Where does the water in 71435 come from?

Water for zip code 71435 in Grayson, Louisiana is provided by 4 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 71435

Q: Is the water hard in Grayson, LA (71435)?

The average water hardness in 71435 is 6 PPM (0.4 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 71435?

At 6 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Grayson, Louisiana · Caldwell Parish County

6 PPM

0.4 GPG

Soft

0Soft60120180300+

Estimated — Nearby Data

Dataset updated March 9, 2026Matched to 4 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 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.

Source basis

4 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 71435

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.

4 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
Grayson Water System LA1021005	groundwater	6 PPM Soft	1,461	Estimated — Nearby Data
Holum Water System LA1021007	groundwater	6 PPM Soft	1,230	Estimated — Nearby Data
Wards 4 & 5 Water System LA1021010	groundwater	6 PPM Soft	1,002	Estimated — Nearby Data
Cotton Plant Water System LA1021009	groundwater	6 PPM Soft	783	Estimated — Nearby Data

Grayson Water System

LA1021005

Soft

6 PPMgroundwater1,461 servedEstimated — Nearby Data

Holum Water System

LA1021007

Soft

6 PPMgroundwater1,230 servedEstimated — Nearby Data

Wards 4 & 5 Water System

LA1021010

Soft

6 PPMgroundwater1,002 servedEstimated — Nearby Data

Cotton Plant Water System

LA1021009

Soft

6 PPMgroundwater783 servedEstimated — Nearby Data

Nearby Zip Codes

714156 714416 714188 714652 714802 714738 714792 71425120 71243259 71401120 712262 7125972

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 Grayson, LA (71435).

Submit Your Data

Frequently Asked Questions

Is the water hard in Grayson, LA (71435)?

Our estimate for 71435 is 6 PPM (0.4 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 71435?

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

Is hard water in 71435 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 71435?

Zip code 71435 in Grayson, Louisiana is served by 4 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.

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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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