TapSafetyReport
C45/100

Maryville Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 17,203 residents · Missouri

What's In Maryville's Tap Water?

54
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.006 mg/L0.015 mg/LAbove Goal

EPA Violation History

11

Violations (last 5yr)

0

Unresolved

3

Health-Related

TIER 3Resolved

Disinfection byproduct treatment technique failure

When: April 22, 2024 – April 26, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: April 22, 2024 – April 26, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: March 1, 2024 – March 31, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: March 1, 2024 – March 31, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: February 1, 2024 – February 29, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: February 1, 2024 – February 29, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: February 1, 2024 – February 29, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: November 1, 2023 – November 30, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: March 6, 2023 – April 25, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved

Violation related to Lead and Copper Rule

When: December 27, 2022 – February 14, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Violation related to Consumer Confidence Report

When: August 27, 2022 – November 8, 2022Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Water Utility Details

MARYVILLE PWS
Population Served

10,775

Water Source

Surface Water

System ID

MO1010508

NODAWAY COUNTY PWSD 1
Population Served

6,428

Water Source

Purchased Surface Water

System ID

MO1024428

Frequently Asked Questions About Maryville Water

Is Maryville tap water safe to drink?

Maryville, Missouri tap water receives a grade of C (45/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 52 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.

What contaminants are in Maryville's water?

Of the 54 contaminants tested in Maryville's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does Maryville have any water quality violations?

Yes, Maryville has 52 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MCL, MR. 20 of these are health-based violations, which are the most serious category.

Do I need a water filter in Maryville?

Maryville water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.

Where does Maryville's tap water come from?

Maryville's drinking water is sourced from surface water and supplied by MARYVILLE PWS and 1 other water system(s). The system serves approximately 17,203 people. Surface water sources include rivers, lakes, and reservoirs.

How often is Maryville's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Maryville's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does Maryville's water compare to other cities in Missouri?

Maryville's water quality score of 45/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Missouri state page to see how all cities in the state compare.

What should I do if I'm concerned about Maryville's water quality?

If you have concerns about Maryville's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MARYVILLE PWS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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