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City water profile

Williamsville water quality

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

Median indexed hardness

216PPM

One indexed ZIP

Range 216–216 PPM

State comparison
20 PPM below
State hardness rank
#286 of 504
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Williamsville has 1 published ZIP profile across Wayne County. The indexed median is 216 PPM, compared with 236 PPM across Missouri.

Among the 504 Missouricities with an indexed median, Williamsville ranks #286from 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
14.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 1, 2016 to Jul 8, 2024.

ZIP directory

Water reports in Williamsville

Open a ZIP for site-level provenance and measurements.

ZIP code

63967

Very Hard

216 PPM

Nearest site
14.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Williamsville Pws

PWSID MO4010861

Groundwater
System population served
342
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.

RecordSystemPeriodStatus
Consumer Confidence RuleMO4010861Jul 1, 2023Resolved
Consumer Confidence RuleMO4010861Jul 1, 2021Resolved

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 Williamsville

Is the water hard?

The indexed city median is 216 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.