Where does the water in 42262 come from?

Water for zip code 42262 in Oak Grove, Kentucky 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 42262

Q: Is the water hard in Oak Grove, KY (42262)?

The average water hardness in 42262 is 58 PPM (3.4 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 42262?

At 58 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Oak Grove, Kentucky · Christian County

58 PPM

3.4 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 surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. 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 42262

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
Hopkinsville Water Environment Authority KY0240201	surface water	69 PPM Slightly Hard	41,350	Estimated — Nearby Data
Fort Campbell KY0241001	groundwater	24 PPM Soft	22,000	Estimated — Nearby Data
Christian Co Water District KY0240521	surface water	69 PPM Slightly Hard	17,248	Estimated — County Avg
Oak Grove Utilities Office KY0240329	surface water	69 PPM Slightly Hard	8,762	Estimated — Nearby Data

Hopkinsville Water Environment Authority

KY0240201

Slightly Hard

69 PPMsurface water41,350 servedEstimated — Nearby Data

Fort Campbell

KY0241001

Soft

24 PPMgroundwater22,000 servedEstimated — Nearby Data

Christian Co Water District

KY0240521

Slightly Hard

69 PPMsurface water17,248 servedEstimated — County Avg

Oak Grove Utilities Office

KY0240329

Slightly Hard

69 PPMsurface water8,762 servedEstimated — Nearby Data

Nearby Zip Codes

4222357 4226657 37042100 4223657 4228669 4225457 4224057 37040100 37191100 42234146 4223257 37043100

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 Oak Grove, KY (42262).

Submit Your Data

Frequently Asked Questions

Is the water hard in Oak Grove, KY (42262)?

Our estimate for 42262 is 58 PPM (3.4 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 42262?

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

Is hard water in 42262 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 42262?

Zip code 42262 in Oak Grove, Kentucky 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.

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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