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City water profile

Meridian water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Meridian, Idaho.

Median indexed hardness

118PPM

2 indexed ZIPs

Range 118–118 PPM

State comparison
50 PPM below
State hardness rank
#47 of 67
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Meridian has 2 published ZIP profiles across Ada County. The indexed median is 118 PPM, compared with 168 PPM across Idaho.

Among the 67 Idahocities with an indexed median, Meridian ranks #47from highest to lowest. Across all 78 state ZIP profiles, available estimates run from 22.2to 339 PPM.

The 118–118 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard2 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
19.3 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Oct 30, 2017 to Nov 3, 2022.

ZIP directory

Water reports in Meridian

Open a ZIP for site-level provenance and measurements.

ZIP code

83642

Moderately Hard

118 PPM

Nearest site
19.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

83646

Moderately Hard

118 PPM

Nearest site
13.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Meridian Water Dept

PWSID ID4010097

Groundwater
System population served
147,340
Last reported
Jun 26, 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 Meridian

Is the water hard?

The indexed city median is 118 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.