Is tap water safe in Winona?

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 Winona, MO?

Nearby USGS observations produce an estimate of 223.5 ppm (13.1 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 65588?

At 223.5 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

Winona water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Winona, Missouri.

Median indexed hardness

224PPM

One indexed ZIP

Range 223.5–223.5 PPM

State comparison: 12 PPM below
State hardness rank: #259 of 504
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Winona has 1 published ZIP profile across Shannon County. The indexed median is 224 PPM, compared with 236 PPM across Missouri.

Among the 504 Missouricities with an indexed median, Winona ranks #259from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 38.3to 483 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: 3.7 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 1, 2016 to Aug 23, 2023.

ZIP directory

Water reports in Winona

Open a ZIP for site-level provenance and measurements.

ZIP code

65588

Very Hard

223.5 PPM

Nearest site: 3.7 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Winona Pws

PWSID MO4010867

Groundwater

System population served: 1,315
Last reported: Jun 16, 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.

Record	System	Period	Status
LEAD AND COPPER RULE REVISIONS	MO4010867	Jul 2, 2025	Unaddressed
Lead and Copper Rule	MO4010867	Oct 1, 2024	Resolved
Consumer Confidence Rule	MO4010867	Jul 1, 2024	Resolved
Consumer Confidence Rule	MO4010867	Jul 1, 2023	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 Missouri communities

Birch Tree

Shannon County

231 PPM median

Bunker

Shannon County

222 PPM median

Eminence

Shannon County

222 PPM median

Centerville

Reynolds County

224 PPM median

Steelville

Crawford County

224 PPM median

Bolivar

Polk County

224 PPM median

Search all 504 Missouri cities →

Questions people ask

About water in Winona

Is the water hard?

The indexed city median is 224 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.