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Exhibit 99.7
Last updated 10/27/05
 Pinnacle West Capital Corporation
Quarterly Consolidated Statistical Summary
Glossary of Terms
 Amounts Recovered Through Revenues
    
    Amounts recovered from retail customers through
the power supply adjustor in the
current period.Arizona Job Growth
    
    Percentage growth over the prior year in total
non-farm payroll employment for the state of
Arizona, non-seasonally adjusted.Building Permits  Metro Phoenix
    
    The number of residential dwellings permitted to
be built by authorized agencies in Maricopa
County, Arizona. Single-family refers to
detached buildings intended to be occupied by one
family each. Multi-family permits represent the
number of units authorized to be built in
condominium, townhouse and apartment complexes.Capacity Factor
    
    The ratio of the average operating load of an
electric power generating unit for a period of
time to the capacity rating of the unit during
that period.Change in Mark-To-Market Value of Forward Sales
    
    The gross margin related to the change in
mark-to-market value in the current period of
transactions which have been entered into during
the current period or prior periods for which the
commodities are scheduled for delivery in a
future period.Deferred Fuel and Purchased Power Costs 
Current Period
    
    Deferrals recorded in the period for recovery or
refund to the extent actual retail fuel and
purchased power costs vary from the amount
included in base retail rates (currently
$0.020743 per kWh).Deferred Fuel and Purchased Power
Regulatory Asset
    
    Balance of accumulated deferrals, net of
amounts recovered through revenues, recorded
for recovery or refund to the extent actual retail
fuel and purchased power costs vary from the
amount included in base retail rates
(currently $0.020743 per kWh).Degree-Days  Cooling
    
    A measure of temperatures designed to indicate
the amount of electricity demand for cooling
purposes. Cooling degree-days are calculated by
summing the difference between each days actual
average temperature and a base temperature of
65°F for the month. Average temperatures less
than the base temperature are ignored.




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- 2 - Degree-Days  Heating
    
    A measure of temperatures designed to
indicate the amount of electricity demand for
heating purposes. Heating degree-days are
calculated by summing the difference between
each days actual average temperature and a
base temperature of 65°F for the month.
Average temperatures greater than the base
temperature are ignored.Electricity and Other Commodity Sales, Realized
    
    Marketing and trading gross margin related to
electricity and other commodities that were
delivered in the then-current period.Electricity Spot Prices Palo Verde  Off-Peak
    
    Electricity average daily spot prices at Palo
Verde substation during off-peak hours. It
measures electric prices at the producer
level and is the result of real time prices
used for benchmarking, price comparisons, and
establishing price contracts. Measured in
dollars per megawatt-hour.Electricity Spot Prices  Palo Verde  On-Peak
    
    Electricity average daily spot prices at Palo
Verde substation during on-peak hours. It
measures electric prices at the producer
level and is the result of real time prices
used for benchmarking, price comparisons, and
establishing price contracts. Measured in
dollars per megawatt-hour.Electricity Spot Prices  SP15  Off-Peak
    
    Electricity average daily spot prices at SP15,
a region of California substations, during
off-peak hours. It measures electric prices
at the producer level and is the result of
real time prices used
for benchmarking, price comparisons, and
establishing price contracts. Measured in
dollars per megawatt-hour.Electricity Spot Prices  SP15  On-Peak
    
    Electricity average daily spot prices at
SP15, a region of California substations,
during on-peak hours. It measures electric
prices at the producer level and is the
result of real time prices used
for benchmarking, price comparisons, and
establishing price contracts. Measured in
dollars per megawatt-hour.Generation Capacity Out of Service and
Replaced for Native Load
    
    Total capacity required and economic, yet
unavailable for retail customers and
traditional wholesale contracts due to
scheduled or unscheduled outages. Measured
in megawatts per day.Generation Production  Coal
    
    Amount of net energy produced by coal-fueled
generators. Measured in gigawatt-hours.




