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City water profile

Pittsburgh water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Pittsburgh, Pennsylvania.

Median indexed hardness

123PPM

24 indexed ZIPs

Range 121–127 PPM

State comparison
39 PPM above
State hardness rank
#11 of 50
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Pittsburgh has 24 published ZIP profiles across Allegheny County. The indexed median is 123 PPM, compared with 84 PPM across Pennsylvania.

Among the 50 Pennsylvaniacities with an indexed median, Pittsburgh ranks #11from highest to lowest. Across all 139 state ZIP profiles, available estimates run from 43to 166.5 PPM.

The 121–127 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
Hard24 ZIPs
Very hard0 ZIPs

24 of 24 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
7.5 miles
Profiles with evidence
24/24

Confidence labels

High: 0Moderate: 24Low: 0

Observation window: Jan 19, 2016 to Sep 30, 2025.

ZIP directory

Water reports in Pittsburgh

Open a ZIP for site-level provenance and measurements.

ZIP code

15201

Hard

121 PPM

Nearest site
5.9 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

15203

Hard

123 PPM

Nearest site
6.6 mi
Confidence
Moderate

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ZIP code

15204

Hard

123 PPM

Nearest site
7.7 mi
Confidence
Moderate

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ZIP code

15205

Hard

127 PPM

Nearest site
5.8 mi
Confidence
Moderate

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ZIP code

15206

Hard

121 PPM

Nearest site
5.2 mi
Confidence
Moderate

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ZIP code

15207

Hard

123 PPM

Nearest site
4.1 mi
Confidence
Moderate

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ZIP code

15208

Hard

121 PPM

Nearest site
4.8 mi
Confidence
Moderate

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ZIP code

15210

Hard

124 PPM

Nearest site
6.8 mi
Confidence
Moderate

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ZIP code

15211

Hard

125 PPM

Nearest site
8.7 mi
Confidence
Moderate

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ZIP code

15212

Hard

124 PPM

Nearest site
8.5 mi
Confidence
Moderate

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ZIP code

15213

Hard

121 PPM

Nearest site
6.4 mi
Confidence
Moderate

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ZIP code

15214

Hard

123 PPM

Nearest site
9.3 mi
Confidence
Moderate

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ZIP code

15216

Hard

126 PPM

Nearest site
9.3 mi
Confidence
Moderate

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ZIP code

15217

Hard

121 PPM

Nearest site
4.3 mi
Confidence
Moderate

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ZIP code

15219

Hard

123 PPM

Nearest site
7.5 mi
Confidence
Moderate

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ZIP code

15220

Hard

126 PPM

Nearest site
9 mi
Confidence
Moderate

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ZIP code

15222

Hard

123 PPM

Nearest site
8.1 mi
Confidence
Moderate

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ZIP code

15224

Hard

121 PPM

Nearest site
6.7 mi
Confidence
Moderate

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ZIP code

15226

Hard

126 PPM

Nearest site
8.2 mi
Confidence
Moderate

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ZIP code

15232

Hard

121 PPM

Nearest site
5.7 mi
Confidence
Moderate

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ZIP code

15233

Hard

124 PPM

Nearest site
9.2 mi
Confidence
Moderate

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ZIP code

15260

Hard

121 PPM

Nearest site
6.2 mi
Confidence
Moderate

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ZIP code

15282

Hard

123 PPM

Nearest site
7.6 mi
Confidence
Moderate

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ZIP code

15290

Hard

124 PPM

Nearest site
9.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Pittsburgh Water & Sewer Auth

PWSID PA5020038

Surface water
System population served
520,000
Last reported
Jun 15, 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
Total Haloacetic Acids (HAA5)PA5020038Jul 1, 2025Resolved
TTHMPA5020038Jul 1, 2025Resolved
Interim Enhanced Surface Water Treatment RulePA5020038Jan 1, 2025Resolved
MethoxychlorPA5020038Jan 1, 2023Resolved
ToxaphenePA5020038Jan 1, 2023Resolved
EndothallPA5020038Jan 1, 2023Resolved
GlyphosatePA5020038Jan 1, 2023Resolved
PicloramPA5020038Jan 1, 2023Resolved
DinosebPA5020038Jan 1, 2023Resolved
CarbofuranPA5020038Jan 1, 2023Resolved

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 Pittsburgh

Is the water hard?

The indexed city median is 123 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.