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City water profile

Fresno water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Fresno, California.

Median indexed hardness

4PPM

21 indexed ZIPs

Range 3.3–19 PPM

State comparison
185 PPM below
State hardness rank
#242 of 242
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Fresno has 21 published ZIP profiles across Fresno County. The indexed median is 4 PPM, compared with 189 PPM across California.

Among the 242 Californiacities with an indexed median, Fresno ranks #242from highest to lowest. Across all 678 state ZIP profiles, available estimates run from 3.3to 728.5 PPM.

The 3.3–19 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

Soft21 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

21 of 21 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
53.2 miles
Profiles with evidence
21/21

Confidence labels

High: 0Moderate: 0Low: 21

Observation window: Jan 12, 2016 to Mar 11, 2026.

ZIP directory

Water reports in Fresno

Open a ZIP for site-level provenance and measurements.

ZIP code

93650

Soft

3.3 PPM

Nearest site
49.3 mi
Confidence
Low

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ZIP code

93701

Soft

4.2 PPM

Nearest site
55.3 mi
Confidence
Low

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ZIP code

93702

Soft

4.2 PPM

Nearest site
55.7 mi
Confidence
Low

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ZIP code

93703

Soft

3.5 PPM

Nearest site
53.8 mi
Confidence
Low

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ZIP code

93704

Soft

3.4 PPM

Nearest site
52 mi
Confidence
Low

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ZIP code

93705

Soft

3.6 PPM

Nearest site
53.2 mi
Confidence
Low

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ZIP code

93706

Soft

19 PPM

Nearest site
63.2 mi
Confidence
Low

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ZIP code

93710

Soft

3.4 PPM

Nearest site
50 mi
Confidence
Low

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ZIP code

93711

Soft

3.3 PPM

Nearest site
49.9 mi
Confidence
Low

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ZIP code

93720

Soft

3.9 PPM

Nearest site
47.4 mi
Confidence
Low

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ZIP code

93721

Soft

3.9 PPM

Nearest site
56.4 mi
Confidence
Low

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ZIP code

93722

Soft

3.7 PPM

Nearest site
53 mi
Confidence
Low

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ZIP code

93723

Soft

4.7 PPM

Nearest site
54.6 mi
Confidence
Low

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ZIP code

93725

Soft

14.7 PPM

Nearest site
57.1 mi
Confidence
Low

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ZIP code

93726

Soft

3.4 PPM

Nearest site
52 mi
Confidence
Low

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ZIP code

93727

Soft

3.6 PPM

Nearest site
54.5 mi
Confidence
Low

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ZIP code

93728

Soft

4.2 PPM

Nearest site
55.1 mi
Confidence
Low

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ZIP code

93730

Soft

4.7 PPM

Nearest site
44.3 mi
Confidence
Low

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ZIP code

93737

Soft

3.5 PPM

Nearest site
53.2 mi
Confidence
Low

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ZIP code

93740

Soft

3.4 PPM

Nearest site
50.4 mi
Confidence
Low

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ZIP code

93741

Soft

3.9 PPM

Nearest site
54.2 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Fresno

PWSID CA1010007

Surface water
System population served
545,716
Last reported
Jun 22, 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.

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 Fresno

Is the water hard?

The indexed city median is 4 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.