MethaneLens — Industrial Methane Emissions Calculator

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Organisation / Facility

Industry Sector

Reporting Period

Annual Production (tonnes)

Total Employees

GWP Basis (auto-set above)

ℹ️Scope 1 — Fugitive & Combustion. Natural gas systems and stationary combustion are among the largest industrial CH₄ sources. IPCC 2006 Vol.2 Ch.2 default factors. Formula: Activity × EF (kg CH₄/unit) × 0.001 = tonnes CH₄/yr → × GWP = tCO₂e.

⛽

Stationary Combustion — Fuel Burning

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.2 Ch.2 · GHG Protocol Scope 1 · EPA 40 CFR Part 98 Subpart C · DEFRA 2024 Stationary Sources

Natural Gas Burned (GJ/yr) 1.0 g CH₄/GJIPCC 2006 Table 2.2: industrial boiler 1 g/GJ

Coal Combustion (GJ/yr) 10 g CH₄/GJIPCC 2006: bituminous coal 10 g/GJ

Heavy Fuel Oil (GJ/yr) 3 g CH₄/GJIPCC 2006 Table 2.2: residual oil 3 g/GJ

Diesel Combustion (GJ/yr) 3 g CH₄/GJIPCC 2006 Table 2.2: diesel oil 3 g/GJ

LPG Combustion (GJ/yr) 1 g CH₄/GJIPCC 2006 Table 2.2: LPG 1 g/GJ

Biomass / Wood (GJ/yr) 30 g CH₄/GJIPCC 2006 Table 2.2: woody biomass 30 g/GJ

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Natural Gas System — Fugitive Leaks

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.2 Ch.4 · OGMP 2.0 Oil & Gas Methane Partnership · EPA 40 CFR Part 98 Subpart W · API Compendium 2022 · UNFCCC Category 1.B.2

Gas Processed (million m³/yr) 0.2% leak rateIPCC 2006: 0.2% system-wide fugitive loss

Compressor Seals (units) 2.0 t CH₄/unit/yrEPA API: 2.0 t CH₄/compressor/yr avg

Pneumatic Controllers (units) 0.15 t CH₄/unit/yrHigh-bleed: 0.15 t CH₄/controller/yr

Gas Venting (m³/yr) 0.717 kg CH₄/m³Intentional venting; 0.717 kg CH₄/std m³ gas

Gas Flaring (m³/yr) 0.5% CH₄ slip0.5% unburnt CH₄ slip from flares

ℹ️Scope 1 — Upstream Fugitives. Oil & gas is the 2nd largest CH₄ source globally (~63 Tg/yr per TROPOMI satellite data). IPCC 2006 Vol.2 Ch.4 and API Compendium 2022 provide Tier 1 factors. OGMP 2.0 Level 4–5 reporting recommended.

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Crude Oil Production & Refining

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.2 Ch.4 (1.B.2.a) · UNFCCC Category 1.B.2 · API Compendium 2022 · EPA 40 CFR Part 98 Subpart W · OGMP 2.0 Framework

Crude Oil Produced (kbbls/yr) 9 kg CH₄/kbblIPCC 2006 Table 4.2.5: 9 kg CH₄/1000 bbl

Oil Refinery Throughput (kt/yr) 0.19 kg CH₄/tIPCC 2006: refinery fugitives 0.19 kg CH₄/tonne

Associated Gas Flared (m³/yr) 0.5% slip0.5% CH₄ slip per m³ flared gas

Storage Tank Breathing (kbbls/yr) 0.08 kg CH₄/kbblAPI Compendium: fixed roof tanks

Pipeline Transmission (km) 1.6 kg CH₄/km/yrIPCC 2006: onshore pipeline fugitives

🌊

Natural Gas Production & Distribution

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.2 Ch.4 (1.B.2.b) · EPA 40 CFR Part 98 Subpart W · GHG Protocol Technical Guidance Series — Natural Gas · UNECE Best Practice Guide 2021

Gas Produced (million m³/yr) 3.9 kg CH₄/1000m³IPCC 2006 Table 4.2.6: exploration+production

Gas Processing Plant (million m³/yr) 0.17 kg CH₄/1000m³Processing losses: 0.17 kg/1000 m³

LNG Liquefaction (kt LNG/yr) 0.024 kg CH₄/tLiquefaction + storage boil-off losses

Distribution Mains (km) 1.1 kg CH₄/km/yrIPCC 2006: distribution losses 1.1 kg/km/yr

ℹ️Scope 1 — Fugitive CH₄ from coal seams. Underground mines emit 10–25 m³ CH₄ per tonne coal. IPCC 2006 Vol.2 Ch.4 (1.B.1). Global coal mine methane = ~33 Tg/yr (Nature Comms, 2023).

