Methane Leaks
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Methane leaks in Iran

Satellites have detected 1,612 methane plumes at 201 sites in Iran since 2021, 575 of them in the 12 months to 1 Sep 2026.

575
Plumes, last 12 months
201
Sites
451,879 kg/h
Largest plume, last 12 months
0 / 143
Notified sites where the operator responded to UNEP
Satellite map of methane plume locations in Iran
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Biggest plumes in the last 12 months

Detected Site Emission rate Likely operator
30 Oct 2025Oil & gas IRN_S_185 451,879 kg/h National Iranian South Oil Company Plausible View
30 Oct 2025Oil & gas IRN_S_185 408,435 kg/h National Iranian South Oil Company Plausible View
30 Oct 2025Oil & gas IRN_S_185 385,374 kg/h National Iranian South Oil Company Plausible View
30 Oct 2025Oil & gas IRN_S_185 268,477 kg/h National Iranian South Oil Company Plausible View
17 Sep 2025Oil & gas — 259,000 kg/h National Iranian South Oil Company Plausible View
12 Jun 2026Oil & gas — 108,000 kg/h National Iranian South Oil Company Plausible View
5 Jan 2026Waste / landfill — 99,000 kg/h Not yet attributed View
30 Oct 2025Oil & gas IRN_S_185 97,000 kg/h National Iranian South Oil Company Plausible View
30 Dec 2025Oil & gas — 96,000 kg/h National Iranian Oil Company Plausible View
19 Oct 2025Oil & gas — 94,000 kg/h National Iranian South Oil Company Plausible View

Who operates these sites

National Iranian South Oil Company993 plumes
National Iranian Oil Company240 plumes

Plumes at sites we attribute to each company. Most attributions here rely on who operates a field or region, not on site-level confirmation; see each site for the evidence. What do confidence levels mean?

Plumes by sector, last 12 months

Oil & gas536
Waste / landfill31
Other6
Coal2

Sites that leak most often

Site Plumes, last 12 months Largest detected rate Last seen Likely operator
IRN_S_055Flare 3382 total 74,616 kg/h 5 Nov 2025 National Iranian South Oil Company Plausible
IRN_S_072Flare 2640 total 7,771 kg/h 31 May 2026 National Iranian South Oil Company Plausible
IRN_S_224Flare · Frequent 2323 total 7,600 kg/h 27 Jul 2026 National Iranian South Oil Company Plausible
IRN_S_102Flare 2257 total 16,874 kg/h 30 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_001Flare 18129 total 26,852 kg/h 9 Jul 2026 National Iranian South Oil Company Plausible
IRN_S_171O&G source (generic) 1720 total 42,000 kg/h 22 May 2026 National Iranian South Oil Company Plausible
IRN_S_013Transmission Compressor Station 1529 total 8,965 kg/h 29 Aug 2026 National Iranian South Oil Company Plausible
IRN_S_056Flare 1416 total 13,325 kg/h 20 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_152Transmission Pipelines 1414 total 19,955 kg/h 22 Jul 2026 National Iranian Oil Company Plausible
IRN_S_017O&G source (generic) 1227 total 6,634 kg/h 19 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_075Gas disposal facility 1148 total 37,109 kg/h 26 Apr 2026 National Iranian South Oil Company Plausible
IRN_S_009Flare 1021 total 15,700 kg/h 15 Jul 2026 National Iranian South Oil Company Plausible
IRN_S_052Landfill 831 total 8,511 kg/h 10 Aug 2026 Not yet attributed
IRN_S_004Gas disposal facility 824 total 10,431 kg/h 25 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_210Flare 88 total 32,822 kg/h 23 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_185Flare 88 total 451,879 kg/h 30 Oct 2025 National Iranian South Oil Company Plausible
IRN_S_065Gas disposal facility 755 total 42,791 kg/h 23 Sep 2025 National Iranian South Oil Company Plausible
IRN_S_139Flare 79 total 2,621 kg/h 2 Nov 2025 National Iranian South Oil Company Plausible
IRN_S_207Pipeline valve 77 total — 5 Jan 2026 National Iranian Oil Company Plausible
IRN_S_222Flare 66 total 10,775 kg/h 20 Jun 2026 National Iranian South Oil Company Plausible
IRN_S_107Flare 531 total 28,941 kg/h 6 Dec 2025 National Iranian South Oil Company Plausible
IRN_S_059Chemical plant component 511 total 4,716 kg/h 19 Jun 2026 National Iranian Oil Company Plausible
IRN_S_045Landfill · Frequent 415 total 3,513 kg/h 10 Aug 2026 Not yet attributed
IRN_S_151O&G facility (generic) 46 total 11,806 kg/h 11 Mar 2026 National Iranian South Oil Company Plausible
IRN_S_225Flare 44 total 10,975 kg/h 17 Jul 2026 National Iranian South Oil Company Plausible

All 201 sites in Iran →

Authorities you can notify

Of 143 sites UNEP notified in Iran, operators responded on 0.

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