On-Line Searchable Database of Permitted Facility
Emissions and Stack Data (Isteps Database)
This ISTEPS database consists of facility permitted (allowable) emissions
and data, based on the latest permit for the facility. Actual emissions
for a facility, in compliance with its permit, will be at or less than these
levels, but this information is not available on this database or any other
currently available ADEQ database.
Every effort made to provide accurate data, but due to the limitations
of the database and its uses, the information may not totally reflect events
at a particular source. For definitive information, the permit and/or the
permit application should be reviewed. Permits are available on-line for
most sources, permit application information is available at our
Central Files location. Please
refer to the Public Outreach and Assistance
Division section of the web site.
- Pollutants are identified by name, chemical structure
or number. Pollutants that are indicated by numbers refer to the CAS
number or Chemical Abstract Service number, a system used to identify
any chemical by a unique number.
- A stack designates that there is an actual stack or point
exhaust, as opposed to a fugitive or general emission area. Stacks have
height, diameter, exhaust temperature and flow. Stacks are associated
with points, though a point does not necessarily have a stack.
- A point is a specific activity or piece of equipment,
for example a spray booth or boiler. Many points have multiple
pollutants. Numbering convention is 3 digits XYX, the first two
(2) digits designate a unique point, the third digit is pollutant identifier.
For example 021 is SO2 (Sulfur Dioxide) on point 02, and 023 would be
CO (Carbon Monoxide) emissions on the same point.
- Not all points have a stack associated with them.