Water Hardness in 78124
Marion, Texas · Guadalupe County
Dataset updated March 9, 2026Matched to 7 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 7 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 78124
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 |
|---|---|---|---|
Green Valley Sud TX0940020 | surface water | 239 PPM Hard | |
City Of Schertz TX0940003 | groundwater | 263 PPM Very Hard | |
Springs Hill Sud TX0940022 | surface water | 250 PPM Very Hard | |
City Of Seguin TX0940002 | surface water | 250 PPM Very Hard | |
Crystal Clear Sud TX0940015 | surface water | 150 PPM Moderately HardUSGS estimate: 208 PPM |
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.
Hard Water - Treatment Recommended
Your water is hard. Scale buildup is likely affecting your plumbing and appliances, reducing their lifespan and efficiency. A water softener is recommended to protect your home.
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 Marion, TX (78124).
Frequently Asked Questions
Is the water hard in Marion, TX (78124)?
The average water hardness in 78124 is 238 PPM (13.9 GPG), which is classified as hard.
Do I need a water softener in 78124?
With hardness of 238 PPM, a water softener is recommended for homes in 78124.
Is hard water in 78124 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 78124?
Zip code 78124 in Marion, Texas is served by 7 water systems.
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