Monroe Water Hardness & Quality Report (2026)
Water Hardness
9.7 grains per gallon
Source
river
pH Level
8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
331.2 mg/L
Est. Daily Cost
$0.44
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 Monroe, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Monroe | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.1 yrs | 8.5 yrs | -52% |
| Washing Machine | 7.5 yrs | 12 yrs | -38% |
| Water Heater | 9 yrs | 15 yrs | -40% |
Regional Water Comparison
How Monroe compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Monroe, Ohio | 166 mg/L | 6.5 ppt | 🟠 Hard | river |
| Middletown, Ohio | 148 mg/L | 5.7 ppt | 🟠 Hard | river |
| Mason, Ohio | 113 mg/L | 4.3 ppt | 🟡 Moderately Hard | river |
| Lebanon, Ohio | 193.5 mg/L | 7.6 ppt | 🔴 Very Hard | river |
| Springboro, Ohio | 104.5 mg/L | 4 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Monroe compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Monroe | 166 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Monroe's Water Unique?
Local geology and source profile
Monroe, Ohio, in Butler County — a Butler County city adjacent to Middletown and Mason on the Great Miami River in southwest Ohio — receives its water from the City of Monroe Water or the Greater Cincinnati Water Works regional supply, drawing from the Great Miami River (Butler County) through the southwest Ohio distribution.
The hard 166 mg/L hardness and TDS of 331.2 mg/L reflect the southwest Ohio Butler County Great Miami River supply's hard calcareous character — driven by the Silurian Lockport Dolomite and Pleistocene calcareous glacial till dissolution along the Great Miami River corridor, consistent with the southwest Ohio Great Miami communities (Englewood OH: 181.5 mg/L upstream; Monroe at mid-river). The Great Miami River at Butler County — Silurian Lockport Dolomite (dolomitic — primary hardness contributor), Ordovician Cincinnati Group (calcareous — secondary contributor), and Pleistocene calcareous glacial till (calcareous — TDS contributor).
At 166 mg/L, Monroe's water is hard — scale builds steadily in appliances, dishwashers require rinse aid, and faucet aerators need regular cleaning. Quarterly descaling is appropriate and a water softener is beneficial. The PFAS level of 6.5 ppt warrants a certified drinking water filter — Wright-Patterson Air Force Base (Montgomery County — AFFF, upstream Great Miami) contribute to Monroe's elevated PFAS readings.
Geology & Source: Monroe in Butler County draws from the City of Monroe Water on the Great Miami River (Butler County, southwest Ohio) — the Great Miami at Butler County drains the Ohio Till Plains (Silurian Lockport Dolomite — dolomitic) through thick calcareous Pleistocene glacial till — Ohio Butler County Great Miami River Silurian dolomitic calcareous till supply produces hard water at 166 mg/L with TDS 331.2 mg/L.