WH

Water Hardness in 74451

Park Hill, Oklahoma · Cherokee County

110 PPM
6.4 GPG
Slightly Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 5 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 5 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 USGS-backed sources
5 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
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 74451

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.

5 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.
Tahlequah Pwa
OK1021701
Slightly Hard
110 PPMsurface water14,458 servedHigh Confidence - USGS Monitoring
Stickross Mountain Water Co
OK4001118
Slightly Hard
109 PPMsurface water3,250 servedEstimated - County Avg
Burnt Cabin Rwd
OK1021763
Slightly Hard
98 PPMsurface water208 servedHigh Confidence - USGS Monitoring
Pettit Mountain Water
OK1021702
Slightly Hard
98 PPMsurface water90 servedHigh Confidence - USGS Monitoring
Suburban Mhp
OK2001104
Hard
206 PPMgroundwater50 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

7442710874435106744349874471110749311407442310174962107749451087446411074403987444613874441110

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.

MethodologyData sourcesHow 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 Park Hill, OK (74451).

Submit Your Data

Frequently Asked Questions

Is the water hard in Park Hill, OK (74451)?

The average water hardness in 74451 is 110 PPM (6.4 GPG), which is classified as slightly hard.

Do I need a water softener in 74451?

At 110 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 74451 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 74451?

Zip code 74451 in Park Hill, Oklahoma is served by 5 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

8 min read

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

TDS vs Water Hardness: What's the Difference?

TDS and water hardness measure different things. Learn why a TDS meter can't tell you if your water is hard, and which test you actually need.

7 min read