ESG Report | Environment | Contact Energy

Operational greenhouse gas footprint (material sites and fuels)

Group Scope 1 emissions

	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Fuel used for thermal generation (tCO2e)	727,962	339,828	604,929	866,013	722,834	777,467	960,926
Fuel used for geothermal generation (tCO2e)	219,170	186,454	181,615	178,524	199,965	207,436	213,772
Total fuel used for generation (tCO2e)	947,131	526,282	786,544	1,044,537	922,799	984,903	1,174,698
Fuel used in vehicles (tCO2e)	332	307	297	178	270	880	1,072
Fugitive emissions - SF6 (tCO2e)	28	32	1	29	4	122	2
Total Scope 1	947,491	526,621	786,842	1,044,744	923,073	985,905	1,175,772
Thermal generation emission intensity (tCO2e per MWh)	0.449	0.657	0.537	0.518	0.502	0.517	0.505
Geothermal generation emission intensity (tCO2e per MWh)	0.065	0.059	0.055	0.057	0.06	0.06	0.06
Total generation emission intensity (tCO2e per MWh)	0.11	0.069	0.094	0.123	0.108	0.110	0.135

Fuel used for thermal generation (tCO2e)
FY24	727,962
FY23	339,828
FY22	604,929
FY21	866,013
FY20	722,834
FY19	777,467
FY18	960,926

Fuel used for geothermal generation (tCO2e)
FY24	219,170
FY23	186,454
FY22	181,615
FY21	178,524
FY20	199,965
FY19	207,436
FY18	213,772

Total fuel used for generation (tCO2e)
FY24	947,131
FY23	526,282
FY22	786,544
FY21	1,044,537
FY20	922,799
FY19	984,903
FY18	1,174,698

Fuel used in vehicles (tCO2e)
FY24	332
FY23	307
FY22	297
FY21	178
FY20	270
FY19	880
FY18	1,072

Fugitive emissions - SF6 (tCO2e)
FY24	28
FY23	32
FY22	1
FY21	29
FY20	4
FY19	122
FY18	2

Total Scope 1
FY24	947,491
FY23	526,621
FY22	786,842
FY21	1,044,744
FY20	923,073
FY19	985,905
FY18	1,175,772

Thermal generation emission intensity (tCO2e per MWh)
FY24	0.449
FY23	0.657
FY22	0.537
FY21	0.518
FY20	0.502
FY19	0.517
FY18	0.505

Geothermal generation emission intensity (tCO2e per MWh)
FY24	0.065
FY23	0.059
FY22	0.055
FY21	0.057
FY20	0.06
FY19	0.06
FY18	0.06

Total generation emission intensity (tCO2e per MWh)
FY24	0.11
FY23	0.069
FY22	0.094
FY21	0.123
FY20	0.108
FY19	0.110
FY18	0.135

_{Generation intensities consist of thermal/geothermal/total generation emissions (tCO2e) divided by the thermal/geothermal/total generation volume (MWh), including Te Rapa direct sales.
Some prior year intensity figures have been updated compared to what has been included in past integrated reports (which excluded Te Rapa direct sales). However, we think this now consistently and better reflects the emission intensity levels. Te Rapa was closed in June 2023 so will not be included in intensity calculations going forward.}

Group Scope 2 and 3 emissions

All categories are measured in tCO2e

Scope	Category	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Indirect Emissions (Scope 2)	Electricity consumption	973	1,950	1,394	1,300	1,258	1,374	1,397
	Simply Energy - electricity consumption	-	4	3	3	N/A	N/A	N/A
	Western Energy - electricity consumption	2	3	2	N/A	N/A	N/A	N/A
	Subtotal	975	1,957	1,399	1,303	1,258	1,374	1,397
Indirect Emissions (Scope 3)	Purchased goods and services	6,522	6,197	6,371	16,699	11,915	35,267	47,507
	Capital goods	79,185	88,266	57,876	41,726	18,052	6,536	13,899
	Fuel and energy-related activities	5,130	1,050	149,743	330,207	91,857	175,811	77,049
	Upstream distribution and transportation	254	108	444	27	14	628	116
	Waste	58	47	108	149	123	148	134
	Business travel	1,601	1,274	567	263	719	1,256	1,182
	Employee commuting	927	965	832	306	606	2	2
	Use of sold products	170,929	175,603	178,554	165,259	166,310	301,640	370,168
	Downstream leased assets	429	164	289	399	306	445	586
	Franchises	N/A	N/A	N/A	N/A	N/A	2,069	4,536
	Subtotal	265,034	273,673	394,784	555,036	277,987	523,802	515,179
Total (Scope 1, 2 and 3)		1,213,500	802,252	1,183,025	1,601,083	1,202,317	1,511,081	1,692,348

