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City water profile

Troy water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Troy, Michigan.

Median indexed hardness

283PPM

4 indexed ZIPs

Range 283–283 PPM

State comparison
At state median
State hardness rank
#191 of 374
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Troy has 4 published ZIP profiles across Oakland County. The indexed median is 283 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Troy ranks #191from highest to lowest. Across all 512 state ZIP profiles, available estimates run from 41.3to 459.5 PPM.

The 283–283 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
Hard0 ZIPs
Very hard4 ZIPs

4 of 4 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
7.8 miles
Profiles with evidence
4/4

Confidence labels

High: 0Moderate: 0Low: 4

Observation window: Jan 26, 2016 to May 13, 2026.

ZIP directory

Water reports in Troy

Open a ZIP for site-level provenance and measurements.

ZIP code

48083

Very Hard

283 PPM

Nearest site
6.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

48084

Very Hard

283 PPM

Nearest site
8.4 mi
Confidence
Low

View full ZIP evidence →

ZIP code

48085

Very Hard

283 PPM

Nearest site
4.9 mi
Confidence
Low

View full ZIP evidence →

ZIP code

48098

Very Hard

283 PPM

Nearest site
7.8 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Troy

PWSID MI0006690

Surface water
System population served
85,854
Last reported
Jun 23, 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 Troy

Is the water hard?

The indexed city median is 283 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.