Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03

Tracked under the EPA Safe Drinking Water program, Union, MS shows 2 water violations on file — findings that span multiple violation categories and are detailed system by system in the data grid further down the page.

Water Quality by ZIP Code in Union

Water quality varies across Union's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.

ZIP Code	Grade	Score	Violations	Health
39365	A	95	2	0	View report →

Water Quality Overview

Union, Mississippi receives a water quality grade of A with an overall score of 95 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).

The 1 water system serving Union have accumulated 2 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 3,432 people.

What Grade A Means

A grade of A indicates excellent compliance with EPA drinking water standards. Union's water systems have maintained strong performance in both contaminant monitoring and regulatory compliance.

Lead Levels

The average 90th percentile lead level across Union water systems is 0.0008 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.

With 64% of homes built before 1986, Union has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.

Water Systems Serving Union

Union is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 3,432 people across 1 ZIP codes.

Each water system is identified by a Public Water System ID (PWSID) and is required to:

• Test for over 90 regulated contaminants on a regular schedule
• Report results to the EPA and state regulators
• Issue an annual Consumer Confidence Report (CCR) to all customers
• Take corrective action when violations occur

The EPA has taken 2 enforcement actions against water systems serving Union. Enforcement actions range from informal compliance assistance to formal orders and penalties.

How to Check Your Water in Union

1. Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores

2. Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants

3. Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel

4. Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics

5. Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts

Contaminants Detected in Union Water Systems

The following contaminants have been detected or caused violations across Union's water systems:

MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.

EPA Enforcement History

The EPA and state regulators have taken 2 enforcement actions against water systems serving Union. Recent actions:

Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-03-19.

Union vs. Nearby Mississippi Cities

How Union's water quality compares to similar cities in Mississippi:

Common Questions About Union Water

These are the most common questions residents search for about water quality in Union, Mississippi:

Is Union water hard or soft? Water hardness varies by source. Union's 1 water system uses a single source. Check your ZIP code report for specific hardness data.

Can I drink Union tap water? Union's water receives a grade of A (95/100). No health-based violations have been recorded, but home testing is always recommended.

What is the best water filter for Union? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.

Union vs. Mississippi Average

Understanding how Union compares to the broader Mississippi average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.

To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Union.

ZIP Codes in Union

Union spans 1 ZIP code. The ZIP with the lowest water quality score is 39365. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones
• Enforcement: EPA ECHO database
• Filter recommendations: NSF/ANSI certified products

Updated daily.

Your Water is Safe — Here's How to Keep It That Way

Grade A is excellent news. Here's what proactive homeowners do to maintain water quality:

Annual Water Testing

EPA recommends annual testing even with clean water. Home test kits: $20-$50. Catches changes before they become problems.

Maintenance Filtration

A basic carbon filter removes chlorine taste and catches emerging contaminants like PFAS that aren't yet fully regulated.

Plumbing Check

Even safe city water picks up lead from home pipes. If your home was built before 1986, a one-time pipe inspection is recommended.