City water profile

Water hardness in Mount Vernon

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

Utility-reported hardness

Not yet available

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State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 2
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 →

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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.

Mount Vernon Pws

MO5010553 · Groundwater · 4,575 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: 0.0028 mg/L
Action level: 0.015 mg/L

19% of the listed benchmark

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

Violation history (2)

Imported violation history for Mount Vernon Pws
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Unaddressed	Jul 2, 2025
Lead and Copper Rule	Resolved	Oct 1, 2024 to Jan 14, 2026

Jamestowne Mhp

MO5048294 · Groundwater · 46 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: 0.0051 mg/L
Action level: 0.015 mg/L

34% of the listed benchmark

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

Violation history (36)

Imported violation history for Jamestowne Mhp
Rule	Status	Period
Groundwater Rule	Resolved	Aug 1, 2025 to Aug 31, 2025
Consumer Confidence Rule	Unaddressed	Jul 1, 2025
Groundwater Rule	Resolved	Apr 1, 2025 to Apr 30, 2025
Groundwater Rule	Resolved	Dec 1, 2024 to Dec 31, 2024
LEAD AND COPPER RULE REVISIONS	Unaddressed	Oct 17, 2024
Groundwater Rule	Resolved	Oct 1, 2024 to Oct 31, 2024
Lead and Copper Rule	Unaddressed	Oct 1, 2024
Public Notice	Resolved	Sep 30, 2024 to Jan 29, 2025
Public Notice	Resolved	Sep 30, 2024 to Jan 29, 2025
Public Notice	Resolved	Aug 4, 2024 to Jan 29, 2025
Public Notice	Resolved	Aug 4, 2024 to Jan 29, 2025
Groundwater Rule	Resolved	Aug 1, 2024 to Aug 31, 2024
Public Notice	Resolved	Jul 2, 2024 to Jan 29, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2024 to Sep 30, 2024
Groundwater RuleHealth-based	Resolved	Jul 1, 2024 to Jul 31, 2024
Public Notice	Resolved	Jun 30, 2024 to Jan 29, 2025
Groundwater Rule	Resolved	Jun 1, 2024 to Jun 30, 2024
Groundwater RuleHealth-based	Resolved	May 1, 2024 to May 31, 2024
Public Notice	Resolved	Apr 26, 2024 to Jan 29, 2025
Public Notice	Resolved	Apr 15, 2024 to Jan 29, 2025
Public Notice	Resolved	Apr 15, 2024 to Jan 29, 2025
Public Notice	Resolved	Apr 15, 2024 to Jan 29, 2025
Groundwater RuleHealth-based	Resolved	Apr 1, 2024 to Apr 30, 2024
Groundwater Rule	Resolved	Feb 1, 2024 to Feb 29, 2024
Groundwater Rule	Resolved	Jan 1, 2024 to Jan 31, 2024
Groundwater Rule	Resolved	Dec 1, 2023 to Dec 31, 2023
Lead and Copper Rule	Resolved	Oct 1, 2023 to Oct 22, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2023 to Nov 1, 2023
Groundwater Rule	Resolved	Mar 1, 2023 to Mar 31, 2023
Public Notice	Resolved	Sep 5, 2022 to Oct 27, 2022
Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based	Resolved	Jul 26, 2022 to Nov 18, 2022
Revised Total Coliform Rule	Resolved	May 1, 2022 to May 31, 2022
E. COLI	Resolved	May 1, 2022 to Sep 27, 2022
Nitrate-Nitrite	Resolved	Jan 1, 2022 to Dec 31, 2022
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Sep 29, 2022
Revised Total Coliform RuleHealth-based	Resolved	Apr 1, 2021 to Apr 30, 2021

City summary

What the indexed records say

Mount Vernon has 1 published ZIP profile across Lawrence County. The regional-evidence median is 215 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: 4.3 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jun 14, 2016 to Jul 12, 2017.

ZIP directory

Water reports in Mount Vernon

Open a ZIP for site-level provenance and measurements.

ZIP code

65712

Very Hard

215 PPM

Nearest site: 4.3 mi
Confidence: Low

View full ZIP evidence →

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

Continue comparing

Other Missouri communities

Freistatt

Lawrence County

182 PPM median

Halltown

Lawrence County

243 PPM median

Marionville

Lawrence County

215 PPM median

Miller

Lawrence County

213 PPM median

Rolla

Phelps County

216 PPM median

Birch Tree

Shannon County

216 PPM median

Search all 504 Missouri cities →

Questions people ask

About water in Mount Vernon

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.