How a Backyard Lot and a Farm Pond Became Federal Waters, Then Didn't

A puddle is a "navigable water" when a federal agency says it is, and not a moment before. For about fifty years the government's answer to that question changed with the weather, or at least with the administration, and the people who paid for the confusion were not the lawyers. They were a couple in Idaho with a half-acre lot, farmers with a low spot that held water after a rain, and ranchers who could not tell, when they bought a pasture, whether a federal permit came with it.

The phrase at the center of the fight is "waters of the United States," and it sounds like something out of a patriotic hymn. It is actually five words in a statute that decide whether you need a permit to fill a low spot, whether you can be fined by the day for guessing wrong, and whether you get to see a judge before the fines start. Let me give you the timeline, date by date, and explain why each date mattered.

A word on what is and is not at stake

Before we start, a correction that matters for farmers. The Clean Water Act exempts a list of ordinary farming activities from the federal permit for dredged or filled material, including plowing, seeding, cultivating, and the construction or maintenance of farm or stock ponds and irrigation ditches. Those exemptions came into the statute in 1977, and they come with conditions, including a provision that can pull an activity back under the permit requirement if it changes the use of the land in a way that impairs the flow or reduces the reach of the waters. So the question was never simply "can a farmer plow?" The real questions were narrower and nastier: Is this low spot, ditch or wet field a "water of the United States" at all? And if it is, what happens when you change it?

If the answer is yes, a permit from the Army Corps of Engineers may be required for fill, and a violation can bring civil penalties that accumulate day after day. If the answer is no, the matter belongs to the state and the landowner. Everything in this timeline is a fight over that line.

The timeline

1972: Congress writes five words and leaves the rest to the agencies

In October 1972 Congress passed the Federal Water Pollution Control Act Amendments, which we now call the Clean Water Act. President Nixon vetoed the bill, and Congress overrode the veto. The Act prohibits discharging a pollutant into "navigable waters" without a permit, and it defines "navigable waters" as "the waters of the United States, including the territorial seas." Section 404 created the permit system for dredged or fill material, run by the Army Corps of Engineers.

Why it mattered: Congress had used the word "navigable" and then defined it with a phrase that did not mention navigation. That ambiguity was a loaded gun left on a table. The agencies picked it up.

1977: The farm exemptions arrive

Amendments in 1977 added the list of farming and ranching exemptions I described above, a direct response to farmers' complaints that the Corps was reaching into ordinary agricultural work.

Why it mattered: It was Congress's own admission that the first draft of the program reached too far. The exemptions still left the central question of which waters unanswered.

1985: The Court accepts wetlands next door to navigable water

In United States v. Riverside Bayview Homes the Supreme Court unanimously upheld the Corps' authority over wetlands that were adjacent to, and mixed in with, navigable waters. The Court said it was reasonable for the agency to treat such wetlands as part of the water.

Why it mattered: It set the high-water mark of the "adjacent wetlands" theory, and the agencies spent the next twenty years stretching it.

2001: The Court says the migratory bird rule goes too far

In Solid Waste Agency of Northern Cook County v. Army Corps of Engineers, known as SWANCC, the Court rejected the Corps' attempt to assert jurisdiction over isolated ponds based on their use by migratory birds. The vote was five to four. The majority said that "navigable" had to mean something.

Why it mattered: For the first time the Supreme Court told the agencies that their reading had a limit.

2006: Rapanos, and a fractured Court

In Rapanos v. United States, decided June 19, 2006, the Court split four, one, four. Four justices, led by Justice Scalia, said the Act covers only "relatively permanent, standing or continuously flowing bodies of water" and wetlands with a continuous surface connection to them. Justice Kennedy, alone, wrote that a wetland is covered if it has a "significant nexus" to navigable waters. Four dissenters would have upheld the agencies' broad view. No single test had five votes.

Why it mattered: A landowner now had two tests, and the government could win under either. In practice, the "significant nexus" test became the working rule, and it required case-by-case analysis. A farmer had to hire a consultant to find out whether a ditch was federal.

2012: Sackett and the right to see a judge

Chantell and Michael Sackett of Idaho had bought a lot near Priest Lake and started to fill it to build a home. In 2007 the EPA issued a compliance order saying the lot contained wetlands, ordering them to restore the site, and warning of daily penalties if they did not. The Sacketts were told they could not go to court to challenge the order. They could wait until the EPA sued them. In Sackett v. EPA, decided March 21, 2012, the Supreme Court ruled unanimously, in an opinion by Justice Scalia, that landowners may challenge such a compliance order in court right away under the Administrative Procedure Act. The opinion noted that the penalties could run to $75,000 a day when you stacked the violation on the violation of the order.

Why it mattered: It was the first major victory for the little guy in this area. The agency could no longer hand down a verdict and dare you to disobey. That is basic due process, and it took the Supreme Court to say so.

2015: The Clean Water Rule

In June 2015 the Obama administration's EPA and Army Corps published the Clean Water Rule, which tried to define "waters of the United States" using categories such as tributaries and neighboring waters, and distances from them. Critics argued that the definition swept in ditches, seasonal streams and low spots, and that it stretched the "significant nexus" test far past what Justice Kennedy had written. Supporters said it merely clarified what the law already was. Litigation followed in many courts, and in October 2015 the Sixth Circuit stayed the rule nationwide.

Why it mattered: The rule never took effect across the country in the form its authors intended, and it kept farmers in limbo.

