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City water profile

Tacoma water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Tacoma, Washington.

Median indexed hardness

61PPM

13 indexed ZIPs

Range 61.3–61.3 PPM

State comparison
43 PPM below
State hardness rank
#109 of 133
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Tacoma has 13 published ZIP profiles across Pierce County. The indexed median is 61 PPM, compared with 104 PPM across Washington.

Among the 133 Washingtoncities with an indexed median, Tacoma ranks #109from highest to lowest. Across all 189 state ZIP profiles, available estimates run from 20.6to 238 PPM.

The 61.3–61.3 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 hard13 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

13 of 13 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
6.3 miles
Profiles with evidence
13/13

Confidence labels

High: 0Moderate: 0Low: 13

Observation window: Jan 13, 2016 to Mar 20, 2026.

ZIP directory

Water reports in Tacoma

Open a ZIP for site-level provenance and measurements.

ZIP code

98402

Moderately Hard

61.3 PPM

Nearest site
5.8 mi
Confidence
Low

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ZIP code

98403

Moderately Hard

61.3 PPM

Nearest site
6.9 mi
Confidence
Low

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ZIP code

98404

Moderately Hard

61.3 PPM

Nearest site
3.2 mi
Confidence
Low

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ZIP code

98405

Moderately Hard

61.3 PPM

Nearest site
6.7 mi
Confidence
Low

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ZIP code

98406

Moderately Hard

61.3 PPM

Nearest site
8.9 mi
Confidence
Low

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ZIP code

98407

Moderately Hard

61.3 PPM

Nearest site
10.2 mi
Confidence
Low

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ZIP code

98408

Moderately Hard

61.3 PPM

Nearest site
4.9 mi
Confidence
Low

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ZIP code

98409

Moderately Hard

61.3 PPM

Nearest site
6.2 mi
Confidence
Low

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ZIP code

98416

Moderately Hard

61.3 PPM

Nearest site
7.6 mi
Confidence
Low

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ZIP code

98418

Moderately Hard

61.3 PPM

Nearest site
5 mi
Confidence
Low

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ZIP code

98421

Moderately Hard

61.3 PPM

Nearest site
4.7 mi
Confidence
Low

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ZIP code

98422

Moderately Hard

61.3 PPM

Nearest site
6.3 mi
Confidence
Low

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ZIP code

98465

Moderately Hard

61.3 PPM

Nearest site
9.7 mi
Confidence
Low

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Public water systems

Utilities associated with this city

Tacoma Water Division City Of

PWSID WA5386800

Surface water
System population served
446,170
Last reported
Jun 19, 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 Tacoma

Is the water hard?

The indexed city median is 61 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.