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City water profile

Chickasha water quality

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

Median indexed hardness

380PPM

One indexed ZIP

Range 380–380 PPM

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

City summary

What the indexed records say

Chickasha has 1 published ZIP profile across Grady County. The indexed median is 380 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Chickasha ranks #15from 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
33.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

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

ZIP directory

Water reports in Chickasha

Open a ZIP for site-level provenance and measurements.

ZIP code

73018

Very Hard

380 PPM

Nearest site
33.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Chickasha Municipal Authority

PWSID OK1010821

Surface water
System population served
16,036
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
LEAD AND COPPER RULE REVISIONSOK1010821Oct 17, 2024Addressed · health-based
LEAD AND COPPER RULE REVISIONSOK1010821Oct 17, 2024Addressed
Revised Total Coliform RuleOK1010821Mar 1, 2024Resolved
ChlorineOK1010821Jan 1, 2024Resolved
Consumer Confidence RuleOK1010821Oct 2, 2023Resolved
Interim Enhanced Surface Water Treatment RuleOK1010821Sep 1, 2023Archived · health-based
Interim Enhanced Surface Water Treatment RuleOK1010821Sep 1, 2023Archived · health-based
Interim Enhanced Surface Water Treatment RuleOK1010821Aug 1, 2023Archived · health-based
Interim Enhanced Surface Water Treatment RuleOK1010821Aug 1, 2023Archived · health-based
Interim Enhanced Surface Water Treatment RuleOK1010821Aug 1, 2022Resolved · health-based

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 Chickasha

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.