Where does the water in 77624 come from?

Water for zip code 77624 in Hillister, Texas is provided by 1 water system. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 77624

Q: Is the water hard in Hillister, TX (77624)?

The average water hardness in 77624 is 115 PPM (6.7 GPG), which is classified as slightly hard. A salt-free conditioner can help if you notice minor spotting on dishes.

Q: Do I need a water softener in 77624?

At 115 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Hillister, Texas · Tyler County

115 PPM

6.7 GPG

Slightly Hard

0Soft60120180300+

Estimated — County Avg

Dataset updated March 9, 2026Matched to 1 water systemTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 1 matched water system. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

1 estimated source

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 77624

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.

1 water system

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
Ivanhoe Land Of Lakes TX2290010	groundwater	115 PPM Slightly Hard	1,968	Estimated — County Avg

Ivanhoe Land Of Lakes

TX2290010

Slightly Hard

115 PPMgroundwater1,968 servedEstimated — County Avg

Nearby Zip Codes

7766074 7597971 77616115 7766482 75942115 7766332 7595610 7765644 75938115 7595110 7762532 7761516

What This Means For You

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

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | 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 Hillister, TX (77624).

Submit Your Data

Frequently Asked Questions

Is the water hard in Hillister, TX (77624)?

Our estimate for 77624 is 115 PPM (6.7 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 77624?

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

Is hard water in 77624 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 77624?

Zip code 77624 in Hillister, Texas is served by 1 water system.