The record for landfill methane
worth checking again.

Plume Ledger lines up EPA-reported landfill methane with independent aircraft measurements from 2016–2022, keeps uncertainty visible, and turns the comparison into a follow-up queue.

Open the follow-up queue Top 50 places to fly next Read the methods

Try Moody, AL, Houston, or Star Ridge.

From scattered reports to a follow-up queue.

Reported Derived

31k

15k

GHGRP2022 workbook

Aircraftkg/h CH4

LMOPfacility row

ACSblock group

TIGERboundary

ScienceHubtime average

GHGRPSubpart HH

LMOPgas collection

Aircraftoverpass day

IPCCAR4 ÷ 25

ACSpeople nearby

TIGERin-state only

What should we check?

Richland Creek Road Landfill

GA · Strong gap

Reported

5,053 t

Derived observed

30,974 t

Ratio

6.1×

Gap

25,921 t

Flag

Strong

31k

Reported · derived

Richland Creek Road LandfillGA

Reported

5,053 t

Derived

30,974 t

Star Ridge LandfillAL

Reported

1,205 t

Derived

14,975 t

Surveyed

113

Strong gaps

Comparable pairs

States

Richland Creek Road Landfill30,974 t

Star Ridge Landfill14,975 t

GHGRPReported methane in the year the aircraft flew

RATEPublished time-averaged rate, not a daily mean

DRAW10,000 draws. No invented report uncertainty

DAYSThree or more overpass days for a strong flag

QUEUEA follow-up order. Not a finding of a violation

What do these numbers mean for my family near Star Ridge? Draft a polite email.

Ask · Plume Ledger

I'll separate the aircraft reading from the EPA report, and say what a strong gap does — and does not — mean for neighbors.

Thought for 5s

I'll keep health risk out of it: nearby population is proximity, not exposure. Then I'll draft a short, neutral ask your state agency can answer.

Thought for 3s

Subject line ready: request a re-measurement since the 2022 overpasses, and ask whether cover and gas wells were checked. No accusation in the letter.

Loading the landfill dataset…

The record for landfill methane worth checking again.

The record for landfill methane
worth checking again.