Is tap water safe in Trotwood?

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 Trotwood, OH?

Nearby USGS observations produce an estimate of 336 ppm (19.6 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 45426?

At 336 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

Trotwood water quality

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

Median indexed hardness

335PPM

2 indexed ZIPs

Range 333.5–336 PPM

State comparison: 109 PPM above
State hardness rank: #31 of 119
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Trotwood has 2 published ZIP profiles across Montgomery County. The indexed median is 335 PPM, compared with 226 PPM across Ohio.

Among the 119 Ohiocities with an indexed median, Trotwood ranks #31from highest to lowest. Across all 162 state ZIP profiles, available estimates run from 77.2to 387 PPM.

The 333.5–336 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

Hard0 ZIPs

Very hard2 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: 8.3 miles
Profiles with evidence: 2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Aug 27, 2018 to Dec 4, 2024.

ZIP directory

Water reports in Trotwood

Open a ZIP for site-level provenance and measurements.

ZIP code

45416

Very Hard

333.5 PPM

Nearest site: 5.6 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

45426

Very Hard

336 PPM

Nearest site: 8.3 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Trotwood City Pws

PWSID OH5702403

Surface water

System population served: 9,000
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	OH5702403	Jan 6, 2026	Unaddressed
LEAD AND COPPER RULE REVISIONS	OH5702403	Jul 2, 2025	Resolved
Consumer Confidence Rule	OH5702403	Dec 20, 2024	Unaddressed
Consumer Confidence Rule	OH5702403	Nov 15, 2021	Resolved
Consumer Confidence Rule	OH5702403	Oct 21, 2020	Unaddressed
Consumer Confidence Rule	OH5702403	Feb 5, 2020	Unaddressed
Consumer Confidence Rule	OH5702403	Nov 29, 2018	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

Miamisburg

Montgomery County

364 PPM median

Oakwood

Montgomery County

365 PPM median

Bryan

Williams County

335 PPM median

Greenville

Darke County

335 PPM median

Search all 119 Ohio cities →

Questions people ask

About water in Trotwood

Is the water hard?

The indexed city median is 335 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.