ESG Report | Environment | Contact Energy

280Operational greenhouse gas footprint (material sites and fuels)

Group Scope 1 emissions

	FY25	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Fuel used for thermal generation (tCO2e)	524,434	727,962	339,828	604,929	866,013	722,834	777,467	960,926
Fuel used for geothermal generation (tCO2e)	215,355	219,170	186,454	181,615	178,524	199,965	207,436	213,772
Total fuel used for generation (tCO2e)	739,790	947,131	526,282	786,544	1,044,537	922,799	984,903	1,174,698
Fuel used in ancillary equipment (tCO2e)*	155	-	-	-	-	-	-	-
Fuel used in vehicles (tCO2e)	409	332	307	297	178	270	880	1,072
Fugitive emissions - SF6 (tCO2e)	114	28	32	1	29	4	122	2
Total Scope 1	740,468	947,491	526,621	786,842	1,044,744	923,073	985,905	1,175,772
Thermal generation emission intensity (tCO2e per MWh)	0.482	0.449	0.657	0.537	0.518	0.502	0.517	0.505
Geothermal generation emission intensity (tCO2e per MWh)	0.047	0.065	0.059	0.055	0.057	0.06	0.06	0.06
Total generation emission intensity (tCO2e per MWh)	0.083	0.11	0.069	0.094	0.123	0.108	0.110	0.135

_{*Emissions from ancillary equipment moved from scope 3 and recalculated for improved accuracy. Includes combustion of diesel in ancillary equipment at generation sites.}

_{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	FY25	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Indirect Emissions (Scope 2)	Electricity consumption	1,180	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	3	2	3	2	N/A	N/A	N/A	N/A
	Subtotal	1,183	975	1,957	1,399	1,303	1,258	1,374	1,397
Indirect Emissions (Scope 3)	Purchased goods and services	8,799	6,522	6,197	6,371	16,699	11,915	35,267	47,507
	Capital goods	87,203	79,185	88,266	57,876	41,726	18,052	6,536	13,899
	Fuel and energy-related activities	8,006	5,130	1,050	149,743	330,207	91,857	175,811	77,049
	Upstream distribution and transportation	205	254	108	444	27	14	628	116
	Waste	69	58	47	108	149	123	148	134
	Business travel	1,081	1,601	1,274	567	263	719	1,256	1,182
	Employee commuting	956	927	965	832	306	606	2	2
	Use of sold products	250,612	170,929	175,603	178,554	165,259	166,310	301,640	370,168
	Downstream leased assets	399	429	164	289	399	306	445	586
	Franchises	N/A	N/A	N/A	N/A	N/A	N/A	2,069	4,536
	Investments**	12,313	-	-	-	-	-	-	-
	Subtotal	369,583	265,034	273,673	394,784	555,036	277,987	523,802	515,179
Total (Scope 1, 2 and 3)		1,111,234	1,213,500	802,252	1,183,025	1,601,083	1,202,317	1,511,081	1,692,348

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

_{**Emissions from investments calculated for the first time in FY25 due to beginning of construction of Kōwhai Park Solar farm under Joint Venture.}

_{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.}

Other emissions (metric tonnes)

Emissions	FY25	FY24	FY23	FY22	FY21	FY20	FY19
NOx	66.2	176.65	94.42	89.73	123.36	107.5	131
SOx	32.94	46.77	11.33	27.48	38.53	35.57	40.56
Dust	35.93	49.41	12.14	29.06	41.96	37.98	43.32
Direct Mercury		0.0064	0.21	0.20	0.08	0.17	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	FY25	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Non-renewable fuels (nuclear fuels, coal, oil, natural gas, etc.) purchased and consumed (MWh)*	2,605,280	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)**		26,298,055	24,819,078	25,872,972	24,847,455	25,567,387	25,664,747	25,622,555
Renewable Generation	88%	81%	93%	87%	81%	83%	83%	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

	FY25	FY24	FY23	FY22	FY21	FY20
Revenue from thermal coal (NZD)	$0	$0	$0	$0	$0	$0
Revenue from diesel (NZD)	$11.7m	$1.1m	$1.2m	$2.4m	$7.5m	$1m

Waste

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

	FY25	FY24	FY23	FY22	FY21	FY20	FY19	FY18
Total waste generated (metric tonnes)	134	121	104	91.7	132	108.6	126.1	109
Total waste used/recycled/sold (metric tonnes)	9.3	6.9	6.5	0.7	6	3.6	3.4	0

Hazardous waste

	FY24	FY23	FY22
Hazardous waste landfilled (tonnes)	0.1	-	-
Hazardous waste incinerated with energy recovery (tonnes)	81	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)	2.7	1	5
Total hazardous waste disposed	>83.8	>50	>26
Total hazardous waste recycled/reused	-	-	-