Work out what it is
How do you find out why a water bill jumped?
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Short answer
Shut every fixture in the house, then watch the low flow dial on your water meter for ten minutes. If it moves, you're losing water. Then isolate: close the main and see if it stops, which separates a house leak from an irrigation leak.
The most common and the most overlooked. A flapper that doesn't seat lets water trickle from tank to bowl continuously, silently, and it can waste more water than everything else in the house combined.
Points to this if: Meter moves, stops when you shut off the toilet supply valve
A cracked lateral, a broken sprinkler head or a stuck valve on a timed system. It runs at night, waters ground that's already wet, and nothing indoors looks wrong at all.
Points to this if: Meter moves with the house main closed, or one area of the yard is always soggy
A supply line under the foundation leaking into the soil. Alongside the bill you usually get a warm floor patch, running water sounds with everything off, or damp flooring in one spot.
Points to this if: Meter moves, nothing visible, sometimes a warm spot on the floor
High incoming pressure forces more water through every partly worn valve and seal in the house, and it pushes water out through the heater relief valve. The bill creeps rather than jumps.
Points to this if: Hose bib gauge reads above 80 psi
Local context
Two local patterns account for most of these calls. Irrigation on timers is the first, because outdoor watering is year round here and a broken lateral simply waters the same patch every night without anyone noticing for a month.
The second is the slab. Post-war Santa Ana tracts and the 1960s Fountain Valley housing sit on slab-on-grade foundations with supply lines in or under the concrete. A leak there never shows as a puddle. It shows as a bill, a warm floor, and eventually a musty carpet.
There is a useful local detail on the water side too. Santa Ana draws most of its supply from the Orange County groundwater basin, and the Orange County Water District runs the Groundwater Replenishment System over in Fountain Valley to keep that basin topped up. None of that changes your bill, but it's worth knowing that the pricing signals here are real rather than arbitrary.
Still not covered? Say what is happening and we will work out who needs to come.
Call (714) 208-7149Far more than people expect, because it runs every hour of every day. A slow flapper leak is one of the few faults that can visibly change a bill on its own, and the part costs a few dollars.
Yes. Lift the lid on the box near the street, brush off the dirt and find the small sweep hand or triangular low flow indicator. It moves when water is passing, however slowly. It's the single most useful diagnostic tool you own and it's already installed.
Some water providers offer a one time leak adjustment when you can show the leak was hidden and that you repaired it. Ask your provider directly and keep the plumber invoice, because the repair receipt is normally what they need.
That's exactly the point where leak detection earns its fee. Acoustic equipment and line by line pressure testing find leaks that are under concrete or buried in a yard, and an hour of that's cheaper than opening the wrong floor.
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