Where does the water in 74636 come from?

Water for zip code 74636 in Deer Creek, 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 74636

Deer Creek, Oklahoma · Grant County

531 PPM

31.1 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 74636

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
Deer Creek OK2002711	groundwater	531 PPM Very Hard	147	High Confidence - USGS Monitoring

Deer Creek

OK2002711

Very Hard

531 PPMgroundwater147 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

74646288 73759531 74631295 74643531 74632288 74653291 67022335 74640200 67140335 73766531 74601288 74630875

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 Deer Creek, OK (74636).

Submit Your Data

Frequently Asked Questions

Is the water hard in Deer Creek, OK (74636)?

The average water hardness in 74636 is 531 PPM (31.1 GPG), which is classified as very hard.

Do I need a water softener in 74636?

With hardness of 531 PPM, a water softener is recommended for homes in 74636.

Is hard water in 74636 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 74636?

Zip code 74636 in Deer Creek, Oklahoma is served by 1 water system.