Plainfield Water Hardness & Quality Report (2026)
Water Hardness
10.9 grains per gallon
Source
river
pH Level
8.1
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
372.7 mg/L
Est. Daily Cost
$0.50
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 Plainfield, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Plainfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.4 yrs | 8.5 yrs | -60% |
| Washing Machine | 6.7 yrs | 12 yrs | -44% |
| Water Heater | 8.1 yrs | 15 yrs | -46% |
Regional Water Comparison
How Plainfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Plainfield, Indiana | 186.5 mg/L | 5.8 ppt | 🔴 Very Hard | river |
| Avon, Indiana | 263 mg/L | 8.5 ppt | 🔴 Very Hard | river |
| Fairfield Heights, Indiana | 162 mg/L | 4.9 ppt | 🟠 Hard | river |
| Brownsburg, Indiana | 167 mg/L | 5.1 ppt | 🟠 Hard | river |
| Indianapolis, Indiana | 277.5 mg/L | 9 ppt | 🔴 Very Hard | river |
National Benchmark
How Plainfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Plainfield | 186.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Plainfield's Water Unique?
Local geology and source profile
Plainfield, Indiana, in Hendricks County — a major west Indianapolis suburban community (Plainfield is a significant Hendricks County town — one of the most important west Indianapolis suburban and logistics communities; Plainfield has grown dramatically as a major distribution and warehousing hub (its location at the I-70 and I-465 junction west of Indianapolis, adjacent to Indianapolis International Airport, makes it one of the most strategically located distribution center communities in the Midwest; FedEx, Amazon, and numerous major logistics companies have major facilities in Plainfield)), a diverse Hendricks County community with a primarily working-class, logistics industry, and suburban family population, adjacent to Avon and Mooresville in the west Indianapolis corridor, home of a major retail corridor along US-40, and one of Indiana's fastest-growing logistics communities — draws its municipal water supply from the buried valley aquifer via the Town of Plainfield Water Division. Water hardness in Plainfield measures 186.5 mg/L — classified as hard.
Plainfield's hard supply reflects the Hendricks County west Indianapolis dolomite aquifer's calcareous character. The Teays Valley buried aquifer at Plainfield–Hendricks County draws from the Silurian Niagaran Dolomite (calcareous dolomite) and Quaternary glacial till (calcareous-moderate). Town of Plainfield applies limited softening, producing the hard 186.5 mg/L.
At 186.5 mg/L, Plainfield residents face regular hard water challenges. Monthly descaling and water softeners are recommended. Town of Plainfield Water Division consistently delivers water meeting all Indiana DEM and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Teays Valley buried aquifer (White River drainage) via the Town of Plainfield Water Division — the Hendricks County west Indianapolis suburban Plainfield corridor (Silurian calcareous Niagaran Dolomite and Quaternary calcareous-moderate glacial till — the calcareous west Indianapolis Hendricks County dolomite aquifer; limited softening); hard supply at 186.5 mg/L in Hendricks County.