Water Hardness in 83687
Nampa, Idaho · Canyon County
Dataset updated March 9, 2026Matched to 10 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 10 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.
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 Serving 83687
These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Nampa City Of ID3140080 | groundwater | 150 PPM Moderately HardUSGS estimate: 196 PPM | |
| Caldwell City Of ID3140013 | groundwater | 150 PPM Moderately HardUSGS estimate: 196 PPM | |
| Middleton City Of ID3140074 | groundwater | 150 PPM Moderately HardUSGS estimate: 110 PPM | |
| Clark Theurer Water Assn ID3140140 | groundwater | 150 PPM Moderately HardUSGS estimate: 198 PPM | |
| Northside Estates Hoa Inc ID3140229 | groundwater | 150 PPM Moderately HardUSGS estimate: 198 PPM |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Nampa, ID (83687).
Frequently Asked Questions
Is the water hard in Nampa, ID (83687)?
The average water hardness in 83687 is 150 PPM (8.8 GPG), which is classified as moderately hard.
Do I need a water softener in 83687?
With hardness of 150 PPM, a water softener is worth considering for homes in 83687.
Is hard water in 83687 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 83687?
Zip code 83687 in Nampa, Idaho is served by 10 water systems.
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