Alvin Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
8.1
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
466.4 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 Alvin, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Alvin | 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 Alvin compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Alvin, Texas | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Friendswood, Texas | ≈ 180+ mg/L | 59.7 ppt | 🔴 Very Hard | reservoir |
| Santa Fe, Texas | ≈ 120–179 mg/L | 791 ppt | 🟠 Hard | reservoir |
| Pearland, Texas | ≈ 180+ mg/L | 498.8 ppt | 🔴 Very Hard | reservoir |
| Webster, Texas | ≈ 180+ mg/L | 127.3 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Alvin compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Alvin | ≈ 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 Alvin's Water Unique?
Local geology and source profile
The City of Alvin in Brazoria County, Texas (PWS ID: TX0200001) operates the municipal drinking water system serving Alvin residents. Water is sourced from a blended supply drawing from the Brazos River and the Chicot Aquifer, as identified in EPA SDWIS records. The city publishes an annual Drinking Water Quality Report — with the 2023 report on record — documenting water quality parameters for the service area. Third-party water quality assessments characterize Alvin's supply as hard, consistent with the mineral-rich geology of the Brazoria County Gulf Coastal Plain region.
Alvin's blended supply is shaped by two distinct geological sources. The Brazos River drains Permian red beds and evaporites of Central Texas, contributing calcium and dissolved minerals from these ancient sedimentary formations. The Chicot Aquifer provides shallow Quaternary coastal sands interbedded with marine shell hash and calcareous clay layers — a geology that naturally releases calcium into groundwater. Dissolved calcium from both sources combines to produce the hard water character characteristic of the Brazoria County supply.
Hard water from Alvin's supply causes scale buildup in water heaters, pipes, dishwashers, washing machines, and other appliances, reducing efficiency and shortening their lifespan over time. Soap and detergent effectiveness decreases, and fixtures may develop mineral deposits. A water softener is recommended for households to reduce these effects and protect plumbing and appliances from ongoing mineral accumulation. Residents seeking authoritative water quality data, including specific hardness values and contaminant levels, should consult the City of Alvin's official annual Consumer Confidence Report or the EPA's SDWIS database directly.
Geology & Source: Brazos River drains Permian red beds and evaporites; Chicot Aquifer — shallow Quaternary coastal sands interbedded with marine shell hash and calcareous clay; dissolved calcium from both sources drives hard water
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Frequently Asked Questions
Is Alvin's water safe to drink?
Do I need a water softener in Alvin?
How does Alvin compare to the USA average?
Data Sources & Methodology
Water quality data for Alvin 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.