The EPA Just Told Factory Farms: Nobody's Counting Anymore

Livestock barn and an air-monitoring instrument in a rural landscape; an illustrative image, not a photograph of a specific farm or EPA study.

By Dakota Jones
Desk: Political & Government, Public Policy & Regulatory
Published: November 4, 2026

The EPA has stopped trying to finish a national emissions-estimation system for livestock farms. The agency says the data are too old and too limited to support reliable methods. Fair enough: bad science is not improved by putting it in a nicer spreadsheet.

But when a two-decade effort to work out how to estimate air pollution ends without a replacement, a practical question follows: who is counting now?

The short answer is that EPA has ended one specific project, not all measurement, all environmental rules, or every legal duty for farms. The longer answer matters to people living near large livestock operations, farm operators, and anyone who expects environmental protections to come with, well, usable information.

What happened: EPA shelves the old emissions playbook

On October 30, EPA announced it would not finalize emissions-estimating methodologies under the 2005 Animal Feeding Operations Consent Agreement and Final Order, usually called the Air Compliance Agreement. The agency’s enforcement office will work to notify the participating operations and terminate the agreement’s obligations.

The agreement was a voluntary deal. Participating farms supplied access and data for the National Air Emissions Monitoring Study, or NAEMS. EPA was supposed to use that work to develop ways to estimate emissions and help determine whether facilities needed to take action under applicable laws.

The original study monitored barns and lagoons at 25 animal feeding operations in 10 states. It measured ammonia, hydrogen sulfide, particulate matter and volatile organic compounds between 2005 and 2007. Approximately 2,600 operations, representing nearly 14,000 facilities, joined the agreement.

That is a lot of facilities resting on a study that is old enough to have its own midlife crisis.

EPA’s stated reason for stopping: the data do not reflect current farm conditions. Barn designs, herd sizes and manure-management practices have changed. The agency’s October 30 memorandum also describes longstanding concerns about the study’s limited sample and whether it could support reliable estimates across different regions and types of operations.

A monitoring instrument beside a livestock-barn ventilation fan; illustrative editorial image, not documentation of NAEMS.

EPA had released draft methods for public comment in November 2024. The comment period closed in August 2025. But more tinkering with the existing models could not fix what EPA calls the underlying limitations of the data. The agency concluded it would need information, validation and model development beyond the original study to produce methods it could stand behind.

There is a detail worth keeping straight: EPA says it will work to notify facilities and then terminate the agreement. The announcement describes a process, not a claim that every obligation disappeared on October 30 at the stroke of a press release.

The agency also says this decision does not change its implementation of the Clean Air Act. That caveat is important. It is also not the same thing as saying the law will be easy to apply.

Why it matters: estimating is not the same as regulating

An emissions-estimating methodology is a tool for calculating how much of a pollutant a facility releases when direct, continuous measurement is not available. Think of it as a consistent measuring stick. Without one, comparing facilities, or deciding whether a facility crosses a regulatory threshold, gets harder.

The EPA agreement was intended to help develop that measuring stick. Its end leaves no finalized national method from the NAEMS project to replace it.

That does not mean air pollution has vanished. It means EPA is no longer completing this particular framework for estimating it. As Inside Climate News reported, advocates say the absence of an EPA-issued method does not itself erase Clean Air Act obligations that may apply when a facility exceeds relevant thresholds. The outlet also notes that other research and state tools may be available. No single national EPA method is not the same as no possible way to estimate emissions.

And no: this 2005 agreement was not a methane-monitoring program. The pollutants in the NAEMS work included ammonia, hydrogen sulfide, particulate matter and volatile organic compounds. That is already a complicated list. There is no need to add a different regulatory fight to it for dramatic effect.

A separate reporting exemption still applies

Here is where the headline’s “nobody’s counting” needs a footnote, and possibly a second footnote.

EPA says air emissions from animal waste at farms are exempt from reporting under CERCLA and EPCRA. Those laws include emergency-notification requirements for certain hazardous-substance releases. The exemption is specific: it concerns air emissions from animal waste. It does not cover every kind of release. For example, EPA says a release into water, or an air release from an anhydrous-ammonia storage tank, may still require reporting if it meets the applicable criteria.

So the October decision did not create that reporting exemption. The exemption has its own history in legislation and rulemaking. It also does not mean every environmental rule has gone away. It means one particular kind of reporting, animal-waste air emissions under these two laws, is already exempt, while EPA has now stopped pursuing emissions-estimation methods through the old agreement.

Air sampler, tubing and a blank clipboard suggest the process of measurement; illustrative image with no EPA data shown.

Meanwhile, the Clean Air Act question remains. EPA says its decision does not change how it implements that law. But Inside Climate News reports that the end of the agreement removes its protections for participating facilities as the agreement is concluded, while emissions-permit duties may still apply where thresholds are exceeded. The legal obligation and the practical ability to estimate emissions are not the same thing. That gap is the story.

This is a community-information problem, too

Air monitoring is technical. The consequences are local. When people live near a large livestock operation, clear information can help communities understand what is known, what is measured and what remains uncertain.

That is not an argument that every facility emits the same amount, or that one old study could answer every local question. It is an argument for credible evidence, and for being candid when the evidence is not good enough.

EPA says it wants to work with USDA, universities and producers on practical, science-based ways to understand and reduce farm air emissions. That is a reasonable goal. The public will need to see what comes next: new data, a new methodology, a timetable, and a way for nearby communities to understand the results. “We’ll keep working on it” is a start, not a measurement plan.

The stakes are visible from Iowa’s hog country to livestock regions in Nebraska and California, where facilities operate under different state and local conditions. One national formula might not fit every barn. But if the answer is no national formula, the alternative cannot be a shrug and an old dataset.

For more regulatory coverage, visit LD3’s Political & Government desk.

Verdict: the counting project is over; the rules are not

The EPA did not say factory-farm emissions no longer exist. It did not repeal the Clean Air Act. It did not announce that all reporting requirements for all releases from farms have disappeared.

It did say that the 2005–2007 NAEMS data are too old and limited to support reliable national methods, and that it will not finalize the estimation methodologies planned under the agreement.

That is a defensible scientific judgment. It is also a policy choice with consequences. The old system is out. A replacement is not in hand. And emergency reporting exemptions for animal-waste air emissions remain in place under separate rules.

Punchy verdict: the EPA has stopped counting on this particular federal measuring stick. Until a credible replacement appears, the public should not confuse “the old method was inadequate” with “the problem has been measured and settled.” Numbers matter. So does saying plainly when you do not have them.

Sources