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Safety Grade
We compute an overall water quality grade based on violations and health risks, not just legal compliance.
Health Context
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Violation History
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Recommendations
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About this data: ClearWater uses the EPA's Safe Drinking Water Information System (SDWIS). Data is for public water systems only; private wells are not included. Legal limits (MCLs) are minimum standards; some contaminants may still pose health risks below legal thresholds.
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Water systems near
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MARION MUNICIPAL WATER DEPT
MARION, IA · 41,623 people served · Groundwater
Data last updated: 2026-07-10
0 total violations on record. No currently active health-based violations.
Lead & Copper
EPA has no lead or copper 90th-percentile results on record for this system.
Lithium
Highest reported detection: 182 µg/L. EPA's non-regulatory Health Reference Level is 10 µg/L. This system's highest detection is above that reference level.
Lithium has no federal drinking water limit. The Health Reference Level is a non-regulatory screening value from EPA's CCL 5 process, not an enforceable standard, and a result above it is not a violation. The figure shown is the highest single detection reported for this system; EPA compares averages, not maxima, when it reports national statistics. Source: EPA UCMR 5 occurrence data, reference values from EPA's UCMR 5 Data Summary (January 2026), Table 2.
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MARION MUNICIPAL WATER DEPT: Frequently Asked Questions
Is MARION MUNICIPAL WATER DEPT water safe to drink?
MARION MUNICIPAL WATER DEPT currently has no active health-based violations and has met all EPA standards in recent years. While this indicates good water quality compliance, you may still want to consider filtering your water, especially if your home has older plumbing that may contain lead.
What violations has MARION MUNICIPAL WATER DEPT had?
MARION MUNICIPAL WATER DEPT has 0 total violations on record, but none are currently active health-based violations.
Does MARION MUNICIPAL WATER DEPT water have lead?
Lead in drinking water typically comes from household plumbing, not from MARION MUNICIPAL WATER DEPT's treatment plant. See the Lead & Copper section on this page for the most recent 90th-percentile lead test results. If your home was built before 1986, consider running cold water for 30 seconds before drinking and using an NSF/ANSI 53-certified filter.
Related water quality pages
Lead & Copper
What To Do
Violations
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