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Water Hardness in 83237

Franklin, Idaho · Franklin County

202 PPM
11.8 GPG
Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 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.

Source basis
2 USGS-backed sources
2 matched systems total for this ZIP; 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 Serving 83237

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.

2 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.
Franklin City Of
ID6210007
Hard
202 PPMsurface water1,000 servedHigh Confidence - USGS Monitoring
Oakdell Farms Llc
ID6210015
Hard
202 PPMgroundwater75 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

843202028433320083263327843382008323224083286411843353178431820084327200843052018328724484304200

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.

MethodologyData sourcesHow 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 Franklin, ID (83237).

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Frequently Asked Questions

Is the water hard in Franklin, ID (83237)?

The average water hardness in 83237 is 202 PPM (11.8 GPG), which is classified as hard.

Do I need a water softener in 83237?

With hardness of 202 PPM, a water softener is recommended for homes in 83237.

Is hard water in 83237 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 83237?

Zip code 83237 in Franklin, Idaho is served by 2 water systems.

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