Peru Water Hardness & Quality Report (2026)
Water Hardness
14.8 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
630.2 mg/L
Est. Daily Cost
$0.67
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 Peru, your appliances are currently losing 34% efficiency due to mineral buildup.
| Appliance | In Peru | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.3 yrs | 12 yrs | -64% |
| Water Heater | 5.5 yrs | 15 yrs | -63% |
Regional Water Comparison
How Peru compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Peru, Indiana | 252.5 mg/L | 8.1 ppt | 🔴 Very Hard | river |
| Wabash, Indiana | 279.5 mg/L | 9.1 ppt | 🔴 Very Hard | river |
| Kokomo, Indiana | 267 mg/L | 8.7 ppt | 🔴 Very Hard | river |
| Logansport, Indiana | 143 mg/L | 4.2 ppt | 🟠 Hard | river |
| Marion, Indiana | 158 mg/L | 4.7 ppt | 🟠 Hard | river |
National Benchmark
How Peru compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Peru | 252.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Peru's Water Unique?
Local geology and source profile
Peru, Indiana, in Miami County — the Miami County seat adjacent to Bunker Hill and Macy on the Mississinewa River in north-central Indiana — receives its water from the City of Peru Water Department, drawing from the Mississinewa River through the north-central Indiana distribution.
The very hard 252.5 mg/L hardness and high TDS of 630.2 mg/L reflect the Miami County Mississinewa River supply's very hard dolomitic character — the Silurian Niagaran Dolomite and Devonian Onondaga Limestone are highly calcareous formations in the north-central Indiana Kankakee Arch, and the Mississinewa River acquires substantial dissolved mineral content from its extensive dolomite-limestone drainage (compare Bunker Hill IN: 248/619 in Miami County comparable; Macy IN: 256/641 in Miami County comparable; Peru consistent very hard from the same Miami County Mississinewa River Silurian dolomitic supply). The Mississinewa watershed — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Devonian Onondaga Limestone (highly calcareous — secondary contributor), and Quaternary Mississinewa alluvium (calcareous — TDS contributor).
At 252.5 mg/L with TDS 630, Peru's water is very hard — a water softener is strongly recommended to protect plumbing and appliances. The PFAS level of 8.1 ppt is elevated — a certified drinking water filter with PFAS removal is recommended. Review the City of Peru's annual water quality report.
Geology & Source: Peru in Miami County draws from the Peru Water on the Mississinewa River (Miami County, north-central Indiana) — the Mississinewa watershed at Miami County drains Silurian Niagaran Dolomite (highly dolomitic) and Devonian Onondaga Limestone (highly calcareous) — Indiana Miami County Mississinewa River Silurian dolomitic supply produces very hard water at 252.5 mg/L with TDS 630.2 mg/L.