Rochester Water Hardness & Quality Report (2026)
Water Hardness
13.3 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
578.1 mg/L
Est. Daily Cost
$0.61
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 Rochester, your appliances are currently losing 30% efficiency due to mineral buildup.
| Appliance | In Rochester | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.1 yrs | 8.5 yrs | -75% |
| Washing Machine | 5.2 yrs | 12 yrs | -57% |
| Water Heater | 6.5 yrs | 15 yrs | -57% |
Regional Water Comparison
How Rochester compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rochester, Michigan | 227.5 mg/L | 12.5 ppt | 🔴 Very Hard | river |
| Rochester Hills, Michigan | 227.5 mg/L | 12.5 ppt | 🔴 Very Hard | river |
| Troy, Michigan | 232.5 mg/L | 12.8 ppt | 🔴 Very Hard | river |
| Auburn Hills, Michigan | 83 mg/L | 5.2 ppt | 🟡 Moderately Hard | river |
| Shelby, Michigan | 201.5 mg/L | 11.2 ppt | 🔴 Very Hard | river |
National Benchmark
How Rochester compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rochester | 227.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rochester's Water Unique?
Local geology and source profile
Rochester, Michigan, in Oakland County — an Oakland County city adjacent to Rochester Hills and Auburn Hills on Paint Creek in southeast Michigan — receives its water from the Rochester Water system, drawing from Paint Creek or the Clinton River (Oakland County) through the southeast Michigan distribution.
The very hard 227.5 mg/L hardness and TDS of 578.1 mg/L reflect the southeast Michigan Oakland County Michigan Basin supply's very hard dolomitic character — the Silurian Niagaran Dolomite and Devonian Lucas Dolomite produce very hard dolomitic water typical of the southeast Michigan communities drawing from the Michigan Basin calcareous drainage (compare Connersville IN: 231 mg/L; Worthington MN: 229 mg/L on similar dolomitic supplies). The Clinton River at Oakland County — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Devonian Lucas Dolomite (dolomitic — secondary contributor), and Quaternary Michigan glacial outwash (calcareous — TDS contributor).
At 227.5 mg/L with TDS 578, Rochester's water is very hard. A water softener is strongly recommended to prevent rapid scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 12.5 ppt is high — a certified drinking water filter with PFAS removal is strongly recommended — the Oakland County southeast Michigan industrial and former GM/manufacturing corridor contribute to Rochester's elevated PFAS readings.
Geology & Source: Rochester in Oakland County draws from the Rochester Water on Paint Creek or Clinton River (Oakland County, southeast Michigan) — the Clinton River at Oakland County drains the Michigan Basin (Silurian Niagaran Dolomite — highly dolomitic) and Devonian Lucas Dolomite (dolomitic) — Michigan Oakland County Clinton River Silurian-Devonian dolomitic supply produces very hard water at 227.5 mg/L with TDS 578.1 mg/L.