Best Practices for Landfill Gas Monitoring

If your site runs a gas collection system, most regulatory regimes don’t just expect you to monitor it — they specify exactly how often and what to check. A common baseline across regulated landfills: monthly wellhead monitoring for temperature, oxygen (or nitrogen) and vacuum pressure at every interior wellhead, plus quarterly surface surveys to confirm methane stays under roughly 500 ppm above background. Exact numbers vary by jurisdiction, but that’s a useful floor to benchmark against — the difference between a site that’s technically compliant and one that’s actually optimizing methane capture usually comes down to how disciplined the monitoring program is day to day.

Here’s what that discipline looks like in practice.

1. Make monitoring consistent, not just frequent

Consistency matters as much as frequency. If one technician reads a well differently than another — different meter, different technique, different time of day — your trend data is comparing apples to oranges before you’ve even started analyzing it. Standardized procedures for reading extraction wells, headers, condensate systems, flares and engines are what make month-over-month comparisons actually mean something.

2. Get data collection off paper

Paper forms mean data sits in a truck or a drawer until someone gets around to typing it in — and by then, a problem that started three days ago has had three more days to get worse. Digital collection tools close that gap: readings are visible in real time, traceable to who took them and when, and don’t depend on someone’s handwriting being legible six months later.

3. Track what the regulation already requires you to track

Methane gets the attention, but wellhead temperature, oxygen intrusion and vacuum pressure are just as important to track monthly — they’re leading indicators of problems methane readings alone won’t show. A wellhead running hot (many regulators set the threshold around 55°C) is worth flagging on its own, and once temperatures climb well beyond that it’s often a sign of subsurface fire risk that needs immediate attention, not just a number to log. Oxygen intrusion usually means a well is pulling air instead of gas — a sign of over-extraction or a leak, not just a number to log and forget.

4. Put readings on a map, not just in a spreadsheet

A column of well numbers and readings tells you what’s happening at each point. A map tells you what’s happening across the site — which zone is underperforming, where an emission hotspot is forming, whether a corrective action actually worked or just moved the problem somewhere else. Landfill gas systems are inherently spatial; the moment monitoring data lives on the same map as the wells themselves, patterns that were invisible in a spreadsheet get obvious.

5. Look for trends, not just today’s snapshot

One reading tells you almost nothing on its own. A well that’s read “fine” every month for a year but has been quietly declining the whole time is a problem a single snapshot will never catch — you need last month, and the month before, and the season before that. Seasonal patterns, infrastructure that’s starting to fail, and settlement working its way through a cell all show up as trends long before they show up as a single bad reading.

6. Let monitoring actually trigger maintenance

A well blockage, a damaged valve, a pipe leak — monitoring data usually flags these before anyone notices in the field, but only if someone’s watching and the data actually reaches whoever handles maintenance. Where monitoring and maintenance live in separate systems, or separate people’s heads, that connection is the first thing to break down.

The bottom line

None of this replaces your regulatory minimum, whatever that looks like in your jurisdiction — monthly wellhead checks and quarterly surface surveys are a reasonable floor almost anywhere. What separates a well-run gas program from one that’s just checking boxes is whether that data is consistent, digitized, mapped, tracked over time, and actually connected to the people fixing things. That’s what eLandfill’s gas module is built to do.

Request a demo to see it on a real site.