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City water profile

Maryville water quality

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

Median indexed hardness

192PPM

One indexed ZIP

Range 192–192 PPM

State comparison
44 PPM below
State hardness rank
#398 of 504
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Maryville has 1 published ZIP profile across Nodaway County. The indexed median is 192 PPM, compared with 236 PPM across Missouri.

Among the 504 Missouricities with an indexed median, Maryville ranks #398from 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
13.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 27, 2016 to May 11, 2026.

ZIP directory

Water reports in Maryville

Open a ZIP for site-level provenance and measurements.

ZIP code

64468

Very Hard

192 PPM

Nearest site
13.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Maryville Pws

PWSID MO1010508

Surface water
System population served
10,775
Last reported
Jun 16, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Nodaway County Pwsd 1

PWSID MO1024428

Surface water
System population served
6,428
Last reported
Jun 16, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Great Northwest Wholesale Water Commiss

PWSID MO1071603

Groundwater
System population served
25
Last reported
Unavailable

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
Public NoticeMO1010508Feb 26, 2026Resolved
Interim Enhanced Surface Water Treatment RuleMO1010508Dec 1, 2025Archived · health-based
Public NoticeMO1010508Apr 22, 2024Resolved
Public NoticeMO1010508Apr 22, 2024Resolved
ChloriteMO1010508Mar 1, 2024Resolved · health-based
ChloriteMO1010508Mar 1, 2024Resolved
ChloriteMO1010508Feb 1, 2024Resolved · health-based
ChloriteMO1010508Feb 1, 2024Resolved
Chlorine dioxideMO1010508Feb 1, 2024Resolved
ChloriteMO1010508Nov 1, 2023Resolved

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 Maryville

Is the water hard?

The indexed city median is 192 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.