Where does the water in 79843 come from?

Water for zip code 79843 in Marfa, Texas is provided by 3 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 79843

Q: Is the water hard in Marfa, TX (79843)?

The average water hardness in 79843 is 56 PPM (3.3 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 79843?

At 56 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Marfa, Texas · Presidio County

56 PPM

3.3 GPG

Soft

0Soft60120180300+

Estimated — Nearby Data

Dataset updated March 9, 2026Matched to 3 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 3 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

3 estimated sources

This ZIP reading needs local confirmation before equipment sizing or purchase decisions.

Water source profile

Primarily groundwater

Groundwater commonly picks up calcium and magnesium after contact with rock and soil. 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 79843

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.

3 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.

Water System	Source	Hardness	Pop. Served	Data Source
City Of Marfa TX1890001	groundwater	56 PPM Soft	1,788	Estimated — Nearby Data
Candelaria Wsc TX1890011	groundwater	56 PPM Soft	138	Estimated — Nearby Data
Shafter Mine TX1890018	groundwater	56 PPM Soft	32	Estimated — Nearby Data

City Of Marfa

TX1890001

Soft

56 PPMgroundwater1,788 servedEstimated — Nearby Data

Candelaria Wsc

TX1890011

Soft

56 PPMgroundwater138 servedEstimated — Nearby Data

Shafter Mine

TX1890018

Soft

56 PPMgroundwater32 servedEstimated — Nearby Data

Nearby Zip Codes

7984556

What This Means For You

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

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft 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 Marfa, TX (79843).

Submit Your Data

Frequently Asked Questions

Is the water hard in Marfa, TX (79843)?

Our estimate for 79843 is 56 PPM (3.3 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.

Do I need a water softener in 79843?

Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.

Is hard water in 79843 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 79843?

Zip code 79843 in Marfa, Texas is served by 3 water systems.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

10 min read

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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