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City water profile

Water hardness in Maryville

Find official utility reports, understand hardness, and check the water system serving your home in Maryville, Missouri.

Utility-reported hardness

Not yet available

Check your provider and source →
State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
3
Active health records
0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →
Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Maryville Pws

MO1010508 · Surface water · 10,775 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (2)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.0061 mg/L
Action level
0.015 mg/L

40% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Chlorite

EPA SDWIS reported health-based violation

Reported violation
Reported level
1.1 MG/L
Maximum contaminant level
1 MG/L

110% of the listed benchmark

Monitoring period: Mar 1, 2024 to Mar 31, 2024

Violation history (13)
Imported violation history for Maryville Pws
RuleStatusPeriod
Public NoticeResolvedFeb 26, 2026 to Feb 27, 2026
Interim Enhanced Surface Water Treatment RuleHealth-basedArchivedDec 1, 2025 to Dec 31, 2025
Public NoticeResolvedApr 22, 2024 to Apr 26, 2024
Public NoticeResolvedApr 22, 2024 to Apr 26, 2024
ChloriteHealth-basedResolvedMar 1, 2024 to Mar 31, 2024
ChloriteResolvedMar 1, 2024 to Mar 31, 2024
ChloriteHealth-basedResolvedFeb 1, 2024 to Feb 29, 2024
ChloriteResolvedFeb 1, 2024 to Feb 29, 2024
Chlorine dioxideResolvedFeb 1, 2024 to Feb 29, 2024
ChloriteResolvedNov 1, 2023 to Nov 30, 2023
Public NoticeResolvedMar 6, 2023 to Apr 25, 2023
Long Term 2 Enhanced Surface Water Treatment RuleHealth-basedResolvedDec 27, 2022 to Feb 14, 2023
Groundwater RuleResolvedAug 27, 2022 to Nov 8, 2022

Nodaway County Pwsd 1

MO1024428 · Surface water · 6,428 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.0014 mg/L
Action level
0.015 mg/L

9% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Great Northwest Wholesale Water Commiss

MO1071603 · Groundwater · 25 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (0)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

City summary

What the indexed records say

Maryville has 1 published ZIP profile across Nodaway County. The regional-evidence median is 192 PPM. The city does not meet the stricter comparison standard.

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. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

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: 0Low: 1

Observation window: Jun 4, 2024 to Jun 4, 2024.

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
Low

View full ZIP evidence →

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. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Maryville

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

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.