⛏️

Coal Mining — Fugitive Emissions

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.2 Ch.4 (1.B.1) · 2019 Refinement · UNFCCC Coal Mine Methane · EPA 40 CFR Part 98 Subpart FF · ISO 14064-1:2018

Underground Coal Mining (kt/yr) 10 m³ CH₄/tIPCC 2006: 10 m³ CH₄/tonne default (gassy mine)

Surface Coal Mining (kt/yr) 0.3 m³ CH₄/tIPCC 2006: open-cast 0.3 m³ CH₄/tonne

Coal Post-Mining (kt/yr) 1.5 m³ CH₄/tPost-mining handling, crushing, loading

Abandoned Mines (kt history) 0.5 m³ CH₄/t/yrIPCC 2019 Refinement: abandoned mine emissions

CH₄ Captured & Flared (%) Reduction credit% of total CH₄ captured & flared (98% destruction)

🪨

Limestone, Gypsum & Mineral Processing

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.3 Ch.2 Industrial Processes (2.A.1–2.A.4) · EPA 40 CFR Part 98 Subpart H · IPCC 2019 Refinement Vol.3

Cement Clinker (kt/yr) 0.002 kg CH₄/tTrace CH₄ from coal fuel in kilns

Lime Production (kt/yr) 0.002 kg CH₄/tSimilar to cement — combustion traces

Glass Production (kt/yr) 0.003 kg CH₄/tNatural gas fired furnaces, slip losses

ℹ️Scope 1 — Process CH₄. Steel, chemical, and petrochemical processes emit CH₄ via coke ovens, reformers, and chemical reactions. IPCC Vol.3 Ch.4–6 and EPA Subpart P & Q provide Tier 1 factors.

🔩

Iron & Steel / Metallurgy

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.3 Ch.4 (2.C.1) · 2019 Refinement · EPA 40 CFR Part 98 Subpart Q · ISO 14064-1:2018 · UNFCCC Category 2.C

Metallurgical Coke (kt/yr) 0.1 kg CH₄/tIPCC 2019 Refinement: coke oven fugitives

Pig Iron / Blast Furnace (kt/yr) 0.009 kg CH₄/tIPCC 2006 Table 4.1: blast furnace gas

Electric Arc Steel (kt/yr) 0.006 kg CH₄/tIPCC 2006 Table 4.1: EAF operations

Ferroalloys (kt/yr) 0.03 kg CH₄/tIPCC 2006 Vol.3 Ch.4: ferroalloy CH₄

Aluminium Smelting (kt/yr) 0.001 kg CH₄/tVery low; mainly PFC/CO₂ source

🧪

Chemical & Petrochemical Manufacturing

MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.3 Ch.3 (2.B) · EPA 40 CFR Part 98 Subpart P · GHG Protocol Industrial Process Guidance · CEFIC Chemical Industry EF Library

Methanol Production (kt/yr) 1.2 kg CH₄/tIPCC 2006 Table 3.4: steam reforming losses

Ammonia Production (kt/yr) 0.9 kg CH₄/tIPCC 2006 Table 3.1: Haber-Bosch CH₄ loss

Ethylene / Olefins (kt/yr) 0.24 kg CH₄/tIPCC 2006: steam cracking process CH₄

Carbon Black (kt/yr) 11.5 kg CH₄/tIPCC 2006 Table 3.8: incomplete combustion

Caprolactam (kt/yr) 0.18 kg CH₄/tIPCC 2006: adipic/caprolactam process

Hydrogen Production (kt H₂/yr) 6.0 kg CH₄/t H₂Steam methane reforming — CH₄ slip

🍞

Food & Beverage Processing

NON-MFG · SCOPE 1

Standard: IPCC 2006 GL Vol.5 Ch.6 · FAO Statistics Working Paper 21/28 · GHG Protocol Scope 1 & 3 · DEFRA 2024 Food & Drink EF Tables

Wastewater COD Load (t COD/yr) 0.028 kg CH₄/kg CODIPCC 2019: 0.028 kg CH₄/kg COD anaerobic

Anaerobic Digestion Slip (t/yr) 2% CH₄ slip2% of biogas CH₄ vented (process slip)

Brewery / Fermentation (kL/yr) 0.008 kg CH₄/kLFermentation losses, 0.008 kg CH₄/kL beer

ℹ️Scope 1 — Biogenic CH₄. Agriculture is the largest CH₄ source globally (~40%). Enteric fermentation from cattle alone = ~100 kg CH₄/head/yr. IPCC 2019 Refinement Vol.4 updated Tier 1 parameters for 2024 inventories.

