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Water Hardness in Kiefer, OK

Oklahoma · 1 zip codes · 2 matched water systems

140 PPM
8.2 GPG
Moderately Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 140 PPM

Dataset updated March 9, 20262 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Sapulpa
OK1020404
Water source: surface water
Serves: 19,702
USGS environmental estimate: 98 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 2 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
2 verified treated-water sources
2 matched systems total for this city; treated-water reports are prioritized when available.
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 Kiefer

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

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.
Sapulpa
OK1020404
Moderately Hard
140 PPMsurface water19,702 servedVerified — Annual Water Quality Report
Source water: 98 PPM
Creek Co Rwd # 2
OK3001902
Moderately Hard
140 PPMsurface water12,788 servedVerified — Annual Water Quality Report
Source water: 98 PPM

Zip Codes in Kiefer, OK

What This Means For You

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

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

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Frequently Asked Questions

How hard is the water in Kiefer, OK?

The citywide weighted average water hardness in Kiefer, OK is 140 PPM (8.2 GPG), classified as moderately hard. This is based on 2 matched water systems.

Do I need a water softener in Kiefer, OK?

With a citywide average hardness of 140 PPM, a water softener is worth considering for homes in Kiefer. Confirm your tap reading before sizing equipment.

Is hard water in Kiefer, OK 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 Kiefer, OK?

Kiefer, Oklahoma is served by 2 matched water systems across 1 zip code.

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