1. Update on Environmental Performance of
Electric Generating Plants in Texas
February 2, 2010
Legislative advertising paid for by: John W. Fainter, Jr. • President and CEO Association of Electric Companies of Texas, Inc.
1
1005 Congress, Suite 600 • Austin, TX 78701 • phone 512-474-6725 • fax 512-474-9670 • www.aect.net

2. Average Emission Rates of Nitrogen
Oxides from Existing Texas and
U.S. Power Plants
0.6
Nation
0.5
Texas
0.4
NOx (lb/MMBtu)
0.3
0.2
0.1
0
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Notes:
NOx Emission Rates for New Coal-Fired Power Plants range from 0.05 to 0.08 pounds per million Btu
NOx Emission Rates for New Gas-Fired Power Plants are approx. 0.015 pounds per million Btu
Source: EPA Acid Rain Database, 2008 2

3. Texas’ Electric Generating Plants
Among Lowest NOx Emitters
in the Nation NOx
0.800
0.700
Texas has the 9th
0.600
lowest average NOx
NOx (lb/MMBtu)
emissions rate.
0.500
0.400
0.300
U.S. Average-
0.222 lb/mmBtu
0.200
0.100
0.000
NJ
ND
NE
OH
UT
IN
TN
IL
FL
NY
NH
NM
MN
WI
WY
DE
SD
KY
PA
MI
MT
MD
OK
AL
MS
MO
WV
GA
IA
LA
NC
VT
WA
NV
OR
TX
MA
ME
RI
ID
KS
CO
DC
VA
AR
AZ
SC
CT
CA
3
EPA Acid Rain Database, 2008

4. Texas Is Already Leading the Way
in Clean Power Plants
Texas has the largest emissions of any state since
it produces ~80% more power than the next ranked state.
0.247
0.395 OK 0.223
NM AR
0.156
0.103 LA
TX
2008 NOx Emission
Rate Averages
Area (lbs/mmBtu)
Over 80% of the fossil-fueled National 0.222
electricity produced in Texas
Texas 0.103
comes from East Texas.
Source: EPA Clean Air Markets Division – 2008 Acid Rain Program Data 4

5. Texas’ Electric Generating Plants
Among Lowest SO2 Emitters
in the Nation SO2 Rank
1.800
1.600
1.400
Texas has the 19th
lowest average SO2
SO2 (lb/MMBtu)
emissions rate.
1.200
1.000
0.800
U.S. Average-
0.600 0.564 lb/mmBtu
0.400
0.200
0.000
NJ
OH
IN
ND
NH
TN
NE
IL
FL
NY
UT
MN
NM
WI
DE
WY
MD
PA
GA
MI
AL
WV
KY
MO
SD
NC
IA
MS
MA
TX
OK
LA
MT
OR
NV
ME
WA
VT
RI
ID
VA
SC
DC
KS
AR
CO
AZ
CT
CA
5
EPA Acid Rain Database, 2008

6. 1995-2008 Emission Rate Trends
Sulfur Dioxide Nitrogen Oxides Carbon Dioxide
(SO2) (NOx) (CO2)
lb./mmBtu lb./mmBtu lb./mmBtu
Year Nation Texas Nation Texas Nation Texas
1995 1.086 0.517 0.551 0.313 206.44 159.58
1996 1.096 0.527 0.518 0.314 195.51 171.98
1997 1.093 0.523 0.509 0.310 194.06 172.20
1998 1.058 0.485 0.481 0.307 192.26 167.61
1999 0.999 0.481 0.440 0.286 193.45 168.78
2000 0.875 0.380 0.399 0.261 191.68 166.35
2001 0.843 0.385 0.373 0.221 189.81 165.98
2002 0.794 0.384 0.348 0.173 188.82 166.04
2003 0.815 0.390 0.320 0.142 189.96 171.26
2004 0.779 0.353 0.286 0.124 188.75 173.38
2005 0.753 0.349 0.268 0.116 187.18 166.51
2006 0.702 0.338 0.255 0.111 186.22 165.75
2007 0.644 0.321 0.237 0.103 184.90 166.56
2008 0.564 0.316 0.222 0.103 186.43 171.65
1995 - 2002 data are from the Acid Rain Program Scorecard Table B1
2003 - 2006 data are from the Clean Air Markets Division database for the Acid Rain Program 6