Lake Travis water and BCRUA
Cedar Park gets its drinking water from Lake Travis, the Highland Lakes reservoir on the Colorado River west of town. The city has long operated its own intake and treatment plant on the lake, and it is one of three partners, with Leander and Round Rock, in the Brushy Creek Regional Utility Authority. BCRUA started delivering water in 2012 from a regional treatment plant, and its partners have been building a deep-water intake designed to keep water flowing even when the lake drops in a long drought, after the floating barge intakes of the first phase proved vulnerable.
Lake Travis sits in the limestone of the Texas Hill Country, and the water it holds is rich in dissolved calcium. Treated city water in Cedar Park is hard, and it leaves a white, chalky crust on showerheads, inside kettles and at the bottom of water heaters. Zebra mussels, found in Lake Travis in recent years, are a concern for the intakes rather than for home plumbing, and the utilities manage them at the source.
Where heaters sit in Cedar Park homes
Cedar Park grew quickly from the 1980s on, and most homes are slab-on-grade houses in subdivisions like Buttercup Creek, Twin Creeks, Silverado and the neighborhoods along Cypress Creek Road and Whitestone Boulevard. In the older single-story homes the tank is usually in the garage. Two-story plans from the late 1990s and 2000s often moved it to the attic, and many 2010s homes came with a wall-mounted tankless heater in the garage or on an exterior wall.
Townhomes and newer apartments near the Cedar Park Town Center and the 183A toll road tend to use compact electric tanks in closets. Homes on larger lots toward the Lake Travis side of town, and in the hills around Twin Creeks, can have long hot water runs and recirculation loops that add complexity to any repair.
Hill Country weather and water heaters
Summers in Cedar Park are long and hot, and attic heaters take a beating from temperatures well over 120°F. Winters are usually mild, but when an Arctic front crosses Williamson County the city's water gets noticeably colder and an undersized tankless unit can start running lukewarm. The February 2021 storm brought days of freezing temperatures to the area, split attic and garage pipes across town and left a lot of homeowners shopping for a new heater in the same week.
Spring storms bring hail and occasional flash flooding along Brushy Creek and its tributaries. A garage that takes on water can submerge the burner and controls of a gas heater, which then needs inspection before it is relit.
The problems plumbers see most in Cedar Park
- Thick limestone scale on the bottom of gas tanks, causing popping and slow heating.
- Scaled tankless heat exchangers throwing flow and temperature error codes.
- Electric elements burning out under a crust of calcium in townhome tanks.
- Relief valves seeping after scale keeps them from seating properly.
- Attic heat wear on gas controls and drain pans in two-story homes.
- Softener-related corrosion when a salt softener is installed without updating the anode.
Typical water heater prices in Cedar Park
| Job | Typical Cedar Park range | Notes |
|---|---|---|
| Igniter, thermocouple or pilot repair | $160–$310 | |
| Electric element or thermostat | $190–$400 | Often both elements at once |
| Flush and descale | $140–$300 | Heavier scale costs more |
| Tankless descaling service | $175–$350 | Isolation valves help |
| 40–50 gallon gas tank replacement | $1,800–$3,300 | Permit and haul-away |
| Attic tank replacement | $2,100–$3,700 | |
| Tankless installation | $3,800–$6,800 | Gas line size matters |
Cedar Park prices track the broader Austin market, which runs higher than much of Texas. Descaling work is more common here than in many cities, and a tankless unit that has gone several years without service may need more than one cycle.
Permits and licensing in Cedar Park
The City of Cedar Park's building inspections office requires a permit for water heater replacements, with an inspection covering the gas line and shutoff, venting, the relief valve discharge, the drain pan and, in attics, the platform and access path. Parts of the area with Cedar Park addresses are actually in Leander, Austin or unincorporated Williamson and Travis counties, so the permit may come from a different office.
Every plumber working on a Cedar Park heater must hold a current Texas plumbing license, which the TSBPE issues and lets you look up online. When comparing quotes, ask each company to list its TSBPE license, the city permit, a new drain pan if needed and disposal of the old heater, so the prices are directly comparable.
Living with hard water in Cedar Park
Scale is the issue that shortens heater life here more than any other. On a gas tank, a layer of calcium at the bottom insulates the water from the burner, which wastes gas and makes the tank rumble and pop as trapped water flashes to steam. On an electric tank, the lower element can become encased in scale and fail. Draining and flushing a Cedar Park tank once a year, more often in homes with heavy use, keeps that layer thin. See our tank flushing service plus our write-up on why Lake Travis calcium crusts over Cedar Park tanks.
Tankless units need an annual descale with a pump and a mild acid solution circulated through the heat exchanger. If yours has no isolation valves, having them added makes every future service quicker. Plenty of Cedar Park households add a salt softener to fight Lake Travis calcium; it cuts scale sharply, yet the sodium-rich water eats a sacrificial rod sooner, so pull and inspect the rod on a tighter schedule once the softener is running.
Electric and gas service
Most of Cedar Park gets its electricity from Pedernales Electric Cooperative, a member-owned co-op rather than a retail choice provider, and the co-op has run incentive programs for efficient appliances at times. Atmos Energy supplies natural gas to most neighborhoods. Heat pump water heaters are a reasonable option in a Cedar Park garage, where they also cool the space a bit during summer, but they still need regular attention to scale like any tank.
Repair or replace in Cedar Park
Because hard water is harder on tanks, a Cedar Park heater often reaches the end of its life a little sooner than the same model in a soft-water city. Repairing a dead igniter or element pays off on younger units still in their first seven years or so. Once a tank passes ten, crusted with limestone, tinting the water orange or wet at the base, the smarter spend is usually replacing the whole unit.
Around Cedar Park
Leander, just north, shares the BCRUA water system but issues its own permits. Round Rock, the third BCRUA partner, runs a separate inspection office. Northwest Austin, including Anderson Mill and Avery Ranch, is on Austin Water, while Jonestown, Lago Vista and Liberty Hill each have their own utilities and building rules.
Water heater questions from Cedar Park
Why is Cedar Park water so hard?
Rain that feeds the Colorado and Pedernales rivers runs over and through limestone on its way into Lake Travis, dissolving calcium as it goes.
What is BCRUA?
The Brushy Creek Regional Utility Authority is a partnership of Cedar Park, Leander and Round Rock that treats Lake Travis water at a shared regional plant.
How frequently should Cedar Park owners descale a tankless unit?
Once a year is the minimum on unsoftened city water. Homes with heavy use may benefit from service every six to nine months.
Is a city permit part of a Cedar Park heater swap?
It is inside city limits. Cedar Park's building inspectors sign off on gas, venting, pan and relief line before the job closes.
Who supplies electricity in Cedar Park?
Most of the city is served by Pedernales Electric Cooperative. Atmos Energy provides natural gas.
My gas tank pops and crackles. What causes that?
Scale and sediment at the bottom trap water that boils against the burner. A flush, or replacement if the layer is very thick, usually resolves it.
Will a water softener help my water heater?
Yes, by reducing scale, but it can speed up anode wear. Have the anode checked more often once a softener is installed.