83 Ill. Adm. Code 600.130
Pressure Record
Section 600
Section 600.130 Pressure
Record
a) Each utility furnishing service within a given contiguous
service area to 300 or more customers or a population equivalent of 1,000
persons shall maintain a graphic pressure gauge located at its plant or at some
central point in the distribution system where continuous records shall be made
of the pressure in the mains at that point. All records or charts shall be
identified, dated and filed chronologically and shall be open to inspection by
the public.
b) Each utility shall furnish and place other recording pressure
gauges at such locations and for such periods as may be determined by the
Commission.