Water Hardness in 83402
Idaho Falls, Idaho · Bonneville County
Dataset updated March 9, 2026Matched to 11 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 11 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 83402
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 |
|---|---|---|---|
| Idaho Falls City Of ID7100039 | groundwater | 200 PPM HardUSGS estimate: 250 PPM | |
| Falls Water Company Inc ID7100030 | groundwater | 200 PPM HardUSGS estimate: 250 PPM | |
| Ammon City Of ID7100004 | groundwater | 200 PPM HardUSGS estimate: 250 PPM | |
| Ucon City Of ID7100094 | groundwater | 200 PPM HardUSGS estimate: 250 PPM | |
| 3D Water Association ID7100201 | groundwater | 200 PPM HardUSGS estimate: 250 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 Idaho Falls, ID (83402).
Frequently Asked Questions
Is the water hard in Idaho Falls, ID (83402)?
The average water hardness in 83402 is 200 PPM (11.7 GPG), which is classified as hard.
Do I need a water softener in 83402?
With hardness of 200 PPM, a water softener is recommended for homes in 83402.
Is hard water in 83402 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 83402?
Zip code 83402 in Idaho Falls, Idaho is served by 11 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.
8 min readWater Hardness Scale: PPM and GPG Chart
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