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City water profile

Tulsa water quality

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

Median indexed hardness

226PPM

25 indexed ZIPs

Range 130–235 PPM

State comparison
At state median
State hardness rank
#55 of 108
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Tulsa has 25 published ZIP profiles across Tulsa County. The indexed median is 226 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Tulsa ranks #55from highest to lowest. Across all 148 state ZIP profiles, available estimates run from 7to 610 PPM.

The 130–235 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
Hard6 ZIPs
Very hard19 ZIPs

25 of 25 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
19.7 miles
Profiles with evidence
25/25

Confidence labels

High: 0Moderate: 19Low: 6

Observation window: Mar 2, 2016 to May 24, 2023.

ZIP directory

Water reports in Tulsa

Open a ZIP for site-level provenance and measurements.

ZIP code

74103

Very Hard

226 PPM

Nearest site
17.1 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

74104

Very Hard

226 PPM

Nearest site
19 mi
Confidence
Moderate

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ZIP code

74105

Very Hard

226 PPM

Nearest site
20.7 mi
Confidence
Moderate

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ZIP code

74106

Very Hard

226 PPM

Nearest site
15.6 mi
Confidence
Moderate

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ZIP code

74107

Very Hard

235 PPM

Nearest site
16.7 mi
Confidence
Moderate

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ZIP code

74108

Hard

130 PPM

Nearest site
70.1 mi
Confidence
Low

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ZIP code

74110

Very Hard

226 PPM

Nearest site
16.2 mi
Confidence
Moderate

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ZIP code

74112

Very Hard

226 PPM

Nearest site
19.7 mi
Confidence
Moderate

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ZIP code

74114

Very Hard

226 PPM

Nearest site
20.4 mi
Confidence
Moderate

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ZIP code

74115

Very Hard

226 PPM

Nearest site
16.2 mi
Confidence
Moderate

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ZIP code

74116

Hard

130 PPM

Nearest site
73.3 mi
Confidence
Low

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ZIP code

74117

Very Hard

226 PPM

Nearest site
13.4 mi
Confidence
Moderate

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ZIP code

74119

Very Hard

226 PPM

Nearest site
17.8 mi
Confidence
Moderate

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ZIP code

74120

Very Hard

226 PPM

Nearest site
18.2 mi
Confidence
Moderate

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ZIP code

74128

Hard

130 PPM

Nearest site
73.5 mi
Confidence
Low

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ZIP code

74129

Hard

130 PPM

Nearest site
74.7 mi
Confidence
Low

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ZIP code

74132

Very Hard

230.5 PPM

Nearest site
20.2 mi
Confidence
Moderate

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ZIP code

74133

Very Hard

226 PPM

Nearest site
16.4 mi
Confidence
Moderate

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ZIP code

74134

Hard

137 PPM

Nearest site
70.5 mi
Confidence
Low

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ZIP code

74135

Very Hard

226 PPM

Nearest site
20.7 mi
Confidence
Moderate

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ZIP code

74136

Very Hard

226 PPM

Nearest site
20.3 mi
Confidence
Moderate

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ZIP code

74137

Very Hard

226 PPM

Nearest site
18.5 mi
Confidence
Moderate

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ZIP code

74145

Very Hard

226 PPM

Nearest site
19.3 mi
Confidence
Moderate

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ZIP code

74146

Hard

130 PPM

Nearest site
73.8 mi
Confidence
Low

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ZIP code

74171

Very Hard

226 PPM

Nearest site
20.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Tulsa

PWSID OK1020418

Surface water
System population served
413,000
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.

No violation records are included in the current lookback window.

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 Tulsa

Is the water hard?

The indexed city median is 226 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.