Point Petre is a small peninsula on the eastern end of Lake Ontario, about 160 km east of Toronto and approximately 85 km north of Rochester, NY. The sampling site is located on a 25 acre parcel of land on the southern tip of Prince Edward County, which is a lightly populated rural region. The largest town in the county is Picton (pop. 4,487 in 2011), about 20 km north of the site. Other nearby towns are Belleville (pop. 49,454 in 2011), 36 km north of the site and Trenton (pop. 19,374 in 2001), 45 km to the northwest. The samplers are located on a 20 by 20 meter wood deck approximately 50 meters from the lake, in a cleared area of roughly 37 meters in diameter. The southwest face of the deck is open to the water. Surrounding the clearing from northwest to southeast are low trees and shrubs of mixed varieties. Tree heights are generally in the three to five meter height range, with a few to the southeast nearing ten meters. Shallow soil supports a variety of grasses, with large outcroppings of limestone bedrock prevalent. The area surrounding the site contains mixed brush, a small wooded area, agricultural land (corn), and some summer cottages. Two small station buildings, one a former residence (no longer occupied since 2011), lie 200 meters from the site. The station building is electrically heated to minimize local emissions. Access to the Pt. Petre property is provided by means of an all-season gravel road, entering the property from the northeast. This gravel road connects to a main country road two km to the north. Vehicles are permitted on the access roadway on non-sampling days to deliver and remove equipment and/or supplies. Traffic on all nearby roads is very light at all times. The main local industries are dairy farms and fruit production. Belleville has several current and former manufacturing facilities including Procter and Gamble, Nortel, ExxonMobil Chemical Films Canada and others. Trenton is a military base with a busy military airport. Highway 401, a major east-west link in Ontario, is 40 km north of the site. In order to evaluate and compare the various sampling techniques used by the groups involved in data collection for IADN/GLB, Pt. Petre has been established as an intercomparison site. Sampling equipment from each group is located there, and the resulting measurements are examined to see if the different techniques produce similar results.

* Data presented here are those acquired by Indiana University for the Integrated Atmospheric Deposition Network as part of QA/QC activities. The official data for this site can be found in the Government of Canada Open Data Portal .