Wellhead protection areas
typically include several protection zones designed with varying degrees of land-use regulation based on proximity to wells and the nature o f potential contamination sources.
In every program, however, the starting point is the determination of wellhead protection areas
. The protection area can range from a few hundred feet to several miles from a well.
The parcel was immediately highlighted in GIS, showing the site location in the one-year wellhead protection area
of a Group A public water system (the Lynden Border Station).
Existing Public Water System Wellhead Protection Area
A wellhead protection area
is one component of such a plan.
* The methods of delineating wellhead protection areas
are as follows, from least to most costly and complex:
The AEM models were then used to delineate time-of-travel wellhead protection areas
for two public water supply wells operated by the City of Verndale.
WHPA 2.0 code: A modular semi-analytical model for the delineation of wellhead protection areas
. Hydro-GeoLogic, Inc., Herndon, Virginia.
EPA has identified the following five criteria that can be used as a technical basis for delineating wellhead protection areas
: distance, drawdown, time of travel, flow boundaries, and assimilative capacity.
Proposed new rules may require additional permitting considerations regarding species other than threatened and endangered species, as well as schools, playgrounds and wellhead protection areas
* The delineation of wellhead protection areas
(WHPAs) is a proactive method of protecting the land areas around public water supply wells.