Why your water bill spiked (and how to find the leak)

Your water bill just doubled, and you have no idea why. You're not running sprinklers more, nobody's taking longer showers, and you haven't changed your routine. A hidden leak is the most common cause, and in Northern Virginia homes it's usually hiding in one of four places: a running toilet, an outdoor spigot, an irrigation line, or a pipe under the slab.

The good news is that finding it doesn't have to mean tearing your house apart. Here's what our technicians check, in the order we usually check it, and how we pinpoint a leak you can't see.

How we confirm there's a leak

The first thing we look at is the water meter. With every fixture and appliance in the house off, a meter that's still moving tells us water is leaving the system somewhere. We watch it long enough to catch leaks that come and go, like a toilet that refills every few minutes.

Once we know water is escaping, the job becomes finding where. That's when we work through the usual suspects.

The usual suspects in Northern Virginia homes

Running toilets

A toilet with a bad flapper can run without anyone noticing. The water level drops slowly, the fill valve kicks on for a few seconds, then stops. Repeat every few minutes, all day long. A single running toilet can waste thousands of gallons a year without making a sound.

The fix is often a quick flapper replacement. If the fill valve or other tank hardware is worn, the toilet repair is a bit more involved, but still straightforward.

Outdoor spigots

After a hard freeze, outdoor faucets can crack or develop loose connections. We see this every spring in older homes that still have standard, non-frost-free spigots. A steady drip from a hose bib is easy to ignore, but it runs all day.

Irrigation lines

Northern Virginia's clay soil shifts with the seasons. It expands when wet, contracts when dry, and can crack irrigation lines or pull fittings apart without warning. Tree roots make it worse by shifting and crushing shallow lines over time.

You might never see water pooling on the surface. The leak can feed into your landscaping or run off into the storm drain while the meter keeps turning.

Slab leaks

When a water line under a concrete slab develops a leak, you might notice warm spots on the floor (if it's a hot line), unexplained water damage, or the sound of running water when everything's off. Our post on the warning signs of a slab leak covers those symptoms in more detail. Slab leak repair depends on where the leak is and how we can reach it.

Which leaks are common in older NoVA homes

Northern Virginia's housing stock creates its own leak patterns. Homes built from the late 1970s into the early 1990s often have polybutylene supply lines, which grow brittle over time. Older homes with mature trees and big lawns are more likely to have irrigation and spigot trouble.

If the pipes themselves are the problem, a single repair may only buy time. In those homes, repiping with PEX is sometimes the lasting answer, and we'll tell you honestly when it is and when it isn't.

How we find a leak you can't see

When nothing is visibly dripping, it's time for professional leak detection. Our technicians use electronic listening devices and thermal imaging to pinpoint a leak without opening up walls, floors, or your yard any more than necessary. The leaks we track down are often underground or behind finished basement walls.

Waiting has a real cost beyond the bill. A slow slab leak can wash out soil and damage the slab over time. A hidden irrigation leak can kill established landscaping or create drainage problems.

We always start with diagnosis before proposing any work. Sometimes it's a toilet flapper. Sometimes it's a bigger repair. Either way, you'll know exactly what you're dealing with, and you'll get a written, upfront quote before any work begins.

If your bill jumped and nothing obvious is running, call (703) 508-3088. Our technicians bring decades of combined experience to tracking down hidden leaks in Northern Virginia homes, and we'll find yours.