Water Hardness in 74347
Kansas, Oklahoma · Delaware County
Dataset updated March 9, 2026Matched to 4 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 4 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 74347
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 |
|---|---|---|---|
South Delaware Co Regional Water Auth. OK1221645 | surface water | 130 PPM Moderately Hard | |
Kansas Public Works Authority OK2002135 | surface water | 130 PPM Moderately Hard | |
Delaware Co Rwsg&Swm District 11 OK3002157 | surface water | 124 PPM Moderately Hard | |
Adair Co Rws & Swmd #6 OK2000145 | groundwater | 53 PPM Soft |
Nearby Zip Codes
What This Means For You
Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
Moderately Hard Water
Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | 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 Kansas, OK (74347).
Frequently Asked Questions
Is the water hard in Kansas, OK (74347)?
The average water hardness in 74347 is 128 PPM (7.5 GPG), which is classified as moderately hard.
Do I need a water softener in 74347?
With hardness of 128 PPM, a water softener is worth considering for homes in 74347.
Is hard water in 74347 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 74347?
Zip code 74347 in Kansas, Oklahoma is served by 4 water systems.
Learn More About Your Water
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Salt-based softeners remove hardness minerals. Salt-free conditioners prevent scale but don't soften. Here's how to choose based on your water hardness level.
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We tested KDF, Vitamin C, and carbon shower filters for hard water. Here are the filters that actually reduce mineral buildup on hair and skin.
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