Sebastian Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
156 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 Sebastian, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Sebastian | 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 Sebastian compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sebastian, Florida | ≈ 120–179 mg/L | 6.8 ppt | 🟠 Hard | groundwater |
| Vero Beach, Florida | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Vero Beach South, Florida | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Palm Bay, Florida | ≈ 120–179 mg/L | 182.9 ppt | 🟠 Hard | groundwater |
| Florida Ridge, Florida | ≈ 120–179 mg/L | 11.3 ppt | 🟠 Hard | groundwater |
National Benchmark
How Sebastian compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sebastian | ≈ 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 Sebastian's Water Unique?
Local geology and source profile
Sebastian, Florida is served by the San Sebastian Woods Water Treatment Facility, operated by Brevard County Utility Services Department. The utility obtains its drinking water from groundwater sources, specifically two wells located in the Micco area that draw from the Surficial Aquifer. The service area encompasses parts of Brevard County in central Florida's Indian River region. The facility treats this groundwater before distributing it to customers and publishes annual Consumer Confidence Reports. Residents seeking current water quality data, lead and copper testing results, or contaminant monitoring information may contact Indian River County Utilities or Brevard County Utility Services directly.
The water supply originates from the Floridan aquifer system and Surficial Aquifer, which underlie the region. These aquifers are composed primarily of Paleocene to Eocene limestone and carbonate formations. As groundwater percolates through these mineral-rich limestone and dolomite deposits, it dissolves calcium and magnesium, resulting in a moderately hard water supply typical of Florida's groundwater-dependent utilities. The carbonate geology of the region naturally produces mineralized water.
At the moderately hard level, residents may notice some scale buildup on fixtures, reduced soap lather, and minor spotting on dishes and glassware. Coffee makers, water heaters, and dishwashers may accumulate mineral deposits over time. A point-of-use water softener or ion-exchange system is recommended for laundry and dishwashing applications, though treatment is not essential. Routine maintenance with vinegar can help dissolve scale from faucets and appliances. According to the 2021 Annual Water Quality Report, the San Sebastian Woods facility experienced exceedances in Color and Iron during monitoring that year.
Geology & Source: Surficial Aquifer and Floridan aquifer system — Paleocene to Eocene limestone and dolomite; carbonate formations dissolve calcium and magnesium; moderately hard groundwater typical of central Florida
Other Florida Water Reports
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Frequently Asked Questions
Is Sebastian's water safe to drink?
Do I need a water softener in Sebastian?
How does Sebastian compare to the USA average?
Data Sources & Methodology
Water quality data for Sebastian 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.