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City water profile

Prague water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Prague, Oklahoma.

Median indexed hardness

249PPM

One indexed ZIP

Range 249–249 PPM

State comparison
23 PPM above
State hardness rank
#51 of 108
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Prague has 1 published ZIP profile across Lincoln County. The indexed median is 249 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Prague ranks #51from highest to lowest. Across all 148 state ZIP profiles, available estimates run from 7to 610 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
38.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 14, 2016 to Aug 14, 2018.

ZIP directory

Water reports in Prague

Open a ZIP for site-level provenance and measurements.

ZIP code

74864

Very Hard

249 PPM

Nearest site
38.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Prague

PWSID OK2004101

Groundwater
System population served
2,395
Last reported
May 13, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
ChlorineOK2004101May 1, 2025Resolved
Revised Total Coliform RuleOK2004101May 1, 2025Resolved
Revised Total Coliform RuleOK2004101Nov 1, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSOK2004101Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSOK2004101Oct 17, 2024Resolved · health-based
E. COLIOK2004101Jul 25, 2024Unaddressed
EndrinOK2004101Jan 1, 2024Archived
DalaponOK2004101Jan 1, 2024Archived
EndothallOK2004101Jan 1, 2024Archived
Di(2-ethylhexyl) adipateOK2004101Jan 1, 2024Archived

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Prague

Is the water hard?

The indexed city median is 249 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.