Water Quality in Columbia, SC: 20 Violations - Grade N/A

Data: EPA Safe Drinking Water Information System (SDWIS)

Water Quality Overview

Columbia, South Carolina has directly mapped EPA water-system data for 12 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.

The available EPA records report 20 violations, including 3 health-based violations across 12 directly mapped ZIP records with reported counts.

Lead Levels

The average 90th percentile lead level across Columbia water systems is 0.0050 mg/L - within EPA limits. No exceedances appear among the 12 ZIP records with known lead status.

With 53% of homes built before 1986, Columbia 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 Columbia

Columbia is served by 13 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 345,750 people across 34 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 120 enforcement actions against water systems serving Columbia. Enforcement actions range from informal compliance assistance to formal orders and penalties.

How to Check Your Water in Columbia

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

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 Columbia Water Systems

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

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

Violation Trend Over Time

Year-by-year EPA violations recorded for water systems serving Columbia:

Violations have increased from 12 in 2021 to 13 in 2024. This trend warrants monitoring.

EPA Enforcement History

The EPA and state regulators have taken 36 enforcement actions against water systems serving Columbia. Recent actions:

Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-03-23.

Columbia vs. Nearby South Carolina Cities

How Columbia's water quality compares to similar cities in South Carolina:

Recommended Water Filters for Columbia

Based on contaminants detected in Columbia's water supply, these filter types are recommended:

Granular Activated Carbon (GAC)

• Removes: Chlorite (Canal Plant)
• Effectiveness: 70-90%
• Cost range: $100–$600
• Certification: NSF/ANSI 42
• Recommended products:
  • Aquasana AQ-5200

Granular Activated Carbon (GAC, whole-house or under-sink)

• Removes: Chloramines
• Effectiveness: 95-99%
• Cost range: $100–$600
• Certification: NSF/ANSI 42
• Recommended products:
  • Aquasana AQ-5200
  • Waterdrop Chubby Pitcher
  • Berkey Travel

UV Disinfection System (POE or POU)

• Removes: Total Coliform Bacteria
• Effectiveness: 99.99%
• Cost range: $100–$700
• Certification: NSF/ANSI 55
• Recommended products:
  • Viqua VH200
  • HQUA UV System
  • Waterdrop G3P800

Water Quality by ZIP Code in Columbia

EPA coverage and recorded violations can differ across Columbia's ZIP codes. Missing counts are shown as unavailable, not zero:

Common Questions About Columbia Water

These are the most common questions residents search for about water quality in Columbia, South Carolina:

Is Columbia water hard or soft? Water hardness varies by source. Columbia's 13 water systems use multiple sources. Check your ZIP code report for specific hardness data.

Can I drink Columbia tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 3 health-based violations; check the affected utility record and consider certified testing.

What is the best water filter for Columbia? Based on detected contaminants, a granular activated carbon (gac) filter is most recommended. See our Water Filter Matcher for personalized recommendations.

Columbia vs. South Carolina Average

Understanding how Columbia compares to the broader South Carolina 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 Columbia.

ZIP Codes in Columbia

Columbia spans 34 ZIP codes. EPA water-system coverage is available for 12 directly mapped ZIP codes. 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

Source reporting periods vary. See each cited source for its publication schedule.