Hayden Water Hardness & Quality Report (2026)
Water Hardness
6.1 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
245.5 mg/L
Est. Daily Cost
$0.28
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 Hayden, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Hayden | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.4 yrs | 15 yrs | -24% |
Regional Water Comparison
How Hayden compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hayden, Idaho | 104 mg/L | 2.2 ppt | 🟡 Moderately Hard | reservoir |
| Coeur d'Alene, Idaho | 60 mg/L | 1.5 ppt | 🟡 Moderately Hard | reservoir |
| Post Falls, Idaho | 46 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Spokane Valley, Washington | 55.5 mg/L | 2.5 ppt | 🟢 Soft | reservoir |
| Opportunity, Washington | 35 mg/L | 1.9 ppt | 🟢 Soft | reservoir |
National Benchmark
How Hayden compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hayden | 104 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hayden's Water Unique?
Local geology and source profile
Hayden, Idaho, in Kootenai County — a Kootenai County city adjacent to Coeur d'Alene and Post Falls in the north Idaho panhandle — receives its water from local utilities drawing from the Rathdrum Prairie Aquifer (Kootenai County) through the north Idaho distribution.
The moderately hard 104 mg/L hardness and TDS of 245.5 mg/L reflect the north Idaho Rathdrum Prairie Aquifer's moderate glaciofluvial character — consistent with other Kootenai County communities (Coeur d'Alene: ~103 mg/L; Post Falls: ~105 mg/L). The Rathdrum Prairie Aquifer at Kootenai County is developed in Pleistocene Missoula Flood glaciofluvial outwash gravel (slightly calcareous — primary hardness contributor), Pleistocene glacial till (calcareous), and minor Precambrian Belt Series metasedimentary (slightly calcareous).
At 104 mg/L, Hayden's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 2.2 ppt is very low — the north Idaho Kootenai County rural corridor has minimal adjacent AFFF military PFAS sources, making Hayden one of the lower-PFAS communities in the region.
Geology & Source: Hayden in Kootenai County draws from the Hayden Area Regional Sewer Board or Avista Utilities area water on the Rathdrum Prairie Aquifer (Kootenai County, north Idaho) — the Rathdrum Prairie Aquifer is developed in Pleistocene glaciofluvial outwash gravel (slightly calcareous) from the Selkirk Mountains — Idaho Kootenai County Rathdrum Prairie Pleistocene glaciofluvial aquifer produces moderately hard water at 104 mg/L with TDS 245.5 mg/L.