Scope
Indirect Emissions (Scope 2)
Category	Electricity consumption
FY24	973
FY23	1,950
FY22	1,394
FY21	1,300
FY20	1,258
FY19	1,374
FY18	1,397


Category	Simply Energy - electricity consumption
FY24	-
FY23	4
FY22	3
FY21	3
FY20	N/A
FY19	N/A
FY18	N/A


Category	Western Energy - electricity consumption
FY24	2
FY23	3
FY22	2
FY21	N/A
FY20	N/A
FY19	N/A
FY18	N/A


Category	Subtotal
FY24	975
FY23	1,957
FY22	1,399
FY21	1,303
FY20	1,258
FY19	1,374
FY18	1,397

Indirect Emissions (Scope 3)
Category	Purchased goods and services
FY24	6,522
FY23	6,197
FY22	6,371
FY21	16,699
FY20	11,915
FY19	35,267
FY18	47,507


Category	Capital goods
FY24	79,185
FY23	88,266
FY22	57,876
FY21	41,726
FY20	18,052
FY19	6,536
FY18	13,899


Category	Fuel and energy-related activities
FY24	5,130
FY23	1,050
FY22	149,743
FY21	330,207
FY20	91,857
FY19	175,811
FY18	77,049


Category	Upstream distribution and transportation
FY24	254
FY23	108
FY22	444
FY21	27
FY20	14
FY19	628
FY18	116


Category	Waste
FY24	58
FY23	47
FY22	108
FY21	149
FY20	123
FY19	148
FY18	134


Category	Business travel
FY24	1,601
FY23	1,274
FY22	567
FY21	263
FY20	719
FY19	1,256
FY18	1,182


Category	Employee commuting
FY24	927
FY23	965
FY22	832
FY21	306
FY20	606
FY19	2
FY18	2


Category	Use of sold products
FY24	170,929
FY23	175,603
FY22	178,554
FY21	165,259
FY20	166,310
FY19	301,640
FY18	370,168


Category	Downstream leased assets
FY24	429
FY23	164
FY22	289
FY21	399
FY20	306
FY19	445
FY18	586


Category	Franchises
FY24	N/A
FY23	N/A
FY22	N/A
FY21	N/A
FY20	N/A
FY19	2,069
FY18	4,536


Category	Subtotal
FY24	265,034
FY23	273,673
FY22	394,784
FY21	555,036
FY20	277,987
FY19	523,802
FY18	515,179

Total (Scope 1, 2 and 3)
Category
FY24	1,213,500
FY23	802,252
FY22	1,183,025
FY21	1,601,083
FY20	1,202,317
FY19	1,511,081
FY18	1,692,348

_{*Simply Energy Scope 2 emissions data now combined with Contact Energy.}

_{Note: The completion of a swaption deal with Genesis in late 2022 resulted in the large reduction of scope 3 emissions in the ‘Fuel and energy-related activities’ category for FY23. For more info on our emissions, see our Greenhouse Gas Inventory.}

