Is tap water safe in Toledo?

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 Toledo, OH?

Nearby USGS observations produce an estimate of 228 ppm (13.3 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 43604?

At 228 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

Toledo water quality

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

Median indexed hardness

228PPM

14 indexed ZIPs

Range 226–228 PPM

State comparison: 2 PPM above
State hardness rank: #53 of 119
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Toledo has 14 published ZIP profiles across Lucas County. The indexed median is 228 PPM, compared with 226 PPM across Ohio.

Among the 119 Ohiocities with an indexed median, Toledo ranks #53from highest to lowest. Across all 162 state ZIP profiles, available estimates run from 77.2to 387 PPM.

The 226–228 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 hard14 ZIPs

14 of 14 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 14.4 miles
Profiles with evidence: 14/14

Confidence labels

High: 0Moderate: 14Low: 0

Observation window: Jan 7, 2016 to Jun 9, 2026.

ZIP directory

Water reports in Toledo

Open a ZIP for site-level provenance and measurements.

ZIP code

43604

Very Hard

228 PPM

Nearest site: 13.8 mi
Confidence: Moderate

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ZIP code

43605

Very Hard

226 PPM

Nearest site: 14.8 mi
Confidence: Moderate

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ZIP code

43606

Very Hard

228 PPM

Nearest site: 13.1 mi
Confidence: Moderate

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ZIP code

43607

Very Hard

228 PPM

Nearest site: 11.7 mi
Confidence: Moderate

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ZIP code

43608

Very Hard

228 PPM

Nearest site: 15.6 mi
Confidence: Moderate

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ZIP code

43609

Very Hard

228 PPM

Nearest site: 11.2 mi
Confidence: Moderate

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ZIP code

43610

Very Hard

228 PPM

Nearest site: 14.6 mi
Confidence: Moderate

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ZIP code

43611

Very Hard

226 PPM

Nearest site: 18.3 mi
Confidence: Moderate

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ZIP code

43612

Very Hard

228 PPM

Nearest site: 17.1 mi
Confidence: Moderate

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ZIP code

43613

Very Hard

228 PPM

Nearest site: 15.3 mi
Confidence: Moderate

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ZIP code

43614

Very Hard

226 PPM

Nearest site: 8.5 mi
Confidence: Moderate

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ZIP code

43615

Very Hard

228 PPM

Nearest site: 10.6 mi
Confidence: Moderate

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ZIP code

43620

Very Hard

228 PPM

Nearest site: 14 mi
Confidence: Moderate

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ZIP code

43623

Very Hard

228 PPM

Nearest site: 14.4 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Toledo City Of

PWSID OH4801411

Surface water

System population served: 360,000
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
LEAD AND COPPER RULE REVISIONS	OH4801411	Jul 2, 2025	Resolved
Consumer Confidence Rule	OH4801411	Jan 25, 2024	Resolved
Interim Enhanced Surface Water Treatment Rule	OH4801411	Mar 1, 2023	Resolved · health-based
Total Haloacetic Acids (HAA5)	OH4801411	Jan 1, 2022	Resolved

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

Maumee

Lucas County

226 PPM median

Oregon

Lucas County

226 PPM median

Sylvania

Lucas County

234 PPM median

Waterville

Lucas County

226 PPM median

Newark

Licking County

228 PPM median

Upper Sandusky

Wyandot County

228 PPM median

Search all 119 Ohio cities →

Questions people ask

About water in Toledo

Is the water hard?

The indexed city median is 228 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.