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City water profile

Enid water quality

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

Median indexed hardness

380PPM

3 indexed ZIPs

Range 380–389 PPM

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

City summary

What the indexed records say

Enid has 3 published ZIP profiles across Garfield County. The indexed median is 380 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Enid ranks #21from highest to lowest. Across all 148 state ZIP profiles, available estimates run from 7to 610 PPM.

The 380–389 PPM range shows how much the available ZIP estimates vary within the city label. 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 hard3 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
57.2 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Jan 5, 2016 to May 21, 2026.

ZIP directory

Water reports in Enid

Open a ZIP for site-level provenance and measurements.

ZIP code

73701

Very Hard

380 PPM

Nearest site
58 mi
Confidence
Low

View full ZIP evidence →

ZIP code

73703

Very Hard

389 PPM

Nearest site
57.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

73705

Very Hard

380 PPM

Nearest site
50.7 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Enid

PWSID OK2002412

Surface water
System population served
49,347
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
LEAD AND COPPER RULE REVISIONSOK2002412Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSOK2002412Oct 17, 2024Resolved
TTHMOK2002412Jan 1, 2024Resolved
Total Haloacetic Acids (HAA5)OK2002412Jan 1, 2024Resolved
AsbestosOK2002412Jan 1, 2024Archived
AsbestosOK2002412Jan 1, 2023Archived
AsbestosOK2002412Jan 1, 2022Archived
TTHMOK2002412Sep 1, 2021Resolved
Total Haloacetic Acids (HAA5)OK2002412Sep 1, 2021Resolved

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 Enid

Is the water hard?

The indexed city median is 380 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.