Carbon audit report 2024/2025

Summary and emissions overview

Annually, Tonbridge and Malling Borough Council (TMBC) produce a carbon audit. This audit details the carbon dioxide equivalent emissions (CO2e) from TMBC’s owned estate and operations for the previous fiscal year. This allows for consistent monitoring of emissions over time, highlighting how TMBC is progressing towards meeting its 2030 carbon neutral aspiration.

Carbon audits are developed by TMBC in accordance with the Greenhouse Gas Protocol ‘Corporate Accounting and Reporting Standard and the ‘Environmental Reporting Guidelines’ developed by the Department of Business, Energy, and Industrial Strategy (BEIS). All emissions were calculated using official greenhouse gas conversion factors published by the Department for Energy Security and NetZero, and Defra(1).

In 2024/25 TMBC emitted 3,479.2 tonnes of carbon dioxide equivalent(2) (tCO2e).

Scope emissions

The following section provides and overview of TMBCs emissions scopes:

Scope 1: Gas consumption, TMBC vehicle fleet.
Scope 2: Electricity consumption.
Scope 3: Leisure facilities, Refuse Collection Vehicles (contracted), TMBC business travel, TMBC commuting, Grounds maintenance (contracted), transmission and distribution losses, water supply, water treatment. Renewable generation:
Renewable Energy Guarantee of Origin (REGO) electricity tariff.

Emissions overview

Emissions Year	2019/20	2020/21	2021/22	2022/23	2023/24	2024/25
Scope 1	139.0	148.7	143.6	127.8	111.6	130.7
Scope 2	198.0	145.6	131.0	99.9	78.1	109.6
Scope 3	3,266.7	2,592.3	3,049.0	3,170.6	3,137.5	3,349.6
Total Gross Emissions	3,603.7	2,886.6	3,323.6	3,398.3	3,327.2	3,589.9
Renewable Generation	0.0	0.0	133.5	100.9	78.1	110.7
Total Net Emissions	3,603.7	2,886.6	3,190.1	3,297.4	3,249.1	3,479.2

Emissions breakdown

Category	Emissions Source	Consumption	Unit	tCO₂e
Scope 1	Gas Consumption	677,243	kWh	123.87
Scope 1	LPG Consumption	–	tonnes	–
Scope 1	Oil Consumption	–	litres	–
Scope 1 – Council Vehicle Fleet	Diesel Vehicle	1,628	litres	4.09
Scope 1 – Council Vehicle Fleet	Petrol Vehicle	1,300	litres	2.71
Scope 1 – Council Vehicle Fleet	Gas Oil	–	litres	–
Total Scope 1	–	–	–	130.7
Scope 2	Electricity Consumption	529,496	kWh	109.63
Total Scope 2	–	–	–	109.63
Scope 3	Transmission & Distribution Losses	529,496	kWh	9.96
Scope 3	Water Supply	2,397	m³	0.37
Scope 3	Water Treatment	2,277	m³	0.42
Scope 3 – Business Travel	Car – conventional engine	76,162	miles	20.20
Scope 3 – Business Travel	Car – hybrid	164	miles	0.03
Scope 3 – Business Travel	Car – electric	2,542	miles	0.18
Scope 3 – Business Travel	Bus passenger	–	km	–
Scope 3 – Business Travel	Taxi passenger	–	km	–
Scope 3 – Business Travel	Rail passenger	–	km	–
Scope 3 – Business Travel	Ferry passenger	–	km	–
Scope 3 – Business Travel	Plane passenger	–	km	–
Scope 3 – Commuting	Diesel Car	88,470	miles	23.7
Scope 3 – Commuting	Petrol Car	271,330	miles	72.4
Scope 3 – Commuting	Hybrid Car	35,150	miles	6.6
Scope 3 – Commuting	Electric Car	9,415	miles	0.66
Scope 3 – Commuting	Van	37,660	miles	15.17
Scope 3 – Commuting	Motorbike	–	miles	–
Scope 3 – Commuting	Train passenger	–	km	–
Scope 3 – Contractor Travel	Refuse Collection Vehicles	434,491	litres	1,091.6
Scope 3 – Leisure Centres	Electricity	2,957,882	kWh	612.43
Scope 3 – Leisure Centres	Gas	7,548,357	kWh	1,380.59
Scope 3 – Leisure Centres	Kerosene	12,396	litres	31.49
Scope 3 – Leisure Centres	Diesel	10,181	litres	25.58
Scope 3 – Leisure Centres	Petrol	2,142	litres	4.46
Scope 3 – Leisure Centres	HVO	360	litres	1.01
Scope 3 – Leisure Centres	Water Supply	53,549	m³	8.2
Scope 3 – Leisure Centres	Water Treatment	50,872	m³	9.45
Scope 3 – Leisure Centres	Grey Fleet	16,436	miles	4.41
Scope 3 – Leisure Centres	Waste DMR	81	tonnes	0.52
Scope 3 – Leisure Centres	Waste Municipal	219	tonnes	1.40
Scope 3 – Grounds Maintenance	Electricity	5,088	kWh	1.05
Scope 3 – Grounds Maintenance	Diesel	9,146	litres	22.98
Scope 3 – Grounds Maintenance	Petrol	2,111	litres	4.40
Scope 3 – Grounds Maintenance	Gas Oil	–	litres	–
Scope 3 – Grounds Maintenance	Water Supply	3,068	m³	0.47
Scope 3 – Grounds Maintenance	Water Treatment	2,915	m³	0.54
Scope 3 – Grounds Maintenance	Waste Composting / Anaerobic Digestion	32.8	tonnes	0.29
Scope 3 – Grounds Maintenance	Municipal Waste / Combustion	42.3	tonnes	0.27
Total Scope 3	–	–	–	3,349.6
TMBC Gross Emissions Total	–	–	–	3,589.9
Renewable Generation (REGO)	534,584	kWh	110.7
TMBC Net Emissions Total	–	–	–	3,479.18

Reporting period

This reporting period is from 01/04/2024 to 31/03/2025.

Notes

1 - Government conversion factors for company reporting of greenhouse gas emissions - GOV.UK (www.gov.uk)

2 - Carbon Dioxide Equivalent (CO2e) = Carbon Dioxide, Methane and Nitrous Oxide represented as one equivalent unit, to measure the climate change impact of multiple gasses under one metric.