Canyon Lake Water Hardness & Quality Report (2026)
Water Hardness
16.1 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
735.2 mg/L
Est. Daily Cost
$0.73
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 Canyon Lake, your appliances are currently losing 37% efficiency due to mineral buildup.
| Appliance | In Canyon Lake | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.4 yrs | 12 yrs | -72% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Canyon Lake compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Canyon Lake, Texas | 275.5 mg/L | 8.9 ppt | 🔴 Very Hard | mixed |
| New Braunfels, Texas | 147.5 mg/L | 6.2 ppt | 🟠 Hard | mixed |
| Timberwood Park, Texas | 85.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | mixed |
| Cibolo, Texas | 273 mg/L | 8.8 ppt | 🔴 Very Hard | mixed |
| Live Oak, Texas | 243 mg/L | 8.2 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Canyon Lake compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Canyon Lake | 275.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Canyon Lake home
Shop water softeners on Amazon.com →
What Makes Canyon Lake's Water Unique?
Local geology and source profile
Canyon Lake, Texas, in Comal County — an unincorporated Comal County community on and around Canyon Lake (a major Corps of Engineers reservoir on the Guadalupe River) in the Texas Hill Country, a rapidly growing San Antonio exurban and recreational residential community — receives its municipal water from the Guadalupe-Blanco River Authority (GBRA) or the Canyon Lake Water Service Company, which draws from Canyon Lake (the Guadalupe River reservoir impounded by Canyon Dam). Canyon Lake is both the community's namesake and its primary water supply.
The very hard 275.5 mg/L hardness and elevated TDS of 735.2 mg/L reflect the Guadalupe River watershed's exceptional Texas Hill Country karst carbonate geology. The Guadalupe River above Canyon Lake originates in the Edwards Plateau — a dissected Cretaceous limestone plateau that is among the most carbonate-rich landscapes in North America. The Edwards Limestone (Cretaceous Glen Rose and Edwards Group) and the Buda Limestone form the dominant bedrock, with extensive karst spring systems (the iconic Jacob's Well, Jacobs Creek Springs, and Guadalupe River springs) providing continuous hard carbonate-rich baseflow. The Edwards Plateau's Cretaceous limestone dissolution produces extremely dissolved calcium and bicarbonate-rich river water throughout the Guadalupe above Canyon Dam.
At 275.5 mg/L with TDS 735 mg/L, Canyon Lake residents face very hard water typical of the Texas Hill Country. Scale builds rapidly in appliances and fixtures within weeks, dishwashers require rinse aid or softener salt, and bathroom surfaces develop heavy calcium deposits. A whole-house water softener is strongly recommended. The PFAS level of 8.9 ppt warrants a certified drinking water filter — the Guadalupe River corridor military bases (Camp Bullis, Randolph AFB downstream), the San Antonio metro military-industrial complex upstream, and the Comal County Hill Country's limited but measurable PFAS contributions all factor into Canyon Lake's reading.
Geology & Source: Canyon Lake in Comal County draws from the Guadalupe-Blanco River Authority (GBRA) treating Canyon Lake reservoir — the Guadalupe River above Canyon Lake drains the Edwards Plateau (Cretaceous Edwards Limestone and Buda Limestone karst) — Edwards Plateau karst carbonate spring and river drainage produces very hard water at 275.5 mg/L with elevated TDS 735 mg/L in this Comal County Texas Hill Country community.