Is tap water safe in Miamisburg?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Miamisburg, OH?

Nearby USGS observations produce an estimate of 364 ppm (21.3 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 45342?

At 364 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Miamisburg water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Miamisburg, Ohio.

Median indexed hardness

364PPM

One indexed ZIP

Range 364–364 PPM

State comparison: 138 PPM above
State hardness rank: #19 of 119
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Miamisburg has 1 published ZIP profile across Montgomery County. The indexed median is 364 PPM, compared with 226 PPM across Ohio.

Among the 119 Ohiocities with an indexed median, Miamisburg ranks #19from highest to lowest. Across all 162 state ZIP profiles, available estimates run from 77.2to 387 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 3.5 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jun 2, 2016 to Sep 10, 2025.

ZIP directory

Water reports in Miamisburg

Open a ZIP for site-level provenance and measurements.

ZIP code

45342

Very Hard

364 PPM

Nearest site: 3.5 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Miamisburg City Pws

PWSID OH5701212

Groundwater

System population served: 19,790
Last reported: May 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.

Record	System	Period	Status
Consumer Confidence Rule	OH5701212	Nov 13, 2025	Unaddressed
Consumer Confidence Rule	OH5701212	Dec 18, 2024	Resolved
Consumer Confidence Rule	OH5701212	Jan 21, 2020	Unaddressed

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Ohio communities

Brookville

Montgomery County

336 PPM median

Germantown

Montgomery County

365 PPM median

Oakwood

Montgomery County

365 PPM median

Trotwood

Montgomery County

335 PPM median

Trenton

Butler County

364 PPM median

Loveland

Clermont County

365 PPM median

Search all 119 Ohio cities →

Questions people ask

About water in Miamisburg

Is the water hard?

The indexed city median is 364 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.