Why Your Round Rock Water Bill Doubled This Month When Nothing Looks Wrong

Why a doubled bill with nothing visible almost always means underground or in-slab

A supply leak inside the house, under a sink or at a fixture connection, produces visible water in the cabinet, on the floor, or at the baseboard. Those leaks are found quickly because the evidence is impossible to ignore. The leaks that double a bill escape into a space with no floor: under the slab, into the subgrade, or into the crawl space of a pier-and-beam home.

A slab leak releases water into the void below the concrete, which absorbs it and eventually sends it out through the foundation perimeter or up through the slab surface as a damp spot. But many slab leaks run for a month before the surface sign appears, especially in Round Rock homes on the limestone west side where the subgrade drains fast. The bill doubles while the floor still feels normal. The only instrument that catches it early is the meter.

Isolating where the water is going

With the meter confirmed to be moving, the next step is determining which system is losing water. Turn off the main shutoff valve to the house and recheck the meter. If the meter stops, the breach is inside the house, on the supply side downstream of the shutoff. If it continues, the leak is in the service line between the meter and the shutoff, which means it is under the yard.

For an inside leak with nothing visible, the main candidates are the slab supply, the in-wall runs, and the irrigation system. Each is detectable with different instruments without opening any surface. For a leak under the yard, the service line from meter to house is the primary candidate, and tracer gas or acoustic correlation will find it before any digging starts.

Reading the statement and requesting an account review

If the doubling traces to a hidden leak, slab leak detection pinpoints it. Round Rock Utilities invoices break residential charges into three line items. The base service charge covers infrastructure maintenance regardless of consumption volume. The volumetric charge applies the tiered rate schedule to the registered usage during the billing cycle. The wastewater processing fee is assessed on a percentage of indoor consumption, because outdoor irrigation is assumed not to reach the sanitary sewer system. When a plumbing failure drives up indoor consumption, all three line items rise together: the base charge stays fixed, the volumetric charge escalates into higher tiers, and the sewer fee increases proportionally. Looking at which line items changed and by how much tells you something about the nature of the usage increase before a technician arrives.

If a licensed plumber documents a confirmed loss during the billing period and the repair is invoiced and dated, Round Rock Utilities accepts adjustment requests through its customer service department. The adjustment process requires the plumber's invoice, a description of what was found, and a written request referencing the billing period in question. Adjustments are not guaranteed and the criteria vary, but documented supply-side failures, particularly slab or underground service line breaches, are the category most likely to receive consideration. The request must be submitted within a defined window after the billing cycle closes; the customer service team can confirm the current deadline.

Requesting an adjustment and finding the loss source are separate actions. The documentation from the plumber's investigation is what the utility needs to begin the review, even if the repair is still pending.

A property owner who acts on a doubled bill promptly has the best chance of containing the financial impact. Call (512) 737-6168 to get the investigation documented from the day of the service call. Having the repair invoiced and dated puts the household in the correct account category under conservation district guidelines.