Greenville Water Hardness & Quality Report (2026)
Water Hardness
11.9 grains per gallon
Source
river
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
463.7 mg/L
Est. Daily Cost
$0.54
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 Greenville, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Greenville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.9 yrs | 8.5 yrs | -66% |
| Washing Machine | 6.1 yrs | 12 yrs | -49% |
| Water Heater | 7.5 yrs | 15 yrs | -50% |
Regional Water Comparison
How Greenville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Greenville, Ohio | 203.5 mg/L | 8 ppt | 🔴 Very Hard | river |
| Clayton, Ohio | 206.5 mg/L | 8.1 ppt | 🔴 Very Hard | river |
| Richmond, Indiana | 222 mg/L | 7 ppt | 🔴 Very Hard | river |
| Piqua, Ohio | 204 mg/L | 8 ppt | 🔴 Very Hard | river |
| Englewood, Ohio | 181.5 mg/L | 7.1 ppt | 🔴 Very Hard | river |
National Benchmark
How Greenville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greenville | 203.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Greenville home
Shop water softeners on Amazon.com →
What Makes Greenville's Water Unique?
Local geology and source profile
Greenville, Ohio, in Darke County — the Darke County seat adjacent to Piqua and Eaton in west-central Ohio — receives its water from the Greenville Water System, drawing from Greenville Creek or Prairie Creek (Darke County) through the west-central Ohio distribution.
The hard 203.5 mg/L hardness and TDS of 463.7 mg/L reflect the west-central Ohio Darke County Till Plains supply's hard dolomitic character — the Silurian Niagaran Dolomite and Devonian Columbus Limestone produce very hard dolomitic water typical of the west-central Ohio Till Plains communities (compare Bellefontaine OH: 253 mg/L; Clayton OH: 206.5 mg/L on the harder Montgomery County Great Miami draw). The Greenville Creek at Darke County — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Devonian Columbus Limestone (calcareous — secondary contributor), and Quaternary Ohio glacial till (calcareous — TDS contributor).
At 203.5 mg/L with TDS 464, Greenville's water is hard. A water softener is recommended to prevent scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 8.0 ppt warrants a certified drinking water filter — the Darke County west-central Ohio industrial corridor contribute to Greenville's elevated readings.
Geology & Source: Greenville in Darke County draws from the Greenville Water System on Greenville Creek or Prairie Creek (Darke County, west-central Ohio) — the Stillwater River tributary drainage at Darke County drains the Till Plains (Silurian Niagaran Dolomite — highly dolomitic) and Devonian Columbus Limestone (calcareous) — Ohio Darke County Greenville Creek Silurian-Devonian dolomitic supply produces hard water at 203.5 mg/L with TDS 463.7 mg/L.