Where does the water in 74864 come from?

Water for zip code 74864 in Prague, Oklahoma 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 74864

Prague, Oklahoma · Lincoln County

465 PPM

27.2 GPG

Very Hard

0Soft60120180300+

High Confidence - USGS Monitoring

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 USGS-backed source

1 matched system total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 74864

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
Prague OK2004101	groundwater	465 PPM Very Hard	2,395	High Confidence - USGS Monitoring

Prague

OK2004101

Very Hard

465 PPMgroundwater2,395 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

74869465 74860465 74855248 74829465 74840229 74804243 74026349 74868163 74834349 74833154 74079349 74837163

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.

Methodology Data sources 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 Prague, OK (74864).

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Frequently Asked Questions

Is the water hard in Prague, OK (74864)?

The average water hardness in 74864 is 465 PPM (27.2 GPG), which is classified as very hard.

Do I need a water softener in 74864?

With hardness of 465 PPM, a water softener is recommended for homes in 74864.

Is hard water in 74864 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 74864?

Zip code 74864 in Prague, Oklahoma is served by 1 water system.