Your Fort Collins Water Bill Just Jumped. Here's How to Tell If It's a Leak

Colorado water law and municipal billing practices generally hold homeowners responsible for water lost to a leak on their side of the meter, which is part of why catching a leak early matters financially as well as structurally. Some water providers offer a one-time billing adjustment for a documented leak, but that's a courtesy policy, not a guarantee, and it typically requires proof the leak was found and repaired.

Start with the meter, not the guesswork

Before assuming the worst, the simplest diagnostic test costs nothing: shut off every fixture in the house, note the reading on your water meter, wait 15 to 30 minutes without using any water, and check it again. If the number moved at all, water is flowing somewhere it shouldn't be, even if you can't see or hear it.

This test rules out the most common false alarm, a household simply using more water than usual because of a new appliance, a longer shower routine, or seasonal irrigation ramping up. If the meter test comes back clean but the bill is still high, the increase is probably real usage, not a leak, and worth a look at your actual habits before spending money on diagnostics.

The usual suspects behind an unexplained jump

A running toilet is the single most common cause of a surprise water bill increase, and it's often silent enough that nobody notices the sound. A worn flapper can waste a meaningful amount of water a day without ever overflowing the bowl, which is why we always check toilets first on a leak investigation.

After that, irrigation lines and outdoor spigots are common culprits, especially heading into spring when systems get reactivated for the first time in months. If the meter test is positive but nothing inside the house explains it, a leak in the underground service line or irrigation system is a real possibility worth checking before assuming it's a slab leak.

When it's genuinely hidden

If the meter confirms a leak and nothing obvious explains it, in-wall or under-slab leaks are next. This is where acoustic listening equipment earns its keep: a plumber can often narrow a hidden leak to within a few feet of its actual location before anything gets opened up, avoiding a guess-and-cut approach that damages more of the home than necessary.

A slab leak specifically tends to produce a warm spot on the floor if it's on the hot water line, along with the sound of running water audible even with every fixture off. That combination is worth taking seriously rather than waiting another billing cycle to see if it happens again.

What a normal diagnostic visit actually costs you

A leak detection visit is priced as a diagnostic service, separate from whatever repair follows, and we'll walk you through both numbers clearly rather than bundling them into a mystery total. Most hidden leaks are found within an hour or two using the right equipment, which is far less invasive and less expensive than opening walls or flooring based on a guess.

Why acoustic equipment works better than guessing from sound alone

Professional acoustic leak detection equipment amplifies the specific frequency range that pressurized water escaping from a pipe produces, filtering out ambient noise that would make manual listening unreliable. This is meaningfully more precise than a homeowner pressing an ear to a wall, since the equipment can pick up sound through several feet of soil, concrete, or framing that would otherwise mask it entirely.

Combined with ground microphones for underground lines and thermal imaging for lines carrying hot water, this equipment typically narrows a leak's location to within a small, specific area, which is what keeps the eventual repair from turning into unnecessary demolition.

One more thing worth knowing: a leak that's found but not yet repaired should still be shut off at the nearest valve if possible, even if that means going without water to that fixture for a day or two until repair can be scheduled. A confirmed leak left running while you wait for an appointment defeats much of the point of finding it early.