domestic sewate in cesspools and septic
systems). |
|
*
|
Landfills and dumps |
|
*
|
On-site waste disposal by commercial
and industrial establishments |
|
*
|
Use of pesticides on cranberry
bogs, golf courses, and lawns. |
|
*
|
Discharge of treated effluent from public
and private wastewater treatment facilities to the groundwater. |
|
*
|
Underground storage tanks that
may leak contaminants into groundwater |
|
*
|
Agricultural chemicals and pesticides (agricultural
land use not shown in these maps). |
|
 |