2020: The Navigable Waters Protection Rule

The Trump administration repealed the 2015 rule and replaced it in 2020 with the Navigable Waters Protection Rule, effective June 2020. It drew the line closer to the Scalia view: traditional navigable waters, tributaries that flow in a typical year, certain wetlands and impoundments, and it excluded ephemeral features, meaning those that flow only in response to rainfall.

Why it mattered: It gave farmers the clearest map they had had in decades. A ditch that was dry most of the year was generally out. Critics said it left too many wetlands and streams unprotected.

2021: The courts vacate it

In August 2021 a federal district court in Arizona vacated the 2020 rule. The agencies, now under the Biden administration, announced they would stop applying it and return to the pre-2015 regulatory approach while writing a new rule.

Why it mattered: Think about that for a second. A rule that took years to write was gone in an afternoon, and the farmer was back to the case-by-case system under Rapanos. This is the pattern that drives people crazy: the line moves every time the White House changes hands.

2023: Sackett returns, and the Court goes back to the text

The Sacketts' fight had not ended in 2012. It went on, and in 2023 their case returned to the Supreme Court. In Sackett v. EPA, decided May 25, 2023, the Court unanimously agreed that the Sacketts' lot was not covered, though the justices split on the reasoning. Justice Alito's opinion for five justices held that the Clean Water Act's reach extends to only those wetlands that are "as a practical matter indistinguishable from waters of the United States," and that such a wetland must have a continuous surface connection to a body of water that is itself a "water of the United States." The Court rejected the "significant nexus" test. Four justices concurred in the judgment but would have used a different test.

The agencies then amended the Biden administration's January 2023 rule to conform to the Court's decision, with a final rule in September 2023.

Why it mattered: After sixteen years of litigation counted from the 2007 compliance order, the highest court in the land had said that a federal agency's power depends on what Congress actually wrote and not on what a rulemaker thought would be convenient.

The best case for the other side

I promised to be fair. Here is the strongest version of the opposite argument.

The environmental case says that water is connected. A wetland that does not touch a river on the surface may still feed it underground, filter pollution that would otherwise reach it, and absorb floodwater that would otherwise flood the town downstream. If federal law stops at the edge of the visible stream, then upstream landowners can ruin the water for everyone below. A narrow definition, the argument goes, leaves a gap that only the federal government can fill, because pollution does not stop at a state line.

That is a real concern, and nothing in the 2023 decision says Americans must accept dirty water. But look at what the argument proves. It proves that somebody should be responsible for upstream pollution. It does not prove that the federal government, acting without a clear statute, should be the one to decide whether your farm pond is a lake. The Constitution gives Congress the legislative power. If Congress wants a broader reach, it has a procedure for that: it can pass a law that says so. The states also have their own water-quality laws, and many protect wetlands more aggressively than federal law. A Western or Midwestern state that wants to regulate isolated wetlands is free to do it. The Court said only that the federal statute as written does not.

The conservative case in four points

Here is why I believe the Court got it right, and why the previous decades were a mistake.

1. Fair notice is a basic part of the rule of law. A citizen should be able to read a statute and know what is forbidden. A test that required a consultant, a wetland delineation and a legal opinion to learn whether you could fill a corner of your own field fails that standard.
2. Penalties should follow law, not guesses. Daily fines in the tens of thousands of dollars, imposed for violating a standard that the agency itself could not state clearly, are not compatible with due process.
3. Congress, not an agency, should decide how far the federal power goes. A statute that uses the word "navigable" cannot sensibly be read to cover a ditch that is dry for ten months of the year. This is the same logic that runs through The Court Did Not Ban Clean Air. It Told EPA to Ask Congress First., where the Court said that a major question gets answered by Congress.
4. The states are not helpless. The federal government is not the only protector of clean water. State and local governments have their own powers, closer to the landowner and closer to the voters.

What it means for the small landowner

For a farmer or a homeowner, here is the practical meaning. Under the 2023 decision, a wetland is generally covered by the federal act only if it is hard to tell from the adjoining waters of the United States, and it has a continuous surface connection to them. A ditch, a seasonal low spot or an isolated pond generally is not. But that is a general rule, not a promise. Your state may regulate it. Your county may require a stormwater plan. A different federal law may apply to endangered species or to the discharge of pollutants from a feedlot. And if you are in doubt, the right move is to ask the Corps for a written determination before you move any dirt, which gives you something to rely on later.

If you want to understand how Washington decides that a thing is under its jurisdiction, A Farmer's Wheat Crop and the Long Fight Over the Commerce Clause tells the story of a farmer whose wheat never left his farm and still became a federal matter. And if you worry about what happens when regulation goes so far that it destroys the value of the land, The Takings Clause in Four Cases Every Landowner Should Know covers the Fifth Amendment. For the paperwork side of the same instinct, see NEPA Explained, the 1970 Law Where Paperwork Outlasts the Project.

The bottom line

• Five words in a 1972 statute drove fifty years of confusion. "Waters of the United States" was never defined with precision, and each administration filled the gap its own way.
• The Sacketts won twice, and landowners everywhere benefited. The 2012 ruling gave you the right to challenge an order in court, and the 2023 ruling tied federal power to the text of the law.
• Do not assume your low spot is exempt, or covered. Check your state's rules, ask the Corps for a written determination before you dig or fill, and keep the paper.
• If you want a broader federal reach, the answer is to ask Congress. That is how a representative government is supposed to work, and the voters can hold lawmakers to account for what they write.
• The line should stop moving with every election. A clear rule, whichever way the law goes, is worth more to a family farm than any slogan about clean water or property rights.