🐄

Enteric Fermentation (Livestock)

AGRI · SCOPE 1

Standard: IPCC 2019 Refinement Vol.4 Ch.10 (3.A.1) · UNFCCC Category 3.A · FAO Tier 1 Default EFs · IPCC AR6 WG1 Methane Budgets 2021

Dairy Cattle (heads) 128 kg CH₄/head/yrIPCC 2019: 128 kg CH₄/head/yr S. Asia region

Beef Cattle (heads) 56 kg CH₄/head/yrIPCC 2019 Table 10.11: feedlot beef S.Asia

Buffaloes (heads) 117 kg CH₄/head/yrIPCC 2019 Refinement: Asia buffalo default

Sheep (heads) 8 kg CH₄/head/yrIPCC 2019 Table 10.11: S.Asia sheep

Goats (heads) 5 kg CH₄/head/yrIPCC 2019 Table 10.11: S.Asia goat

Swine / Pigs (heads) 1.5 kg CH₄/head/yrIPCC 2006 Table 10A.2: developing countries

💩

Manure Management

AGRI · SCOPE 1

Standard: IPCC 2019 Refinement Vol.4 Ch.10 (3.B) · MCF by Climate Zone · UNFCCC Category 3.B · 2019 Refinement MCF Tables for Warm Temperate / South Asia

Dairy Cattle Manure (heads) 16 kg CH₄/head/yrIPCC 2019: warm climate liquid lagoon MCF=0.66

Beef Cattle Manure (heads) 5 kg CH₄/head/yrIPCC 2019: dry lot / pasture, MCF=0.01

Swine Manure (heads) 10 kg CH₄/head/yrIPCC 2019: liquid lagoon, warm climate MCF=0.71

Poultry Manure (heads) 0.018 kg CH₄/head/yrIPCC 2019: solid storage, low MCF

🌾

Rice Cultivation

AGRI · SCOPE 1

Standard: IPCC 2006 GL Vol.4 Ch.5 (3.C.7) · 2019 Refinement Vol.4 · IRRI Rice Methane Database · UNFCCC Category 3.C.7

Continuously Flooded Rice (ha/yr) 1.30 kg CH₄/ha/dayIPCC 2006 Table 5.11: 120-day season, 1.30 kg/ha/day

Intermittently Flooded Rice (ha/yr) 0.60 kg CH₄/ha/dayIPCC 2006: midseason drainage, 0.60 kg/ha/day

Growing Season Length (days)Typical kharif/rabi crop: 120 days default

ℹ️Scope 1 & 3 — Waste CH₄. Landfills are the 3rd largest US CH₄ source. Anaerobic decomposition of organic waste generates CH₄. IPCC 2006 Vol.5 Ch.3 (Solid Waste) & Ch.6 (Wastewater). FOD (First Order Decay) Tier 2 method recommended.

🗑️

Solid Waste Disposal — Landfill

WASTE · SCOPE 1

Standard: IPCC 2006 GL Vol.5 Ch.3 (5.A) · 2019 Refinement Waste Chapter · EPA 40 CFR Part 98 Subpart HH · IPCC FOD Model · MCF for managed landfill = 1.0

Municipal Solid Waste (kt/yr) 6.0 kg CH₄/tIPCC 2006 Tier 1: 6 kg CH₄/t MSW to managed landfill

Industrial Solid Waste (kt/yr) 3.5 kg CH₄/tIPCC 2006: industrial organic waste to landfill

Organic / Food Waste (kt/yr) 8.0 kg CH₄/tHigh DOC: 8 kg CH₄/t food waste to landfill

LFG Captured & Flared (%) Reduction% landfill CH₄ captured — 98% destruction assumed

💧

Industrial & Domestic Wastewater Treatment

WASTE · SCOPE 1

Standard: IPCC 2006 GL Vol.5 Ch.6 (5.D) · IPCC 2019 Refinement — Wastewater (Industrial & Domestic) · FAO Working Paper 21/28 · EPA 40 CFR Part 98 Subpart II

