Sauk Rapids Water Hardness & Quality Report (2026)
Water Hardness
15 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
642.6 mg/L
Est. Daily Cost
$0.68
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 Sauk Rapids, your appliances are currently losing 34% efficiency due to mineral buildup.
| Appliance | In Sauk Rapids | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.1 yrs | 12 yrs | -66% |
| Water Heater | 5.4 yrs | 15 yrs | -64% |
Regional Water Comparison
How Sauk Rapids compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sauk Rapids, Minnesota | 256 mg/L | 7 ppt | 🔴 Very Hard | river |
| Saint Cloud, Minnesota | 120 mg/L | 3.9 ppt | 🟠 Hard | river |
| Sartell, Minnesota | 252.5 mg/L | 6.9 ppt | 🔴 Very Hard | river |
| Monticello, Minnesota | 234.5 mg/L | 6.5 ppt | 🔴 Very Hard | river |
| Buffalo, Minnesota | 202 mg/L | 5.8 ppt | 🔴 Very Hard | river |
National Benchmark
How Sauk Rapids compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sauk Rapids | 256 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Sauk Rapids's Water Unique?
Local geology and source profile
Sauk Rapids, Minnesota, in Benton County — a Benton County city adjacent to St. Cloud and Waite Park on the Mississippi River in central Minnesota — receives its water from the City of Sauk Rapids Water, drawing from the Mississippi River (Benton County) through the central Minnesota distribution.
The very hard 256 mg/L hardness and TDS of 642.6 mg/L reflect the central Minnesota Benton County Mississippi River supply's very hard dolomitic character — driven by the Ordovician Prairie du Chien Dolomite dissolution across the central Minnesota plateau, elevated by the confined Cambrian-Ordovician aquifer's concentrated dissolved solids, consistent with the St. Cloud metro area's notoriously hard water from the Prairie du Chien dolomite platform. The Mississippi River at Benton County — Ordovician Prairie du Chien Dolomite (dolomitic — primary hardness contributor), Ordovician Oneota Dolomite (dolomitic — secondary contributor), and Pleistocene calcareous glacial till (calcareous — TDS contributor).
At 256 mg/L with TDS 643, Sauk Rapids' 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 7.0 ppt warrants a certified drinking water filter — the Benton County central Minnesota industrial corridor and the 3M (Washington County — upstream PFAS source) contribute to Sauk Rapids' elevated readings.
Geology & Source: Sauk Rapids in Benton County draws from the City of Sauk Rapids Water on the Mississippi River (Benton County, central Minnesota) — the Mississippi at Benton County drains the Minnesota Plateau (Ordovician Prairie du Chien Dolomite — dolomitic) and Cambrian Jordan Sandstone through calcareous glacial outwash — Minnesota Benton County Mississippi River Ordovician dolomitic calcareous supply produces very hard water at 256 mg/L with TDS 642.6 mg/L.