Miamisburg Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.8
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
262.1 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 Miamisburg, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Miamisburg | 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 Miamisburg compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Miamisburg, Ohio | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| West Carrollton City, Ohio | ≈ 120–179 mg/L | 4.2 ppt | 🟠 Hard | river |
| Franklin, Ohio | ≈ 120–179 mg/L | 4.1 ppt | 🟠 Hard | groundwater |
| Springboro, Ohio | ≈ 180+ mg/L | 32.6 ppt | 🔴 Very Hard | groundwater |
| Kettering, Ohio | ≈ 120–179 mg/L | 66.1 ppt | 🟠 Hard | river |
National Benchmark
How Miamisburg compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Miamisburg | ≈ 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 Miamisburg's Water Unique?
Local geology and source profile
The City of Miamisburg Public Works Department operates the Miamisburg Water Treatment Facility, serving approximately 20,000 residents in the city and surrounding areas within Montgomery County, Ohio. Water is sourced exclusively from the Great Miami River Buried Valley Aquifer System, a groundwater resource. The facility includes a reverse osmosis (R/O) softening plant installed in October 2018 to manage mineral content, with distribution covering the municipal service area in southern Montgomery County.
The Great Miami River watershed drains a 6,700-square-mile area in western Ohio, with the buried valley aquifer underlying the river valley. This aquifer was formed by Pleistocene glacial outwash sands and gravels deposited atop Ordovician shales and Silurian-Devonian limestones of the Cincinnati Arch region. These carbonate-rich formations dissolve to impart minerals, yielding a characteristically hard supply influenced by limestone aquifers prevalent in the Midwest's glacial drift geology; the confined nature of the aquifer concentrates geological minerals.
Hard water leads to scale buildup in pipes, water heaters, dishwashers, and washing machines, with affected appliances showing white deposits and requiring more detergent and soap. Regular vinegar flushes for fixtures, annual water heater draining, and descaling are recommended maintenance steps. A home water softener is advisable alongside the utility's own reverse osmosis softening. The 2024 Consumer Confidence Report confirms EPA compliance with no lead or copper violations — 90th percentile copper at 0.45 mg/L; primary contaminants like iron and manganese are treated via filtration and softening, and the treatment process includes groundwater pumping, aeration, reverse osmosis, chlorination, and fluoridation, with pH regulated to 7.5–8.5.
Geology & Source: Great Miami River Buried Valley Aquifer, Montgomery County — Pleistocene glacial outwash sands and gravels atop Ordovician shales and Silurian-Devonian limestones; carbonate bedrock dissolution produces characteristically hard supply
Other Ohio Water Reports
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Frequently Asked Questions
Is Miamisburg's water safe to drink?
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How does Miamisburg compare to the USA average?
Data Sources & Methodology
Water quality data for Miamisburg 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.