Geothermal assets at 30 June 2023

Geothermal assets at 30 June 2023	Book value ($m)	Generation (GWh)	Emissions (tCO2e)	Emissions intensity (gCO2e/KWh)	Compliance with CBI standards (<100 gCO2e/KWh)
Poihipi	137	308	12,090	39	Yes
Tauhara	917	-	-	N/A	Yes
Te Mihi	466	1,380	50,643	37	Yes
Te Huka	98	176	8,684	49	Yes
Wairākei	743	998	19,456	19	Yes
Te Huka expansion	107	-	-	N/A	Yes
Tenon & Nature's Flame¹	8	195	1,577	8	Yes
Ohaaki²	108	323	94,004	291	No
Geothermal portfolio total/average	2,584	3,380	186,454	55
Eligible Green Asset total/average	2,476	3,057	92,449	30
Total Eligible Green Debt Instruments	1,474
Green Asset Ratio³	1.68

Geothermal assets at 30 June 2023
Poihipi
Book value ($m)	137
Generation (GWh)	308
Emissions (tCO2e)	12,090
Emissions intensity (gCO2e/KWh)	39
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Tauhara
Book value ($m)	917
Generation (GWh)	-
Emissions (tCO2e)	-
Emissions intensity (gCO2e/KWh)	N/A
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Te Mihi
Book value ($m)	466
Generation (GWh)	1,380
Emissions (tCO2e)	50,643
Emissions intensity (gCO2e/KWh)	37
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Te Huka
Book value ($m)	98
Generation (GWh)	176
Emissions (tCO2e)	8,684
Emissions intensity (gCO2e/KWh)	49
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Wairākei
Book value ($m)	743
Generation (GWh)	998
Emissions (tCO2e)	19,456
Emissions intensity (gCO2e/KWh)	19
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Te Huka expansion
Book value ($m)	107
Generation (GWh)	-
Emissions (tCO2e)	-
Emissions intensity (gCO2e/KWh)	N/A
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Tenon & Nature's Flame¹
Book value ($m)	8
Generation (GWh)	195
Emissions (tCO2e)	1,577
Emissions intensity (gCO2e/KWh)	8
Compliance with CBI standards (<100 gCO2e/KWh)	Yes

Ohaaki²
Book value ($m)	108
Generation (GWh)	323
Emissions (tCO2e)	94,004
Emissions intensity (gCO2e/KWh)	291
Compliance with CBI standards (<100 gCO2e/KWh)	No

Geothermal portfolio total/average
Book value ($m)	2,584
Generation (GWh)	3,380
Emissions (tCO2e)	186,454
Emissions intensity (gCO2e/KWh)	55
Compliance with CBI standards (<100 gCO2e/KWh)

Eligible Green Asset total/average
Book value ($m)	2,476
Generation (GWh)	3,057
Emissions (tCO2e)	92,449
Emissions intensity (gCO2e/KWh)	30
Compliance with CBI standards (<100 gCO2e/KWh)

Total Eligible Green Debt Instruments
Book value ($m)	1,474
Generation (GWh)
Emissions (tCO2e)
Emissions intensity (gCO2e/KWh)
Compliance with CBI standards (<100 gCO2e/KWh)

Green Asset Ratio³
Book value ($m)	1.68
Generation (GWh)
Emissions (tCO2e)
Emissions intensity (gCO2e/KWh)
Compliance with CBI standards (<100 gCO2e/KWh)

_{¹Includes direct heat sold to Tenon and Nature's Flame
²Ineligible asset in relation to Contact's Green Borrowing Programme
³Calculated as Total Eligible Green Assets / Total Eligible Green Debt Instruments}_{Note: For more information on our Green Borrowing Programme, see https://contact.co.nz/about-us/sustainability/financial-sustainability.}

Other emissions (metric tonnes)

Emissions	FY23	FY22	FY21	FY20	FY19
NOx	94.42	89.73	123.36	107.5	131
SOx	11.33	27.48	38.53	35.57	40.56
Dust	12.14	29.06	41.96	37.98	43.32
Direct Mercury	0.21	0.20	0.08	0.17	0.30

Emissions
NOx
FY23	94.42
FY22	89.73
FY21	123.36
FY20	107.5
FY19	131

SOx
FY23	11.33
FY22	27.48
FY21	38.53
FY20	35.57
FY19	40.56

Dust
FY23	12.14
FY22	29.06
FY21	41.96
FY20	37.98
FY19	43.32

Direct Mercury
FY23	0.21
FY22	0.20
FY21	0.08
FY20	0.17
FY19	0.30

_{Note: All figures are best estimates based on available information. NOx is calculated on TCC data only, SOx and Dust is all thermal stations except Te Rapa. Direct Mercury is based on 80% of Geothermal gas stacks in FY21 and FY22, otherwise 100%}