Industrial WW COD Load (t COD/yr) 0.025 kg CH₄/kg CODIPCC 2006 Table 6.3: anaerobic lagoon treatment

Food Industry WW (t COD/yr) 0.028 kg CH₄/kg CODIPCC 2019: food industry maximum CH₄-producing cap

Domestic Sewage (million pop-eq) 11.6 kg CH₄/pop/yrIPCC 2006 Tier 1: 11.6 kg CH₄/person-eq/yr

Sludge — Anaerobic Digestion (t VS/yr) 0.26 m³ CH₄/kg VS0.26 m³ CH₄/kg VS × 0.717 kg/m³ density

🌐

International CH₄ Standards & Emission Factors — Manufacturing

Source Category	Standard / Authority	CH₄ Emission Factor	CO₂e/unit (GWP28)	IPCC Cat.
Underground Coal Mine	IPCC 2006 Vol.2 Ch.4 (1.B.1)	10 m³ CH₄/tonne coal	~20.1 kgCO₂e/t	1.B.1.a
Surface Coal Mine	IPCC 2006 Vol.2 Ch.4 (1.B.1)	0.3 m³ CH₄/tonne coal	~0.6 kgCO₂e/t	1.B.1.b
Crude Oil Production	IPCC 2006 Table 4.2.5	9 kg CH₄/1000 bbl	252 kgCO₂e/kbbl	1.B.2.a
Oil Refinery (fugitive)	IPCC 2006 / API Compendium 2022	0.19 kg CH₄/tonne throughput	5.3 kgCO₂e/t	1.B.2.a
Natural Gas Production	IPCC 2006 Table 4.2.6	3.9 kg CH₄/1000 m³ gas	109 kgCO₂e/1000m³	1.B.2.b
Gas Compressor Seal	EPA GHGRP Subpart W · API 2022	2.0 t CH₄/unit/year	56 tCO₂e/unit/yr	1.B.2.b
Pneumatic Controller	EPA GHGRP Subpart W	0.15 t CH₄/unit/year	4.2 tCO₂e/unit/yr	1.B.2.b
Metallurgical Coke Oven	IPCC 2019 Refinement Vol.3	0.1 kg CH₄/tonne coke	2.8 kgCO₂e/t	2.C.1
Blast Furnace (Iron)	IPCC 2006 Vol.3 Table 4.1	0.009 kg CH₄/tonne iron	0.25 kgCO₂e/t	2.C.1
Methanol Production	IPCC 2006 Vol.3 Table 3.4	1.2 kg CH₄/tonne methanol	33.6 kgCO₂e/t	2.B.5
Ammonia Production	IPCC 2006 Vol.3 Table 3.1	0.9 kg CH₄/tonne NH₃	25.2 kgCO₂e/t	2.B.1
Carbon Black	IPCC 2006 Vol.3 Table 3.8	11.5 kg CH₄/tonne	322 kgCO₂e/t	2.B.4
Natural Gas Combustion	IPCC 2006 Vol.2 Table 2.2	1.0 g CH₄/GJ	0.028 kgCO₂e/GJ	1.A
Coal Combustion (bituminous)	IPCC 2006 Vol.2 Table 2.2	10 g CH₄/GJ	0.28 kgCO₂e/GJ	1.A
Biomass Combustion	IPCC 2006 Vol.2 Table 2.2	30 g CH₄/GJ	0.84 kgCO₂e/GJ	1.A

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International CH₄ Standards — Agriculture, Waste & Non-Manufacturing

