This watershed survey was designed to serve two purposes:

1. Restore water quality in the Libby River Watershed by identifying existing problems associated with polluted runoff and recommending solutions.
2. Protect water quality in the Libby River Watershed from future problems associated with polluted runoff by evaluating current and future land uses.

In order to serve the purposes of this watershed survey, the following three goals were established:

1. Identify, characterize, and make general recommendations for mitigating nonpoint source pollution (i.e., polluted runoff) sites.
2. Raise public awareness about the impact that residential development and landowner activities can have on water quality.
3. Provide general information to landowners and the community on the measures they can take to protect water quality.

The first goal was accomplished by conducting a survey of the watershed for sources (sites) of polluted runoff using trained volunteers. The watershed was divided into sectors and teams of two to three volunteers were assigned a sector that they surveyed by car or on foot. When the teams found a source of polluted runoff, they documented the location, land use, type of polluted runoff, impacted resources, and recommendations to cleanup or contain the site. They also evaluated each site according to its impact on the Libby River and the difficulty and relative cost of fixing the site. A summary of their survey findings is contained in this report.

The second goal was accomplished by reaching out to the public through articles in local newspapers, in a watershed-wide mailing to landowners, during public meetings, and in the course of the watershed survey. This report will also serve to raise public awareness by identifying and evaluating the causes and effects of polluted runoff.

The third goal was accomplished by the publication and distribution of this report to interested landowners in the Libby River Watershed and to concerned members of the greater Scarborough community. This report contains the findings from the survey and the results of related evaluations including:

• estimating the amount of impervious area (e.g., paved roads) in the watershed and determining whether it has reached a threshold where there may be water quality impacts, and;
• identifying the locations of certain invasive plant species in the watershed.