Water Hardness in 75840
Fairfield, Texas · Freestone 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 75840
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 |
|---|---|---|---|
| City Of Fairfield TX0810001 | groundwater | 120 PPM Moderately Hard | |
| Southern Oaks Water Supply TX0810034 | groundwater | 120 PPM Moderately Hard | |
| Pleasant Grove Wsc TX0810015 | groundwater | 120 PPM Moderately Hard | |
| City Of Fairfield Boyd Unit TX0810037 | groundwater | 120 PPM Moderately Hard | |
| City Of Fairfield - Westwood Utility TX0810024 | groundwater | 120 PPM Moderately Hard |
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 Fairfield, TX (75840).
Frequently Asked Questions
Is the water hard in Fairfield, TX (75840)?
The average water hardness in 75840 is 120 PPM (7 GPG), which is classified as moderately hard.
Do I need a water softener in 75840?
With hardness of 120 PPM, a water softener is worth considering for homes in 75840.
Is hard water in 75840 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 75840?
Zip code 75840 in Fairfield, Texas is served by 11 water systems.
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