Hudson Water Hardness & Quality Report (2026)
Water Hardness
12 grains per gallon
Source
groundwater
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
609.4 mg/L
Est. Daily Cost
$0.55
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 Hudson, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Hudson | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.8 yrs | 8.5 yrs | -67% |
| Washing Machine | 6 yrs | 12 yrs | -50% |
| Water Heater | 7.4 yrs | 15 yrs | -51% |
Regional Water Comparison
How Hudson compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hudson, Wisconsin | 206 mg/L | 5.5 ppt | 🔴 Very Hard | groundwater |
| Stillwater, Minnesota | 272 mg/L | 7.4 ppt | 🔴 Very Hard | river |
| River Falls, Wisconsin | 129 mg/L | 3.8 ppt | 🟠 Hard | groundwater |
| Oakdale, Minnesota | 181 mg/L | 5.3 ppt | 🔴 Very Hard | river |
| Woodbury, Minnesota | 220.5 mg/L | 6.2 ppt | 🔴 Very Hard | river |
National Benchmark
How Hudson compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hudson | 206 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hudson's Water Unique?
Local geology and source profile
Hudson, Wisconsin, in Saint Croix County — the Saint Croix County seat adjacent to Stillwater MN and River Falls on the Saint Croix River in west-central Wisconsin — receives its water from the Hudson Water Utility, drawing from the Saint Croix River or local Jordan Sandstone-Prairie du Chien aquifer (Saint Croix County) through the west-central Wisconsin distribution.
The very hard 206 mg/L hardness and TDS of 609.4 mg/L reflect the west-central Wisconsin Saint Croix County supply's very hard dolomitic character — reflecting the Ordovician Prairie du Chien Dolomite aquifer's extensive dissolution typical of the western Wisconsin dolomite platform communities, with the TDS significantly elevated by the confined aquifer's additional dissolved solids from the deep Cambrian-Ordovician sequence. The Saint Croix County aquifer — Ordovician Prairie du Chien Dolomite (dolomitic — primary hardness contributor), Ordovician Oneota Dolomite (dolomitic — secondary contributor), and Cambrian Jordan Sandstone (insoluble — dilutant).
At 206 mg/L with TDS 609, Hudson'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 5.5 ppt warrants a certified drinking water filter — the Saint Croix County west-central Wisconsin industrial corridor contribute to Hudson's readings.
Geology & Source: Hudson in Saint Croix County draws from the Hudson Water Utility on the Saint Croix River or local Cambrian Jordan Sandstone aquifer (Saint Croix County, west-central Wisconsin) — the Jordan Sandstone aquifer at Saint Croix County is developed in Cambrian Jordan Sandstone (insoluble) and Ordovician Prairie du Chien Dolomite (dolomitic) — Wisconsin Saint Croix County Jordan-Prairie du Chien dolomitic aquifer produces very hard water at 206 mg/L with TDS 609.4 mg/L.