The Hamilton Air Monitoring Network consists of 14 monitors
with industrial partners financing 12 of them. The commitment of
partners is not ensured, and the departure of one requires that the
remaining parties fill the funding gap. This network that relies on
private funding is a useful case study in identifying the criticality of
each monitor because it may be necessary to assess the number of
units that can be operated or maintained if any of the current
partners decide to leave the group. Eight of the 14 stationary
monitors measure particulate matter 10 mm or less in aerodynamic
diameter (PM10). The data used in this paper are a time-series of
one-hour average concentrations beginning January 1st, 2011 and
concluding on December 31st, 2011