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Water Hardness in Clark Fork, ID

Idaho · 1 zip codes · 4 matched water systems

106 PPM
6.2 GPG
Slightly Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
3 USGS-backed sources
4 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Clark Fork

These systems are matched to Clark Fork, ID. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

4 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Sandpoint Public Works Dept
ID1090121
Slightly Hard
106 PPMsurface water12,284 servedHigh Confidence — USGS Monitoring
Dover City Of
ID1090193
Slightly Hard
78 PPMsurface water865 servedHigh Confidence — USGS Monitoring
Clark Fork City Of
ID1090018
Moderately Hard
140 PPMgroundwater730 servedHigh Confidence — USGS Monitoring
Sagle Valley Water Dist
ID1090118
Slightly Hard
106 PPMgroundwater708 servedEstimated — County Avg

Zip Codes in Clark Fork, ID

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Clark Fork, ID.

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Frequently Asked Questions

How hard is the water in Clark Fork, ID?

The citywide weighted average water hardness in Clark Fork, ID is 106 PPM (6.2 GPG), classified as slightly hard. This is based on 4 matched water systems.

Do I need a water softener in Clark Fork, ID?

At 106 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Clark Fork, ID safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Clark Fork, ID?

Clark Fork, Idaho is served by 4 matched water systems across 1 zip code.

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