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- 3 - Generation Production  Gas/Oil/Other
    
    Amount of net energy predominately produced by
natural gas and oil-fueled generators. A small
amount of energy from hydroelectric and solar power
plants is also included. Measured in
gigawatt-hours.Generation Production  Nuclear
    
    Amount of net energy produced by nuclear-fueled
generators. Measured in gigawatt-hours.Gigawatt-hour (GWH)
    
    A unit of energy equivalent to 1,000 megawatt-hours
or 1,000,000 kilowatt-hours.Marketing and Trading Gross Margin  Pretax
    
    Revenues from marketing and trading activities
(other than retail sales, traditional wholesale
sales and retail load hedge management) less the
costs of the related commodities, with
mark-to-market gains or losses, before income
taxes.Mark-To-Market
    
    Adjustments to revenues or costs to recognize value
of sales and purchase contracts, for which the
commodities are scheduled for delivery in a future
period, at current forward wholesale prices.Mark-To-Market Reversals on Realized Sales
    
    The reversal of the gross margin related to
mark-to-market transactions entered into in prior
periods for which the commodities were delivered in
the current period. Realization of prior-period
mark-to-market relates to cash flow recognition,
not revenue recognition or earnings recognition,
because in accordance with mark-to-market
accounting, the margin was already recorded in the
prior period. A negative amount shown in this
category represents the arithmetic opposite of a
gain recognized in the period in which the
commodities were delivered; an equal positive
amount is reflected in the realized revenue or
margin for delivered commodities. A positive
amount shown in this category represents the
arithmetic opposite of a loss recognized in the
period in which the commodities were delivered; an
equal negative amount is reflected in the realized
revenue or margin for delivered commodities.Megawatt (MW)
    
    One million watts.Megawatt-hour (MWh)
    
    A unit of energy equivalent to 1,000 kilowatt-hours.Native Load
    
    Retail and wholesale sales supplied under
traditional cost-based rate regulation.Off-System Sales
    
    Sales of electricity from generation owned or
contracted by the company that is over and above
the amount required to serve retail customers and
traditional wholesale contracts.




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- 4 - Power Supply Adjustor (PSA)
    
    Power supply adjustor provides for recovery
or refund of variations in actual fuel and
purchased power costs compared with the
amount included in base retail rates
(currently $0.020743 per kWh) subject to certain specified parameters.Purchased Power  Firm Load
    
    Power purchased from wholesale market sources used
to serve regulated retail demand and traditional
wholesale contracts. Measured in gigawatt-hours.Purchased Power  Marketing and Trading
    
    Power purchased from wholesale market sources used
to serve marketing and trading sales not served by
company-owned generation. Measured in
gigawatt-hours.Realized and Mark-to-Market Components
    
    Marketing and trading gross margin, before income
taxes, for off-system sales and for sales and
purchases of electricity and other commodities by
the company in the wholesale market, summarized by
the period of delivery and whether the margin is
realized or mark-to-market. Realized margins
relate to commodities that have been delivered.
Mark-to-market margins relate to commodities that
have delivery dates in future periods.Retail Customer Growth
    
    Percentage growth over the prior year in the number
of retail customers.Retail Electricity Usage
    
    Total retail sales for a period divided by the
average retail customers for the same period.
Measured in kilowatt-hours per average customer.Retail Load Hedge Management
    
    Wholesale sales to liquidate electricity purchases
originally intended to meet firm load during peak
times, which purchases were not needed ultimately
for firm load. These sales are made to other
electric companies, power marketers, or public
entities for the purpose of resale. Measured in
gigawatt-hours.Retail Sales
    
    Sales of electricity made directly to retail
customers or ultimate customers. Residential retail
sales are sales to households. Business retail
sales include commercial, industrial, irrigation,
and streetlighting sales. Measured in
gigawatt-hours.System Peak Demand
    
    The demand for electricity during the one hour of
highest use each month. Measured in megawatts.Traditional Contracts
    
    Wholesale sales resulting from unique cost-based,
long-term contracts held by the company with
various entities for the supply of electricity at
agreed-upon prices.




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- 5 - Weather Normalized
    
    Adjusted to exclude the effects of abnormal
weather patterns.Wholesale Sales of Electricity
    
    All wholesale sales of electricity not
accounted for in sales under traditional
contracts or retail load hedge management.
These sales are made to other electric
companies, power marketers, or public
entities for the purpose of resale.
Measured in gigawatt-hours.