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Water Hardness in 74338

Colcord, Oklahoma · Delaware County

127 PPM
7.4 GPG
Moderately Hard
0Soft60120180300+
High Confidence - USGS Monitoring

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
3 USGS-backed sources
4 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 74338

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.
West Siloam Springs
OK3002109
Moderately Hard
130 PPMsurface water877 servedHigh Confidence - USGS Monitoring
Colcord Pwa
OK2002157
Moderately Hard
130 PPMsurface water819 servedHigh Confidence - USGS Monitoring
Delaware Co Rwsg&Swm District 11
OK3002157
Moderately Hard
124 PPMsurface water750 servedEstimated - County Avg
New Life Ranch, Flint Valley
OK2002151
Soft
53 PPMgroundwater35 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

7434712874368124749641047274730743461157436412472734337272231727613074342126727363174965104

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 Colcord, OK (74338).

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Frequently Asked Questions

Is the water hard in Colcord, OK (74338)?

The average water hardness in 74338 is 127 PPM (7.4 GPG), which is classified as moderately hard.

Do I need a water softener in 74338?

With hardness of 127 PPM, a water softener is worth considering for homes in 74338.

Is hard water in 74338 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 74338?

Zip code 74338 in Colcord, Oklahoma is served by 4 water systems.

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