Uvalde Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.9
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
265 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · 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 Uvalde, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Uvalde | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Uvalde compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Uvalde, Texas | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Eagle Pass, Texas | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Kerrville, Texas | ≈ 180+ mg/L | 3.2 ppt | 🔴 Very Hard | reservoir |
| Del Rio, Texas | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | mixed |
| Leon Valley, Texas | ≈ 180+ mg/L | 3.1 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Uvalde compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Uvalde | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Uvalde's Water Unique?
Local geology and source profile
The City of Uvalde Water Utilities provides drinking water to residents in Uvalde County, Texas, primarily drawing from groundwater wells tapping the Edwards-Trinity Plateau Aquifer and associated formations like the Leona Formation. There are no major surface water treatment plants; supply relies on multiple municipal wells in the Uvalde area. The utility serves approximately 15,000 people across the city and surrounding unincorporated areas of Uvalde County, managed under the Uvalde County Underground Water Conservation District for conservation oversight.
The water's hardness is due to the Edwards Group limestones and Trinity Aquifer sands, dolomites, and volcanics, which dissolve to impart a hard character to the water through natural mineral leaching. This geology fosters moderately mineralised groundwater with elevated calcium and magnesium, shaped by the region's semi-arid climate and fault-controlled recharge zones that limit dilution. The Balcones Fault Zone watershed, where precipitation infiltrates karst landscapes overlying Cretaceous limestone aquifers, is the primary source of Uvalde's water.
Households may notice the effects of mineral buildup when doing laundry, as clothes can feel stiff without softeners, and soap lathering is less effective. To mitigate this, regular maintenance like annual descaling of fixtures and coffee makers is advised; a whole-house water softener is recommended for households to extend appliance life and improve cleaning results. For residents looking to reduce scale buildup, it's a good idea to check the Uvalde County Underground Water Conservation District's guidelines for water treatment and conservation. Typical pH ranges 7.2–7.8, compliant with EPA standards, and the utility meets lead and copper tap rules under LCR, with no exceedances reported.
Geology & Source: Edwards-Trinity Plateau Aquifer; Leona Formation - Cretaceous-age carbonate and limestone formations; karstic limestone layers contribute to hard water
Other Texas Water Reports
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Frequently Asked Questions
Is Uvalde's water safe to drink?
Do I need a water softener in Uvalde?
How does Uvalde compare to the USA average?
Data Sources & Methodology
Water quality data for Uvalde is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.