Energy consumption by primary fuel source

Total energy consumption	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Non-renewable fuels (nuclear fuels, coal, oil, natural gas, etc.) purchased and consumed (MWh)*	3,523,449	1,733,583	3,032,381	4,228,588	3,699,602	3,887,061	4,767,215
Renewable fuels consumed for generation (MWh)**	TBC	34,617,597	33,590,511	32,459,295	34,212,240	33,378,084	33,766,679
	81%	93%	87%	81%	83%	83%	79%
Renewable Generation	81%	93%	87%	81%	83%	83%	79%

Total energy consumption
Non-renewable fuels (nuclear fuels, coal, oil, natural gas, etc.) purchased and consumed (MWh)*
FY24	3,523,449
FY23	1,733,583
FY22	3,032,381
FY21	4,228,588
FY20	3,699,602
FY19	3,887,061
FY18	4,767,215

Renewable fuels consumed for generation (MWh)**
FY24	TBC
FY23	34,617,597
FY22	33,590,511
FY21	32,459,295
FY20	34,212,240
FY19	33,378,084
FY18	33,766,679


FY24	81%
FY23	93%
FY22	87%
FY21	81%
FY20	83%
FY19	83%
FY18	79%

Renewable Generation
FY24	81%
FY23	93%
FY22	87%
FY21	81%
FY20	83%
FY19	83%
FY18	79%

_{*Re-calculated using conversion factor of 1 GJ = 0.277778 MWh
**Calculated using converstion factor of 1 MM Btu = 0.29307 MWh}

Revenue from non-renewable fuels

	FY24	FY23	FY22	FY21	FY20
Revenue from thermal coal (NZD)	$0	$0	$0	$0	$0
Revenue from diesel (NZD)	$1.1m	$1.2m	$2.4m	$7.5m	$1m

Revenue from thermal coal (NZD)
FY24	$0
FY23	$0
FY22	$0
FY21	$0
FY20	$0

Revenue from diesel (NZD)
FY24	$1.1m
FY23	$1.2m
FY22	$2.4m
FY21	$7.5m
FY20	$1m

Waste

Total solid waste disposed (i.e. not recycled, reused or incinerated waste for energy recovery)

	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Total waste generated (metric tonnes)	121	104	91.7	132	108.6	126.1	109
Total waste used/recycled/sold (metric tonnes)	6.9	6.5	0.7	6	3.6	3.4	0

Total waste generated (metric tonnes)
FY24	121
FY23	104
FY22	91.7
FY21	132
FY20	108.6
FY19	126.1
FY18	109

Total waste used/recycled/sold (metric tonnes)
FY24	6.9
FY23	6.5
FY22	0.7
FY21	6
FY20	3.6
FY19	3.4
FY18	0

Hazardous waste

	FY23	FY22
Hazardous waste landfilled (tonnes)		-
Hazardous waste incinerated with energy recovery (tonnes)	44	>20
Hazardous waste incinerated without energy recovery (tonnes)		-
Hazardous waste otherwise disposed (batteries collected) (tonnes)	5	>1
Hazardous waste with unknown disposal method (tonnes)	1	5
Total hazardous waste disposed	>50	>26
Total hazardous waste recycled/reused		-

Hazardous waste landfilled (tonnes)
FY23
FY22	-

Hazardous waste incinerated with energy recovery (tonnes)
FY23	44
FY22	>20

Hazardous waste incinerated without energy recovery (tonnes)
FY23
FY22	-

Hazardous waste otherwise disposed (batteries collected) (tonnes)
FY23	5
FY22	>1

Hazardous waste with unknown disposal method (tonnes)
FY23	1
FY22	5

Total hazardous waste disposed
FY23	>50
FY22	>26

Total hazardous waste recycled/reused
FY23
FY22	-