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City water profile

Topeka water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Topeka, Kansas.

Median indexed hardness

245PPM

19 indexed ZIPs

Range 243–245 PPM

State comparison
44 PPM below
State hardness rank
#302 of 484
Matched utilities
5
Active health records
0

City summary

What the indexed records say

Topeka has 19 published ZIP profiles across Shawnee County. The indexed median is 245 PPM, compared with 289 PPM across Kansas.

Among the 484 Kansascities with an indexed median, Topeka ranks #302from highest to lowest. Across all 541 state ZIP profiles, available estimates run from 72.2to 707 PPM.

The 243–245 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard19 ZIPs

19 of 19 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
5 miles
Profiles with evidence
19/19

Confidence labels

High: 0Moderate: 19Low: 0

Observation window: Jan 11, 2016 to Jun 9, 2026.

ZIP directory

Water reports in Topeka

Open a ZIP for site-level provenance and measurements.

ZIP code

66409

Very Hard

243 PPM

Nearest site
13.7 mi
Confidence
Moderate

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ZIP code

66603

Very Hard

245 PPM

Nearest site
2.4 mi
Confidence
Moderate

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ZIP code

66604

Very Hard

245 PPM

Nearest site
2.3 mi
Confidence
Moderate

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ZIP code

66605

Very Hard

245 PPM

Nearest site
5.9 mi
Confidence
Moderate

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ZIP code

66606

Very Hard

245 PPM

Nearest site
0.8 mi
Confidence
Moderate

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ZIP code

66607

Very Hard

245 PPM

Nearest site
4.8 mi
Confidence
Moderate

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ZIP code

66608

Very Hard

245 PPM

Nearest site
2.9 mi
Confidence
Moderate

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ZIP code

66609

Very Hard

245 PPM

Nearest site
7.1 mi
Confidence
Moderate

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ZIP code

66610

Very Hard

245 PPM

Nearest site
9.5 mi
Confidence
Moderate

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ZIP code

66611

Very Hard

245 PPM

Nearest site
3.8 mi
Confidence
Moderate

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ZIP code

66612

Very Hard

245 PPM

Nearest site
2.9 mi
Confidence
Moderate

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ZIP code

66614

Very Hard

245 PPM

Nearest site
7.8 mi
Confidence
Moderate

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ZIP code

66615

Very Hard

245 PPM

Nearest site
9.8 mi
Confidence
Moderate

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ZIP code

66616

Very Hard

245 PPM

Nearest site
5 mi
Confidence
Moderate

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ZIP code

66617

Very Hard

245 PPM

Nearest site
6.6 mi
Confidence
Moderate

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ZIP code

66618

Very Hard

245 PPM

Nearest site
5 mi
Confidence
Moderate

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ZIP code

66619

Very Hard

245 PPM

Nearest site
8.7 mi
Confidence
Moderate

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ZIP code

66621

Very Hard

245 PPM

Nearest site
2.8 mi
Confidence
Moderate

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ZIP code

66622

Very Hard

245 PPM

Nearest site
3.2 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Topeka, City Of

PWSID KS2017701

Surface water
System population served
125,963
Last reported
May 15, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Shawnee Co Rwd 4c

PWSID KS2017718

Surface water
System population served
12,000
Last reported
May 15, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Shawnee Co Rwd 3c

PWSID KS2017717

Surface water
System population served
2,675
Last reported
May 15, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Shawnee Co Rwd 2c

PWSID KS2017713

Surface water
System population served
700
Last reported
May 15, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Metro Topeka Airport Authority

PWSID KS2117703

Surface water
System population served
500
Last reported
May 15, 2026

The system names this served city; Census place overlap links the city to this 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
Total Haloacetic Acids (HAA5)KS2117703Oct 1, 2025Archived
TTHMKS2117703Oct 1, 2025Archived
LEAD AND COPPER RULE REVISIONSKS2017717Jul 2, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSKS2017713Jul 2, 2025Unaddressed
Total Haloacetic Acids (HAA5)KS2017717Apr 1, 2025Resolved · health-based
Total Haloacetic Acids (HAA5)KS2017717Jan 1, 2025Resolved · health-based
Total Haloacetic Acids (HAA5)KS2117703Jan 1, 2025Resolved · health-based
Total Haloacetic Acids (HAA5)KS2017717Oct 1, 2024Resolved · health-based
Total Haloacetic Acids (HAA5)KS2117703Oct 1, 2024Resolved · health-based
Total Haloacetic Acids (HAA5)KS2017717Jul 1, 2024Resolved · 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 Topeka

Is the water hard?

The indexed city median is 245 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.