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City water profile

Lawton water quality

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

Median indexed hardness

380PPM

4 indexed ZIPs

Range 298–389 PPM

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

City summary

What the indexed records say

Lawton has 4 published ZIP profiles across Comanche County. The indexed median is 380 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Lawton ranks #20from highest to lowest. Across all 148 state ZIP profiles, available estimates run from 7to 610 PPM.

The 298–389 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 hard4 ZIPs

4 of 4 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
49.3 miles
Profiles with evidence
4/4

Confidence labels

High: 0Moderate: 0Low: 4

Observation window: Jan 20, 2016 to Jun 3, 2026.

ZIP directory

Water reports in Lawton

Open a ZIP for site-level provenance and measurements.

ZIP code

73501

Very Hard

380 PPM

Nearest site
41.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

73503

Very Hard

389 PPM

Nearest site
49.3 mi
Confidence
Low

View full ZIP evidence →

ZIP code

73505

Very Hard

298 PPM

Nearest site
41.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

73507

Very Hard

380 PPM

Nearest site
52.4 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Lawton

PWSID OK1011303

Surface water
System population served
92,757
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
TTHMOK1011303Jul 1, 2024Resolved
Total Haloacetic Acids (HAA5)OK1011303Jul 1, 2024Resolved
Surface Water Treatment RuleOK1011303Jan 1, 2024Resolved

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 Lawton

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.