Brushy Creek Water Hardness & Quality Report (2026)
Water Hardness
21.1 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
1065.4 mg/L
Est. Daily Cost
$0.96
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Brushy Creek, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Brushy Creek | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Brushy Creek compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Brushy Creek, Texas | 361.5 mg/L | 10.7 ppt | 🔴 Very Hard | mixed |
| Round Rock, Texas | 101 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
| Jollyville, Texas | 180 mg/L | 6.9 ppt | 🔴 Very Hard | mixed |
| Cedar Park, Texas | 414 mg/L | 11.8 ppt | 🔴 Very Hard | mixed |
| Leander, Texas | 419.5 mg/L | 11.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Brushy Creek compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Brushy Creek | 361.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Brushy Creek's Water Unique?
Local geology and source profile
Brushy Creek, Texas, in Williamson County — a rapidly growing suburban community in the Austin metropolitan area's northeast corridor between Round Rock and Cedar Park, named for Brushy Creek (a tributary of the Little River), one of Texas's fastest-expanding bedroom communities serving the central Texas technology industry workforce — receives its municipal water from the Brushy Creek Municipal Utility District (MUD) or the Williamson County & Cities Health District water supply network, drawing from a combination of the Edwards Aquifer (artesian or semi-artesian wells), Lake Georgetown (North Fork San Gabriel River), and possibly supplemental supplies from the Lower Colorado River Authority (LCRA).
The extremely hard 361.5 mg/L hardness and very high TDS of 1065.4 mg/L are among the most challenging in this entire dataset and reflect the Williamson County supply's deep Cretaceous and Cambrian geological character. The Williamson County water supply accesses deep Cretaceous Edwards Limestone artesian zones that are more confined and mineral-concentrated than the shallow, rapidly-circulating Edwards Aquifer zones of Bexar County (Converse TX 126.5 mg/L). In more confined Williamson County artesian zones, extended water residence times allow greater dissolution of calcium, magnesium, and sulfate from the carbonate formations. The Cambrian–Ordovician Ellenburger Dolomite — a deep, prolific Central Texas formation beneath the Edwards — can contribute extremely hard, high-TDS artesian water when accessed through deeper production wells. The blended supply of deep artesian and Lake Georgetown (Cretaceous limestone tributary) produces this extremely hard, high-TDS finished water.
At 361.5 mg/L with TDS 1065 mg/L, Brushy Creek residents face some of the most demanding water quality challenges in Texas. Scale forms within days on all appliances and fixtures — water heaters fail prematurely without softening, dishwashers require immediate softener treatment, and faucets and shower heads encrust within weeks. A whole-house water softener is essential, and a reverse osmosis (RO) system for drinking and cooking water is strongly recommended given the extremely high TDS. The PFAS level of 10.7 ppt additionally warrants a certified NSF-58 reverse osmosis filter for all drinking and cooking water in this Williamson County community.
Geology & Source: Brushy Creek in Williamson County draws from Brushy Creek MUD treating the deep Edwards Aquifer artesian and North Fork San Gabriel River (Lake Georgetown) — the supply accesses deep Cretaceous Edwards limestone artesian zones and the Cambrian–Ordovician Ellenburger Dolomite — highly mineralized deep artesian carbonate and dolomite produces extremely hard water at 361.5 mg/L with very high TDS 1065 mg/L in this Austin suburb.