Source Category	Standard / Authority	CH₄ Emission Factor	CO₂e/unit (GWP28)	IPCC Cat.
Dairy Cattle (Enteric)	IPCC 2019 Refinement Vol.4 Ch.10	128 kg CH₄/head/yr	3.58 tCO₂e/head/yr	3.A.1
Beef Cattle (Enteric)	IPCC 2019 Refinement Vol.4 Ch.10	56 kg CH₄/head/yr	1.57 tCO₂e/head/yr	3.A.1
Buffalo (Enteric)	IPCC 2019 Refinement — Asia defaults	117 kg CH₄/head/yr	3.28 tCO₂e/head/yr	3.A.1
Sheep (Enteric)	IPCC 2019 Refinement Vol.4	8 kg CH₄/head/yr	224 kgCO₂e/head/yr	3.A.1
Dairy Manure (warm, liquid)	IPCC 2019 — MCF 0.66 Warm Temperate	16 kg CH₄/head/yr	448 kgCO₂e/head/yr	3.B
Swine Manure (warm lagoon)	IPCC 2019 — MCF 0.71 Warm Temperate	10 kg CH₄/head/yr	280 kgCO₂e/head/yr	3.B
Continuously Flooded Rice	IPCC 2006 Vol.4 Ch.5 Table 5.11	1.30 kg CH₄/ha/day	36.4 kgCO₂e/ha/day	3.C.7
Intermittently Flooded Rice	IPCC 2006 Vol.4 Ch.5 Table 5.11	0.60 kg CH₄/ha/day	16.8 kgCO₂e/ha/day	3.C.7
MSW Managed Landfill	IPCC 2006 Vol.5 Ch.3 · 2019 Refinement	6.0 kg CH₄/tonne waste	168 kgCO₂e/t	5.A
Food Waste Landfill	IPCC 2006 Vol.5 / 2019 Refinement	8.0 kg CH₄/tonne	224 kgCO₂e/t	5.A
Industrial WW (anaerobic)	IPCC 2006 Vol.5 Ch.6 Table 6.3	0.025 kg CH₄/kg COD	700 kgCO₂e/t COD	5.D.2
Food Ind. WW	IPCC 2019 Refinement Waste Ch.	0.028 kg CH₄/kg COD	784 kgCO₂e/t COD	5.D.2
Domestic Sewage	IPCC 2006 Vol.5 Table 6.2 · Tier 1	11.6 kg CH₄/person-eq/yr	325 kgCO₂e/person/yr	5.D.1
Sludge Digestion	IPCC 2006 Vol.5 / IPCC 2019	0.26 m³ CH₄/kg VS	~5.2 kgCO₂e/kg VS	5.D.1

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Key Standards & Frameworks Reference

Standard / Framework	Scope Covered	GWP₁₀₀ (CH₄)	Key Use
IPCC AR5 (2013)	All sectors	28 (fossil) / 34 (biogenic)	UNFCCC default; mandated for NDCs
IPCC AR6 (2021)	All sectors	27.9 (fossil) / 29.8 (biogenic)	Latest science; voluntary enhanced reporting
IPCC AR5 GWP₂₀	All sectors	84 (fossil)	Near-term climate policy analysis
IPCC 2006 GL (Vols 1–5)	Energy, IPPU, AFOLU, Waste	28	National inventory methodology base
IPCC 2019 Refinement	Energy, AFOLU, Waste updates	28	Updated coal mine, livestock, waste EFs
GHG Protocol Scope 1	Direct emissions	28 (AR5)	Corporate GHG inventory baseline
ISO 14064-1:2018	Organisation level	28	Third-party verification standard
EPA 40 CFR Part 98	US large facilities ≥25,000 tCO₂e	28	Mandatory US GHG reporting (GHGRP)
EU ETS MRV (MRR 2018/2066)	EU regulated industry	28	EU Emissions Trading System monitoring
OGMP 2.0 (2020)	Oil & gas upstream	28/84	UN voluntary O&G methane reporting
API Compendium (2022)	Upstream oil & gas USA	28	US oil & gas fugitive EF library
Global Methane Pledge (COP26)	All sectors	—	30% CH₄ reduction by 2030 vs 2020
UNFCCC Paris NDC Framework	National inventories	AR5/AR6	Country-level emission pledges
SEBI / BRSR (India)	Indian listed companies	28	Business Responsibility & Sustainability Report

CH₄ Emissions Ledger

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Total CH₄ Emissions

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GWP₁₀₀ = 28 · IPCC AR5

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/tonne produced

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Energy & Combustion

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Oil & Gas Fugitives

0.000 t

Coal & Minerals

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Industrial Process

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Agriculture

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Waste & Wastewater

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⛽ Stationary Combustion

0.0000%

💨 Gas Fugitives

0.0000%

🛢️ Oil & Gas Upstream

0.0000%

⛏️ Coal Mining

0.0000%

🔩 Metals & Process

0.0000%

🧪 Chemical Mfg

0.0000%

🐄 Livestock

0.0000%

🌾 Rice Cultivation

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🗑️ Landfill

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💧 Wastewater

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🌍 Global Methane Pledge — COP26 (2030 Target: −30%)

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