Columbia, SC Tap Water Quality

Tap water in Columbia, SC ranks among the best in the state, maintaining a remarkable average water quality score of 88/100 across its 34 ZIP codes. Based on recent EPA Safe Drinking Water Act compliance records, water provided by Columbia City of (sc4010001) and other municipal suppliers has consistently met or exceeded federal safety standards. This top-tier "A" grade reflects strong infrastructure, diligent monitoring by South Carolina Department of Health and Environmental Control, and low contaminant levels.

The accumulation of 68 health-based violations over the past 5 years highlights systemic challenges within Columbia's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by South Carolina Department of Health and Environmental Control. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 8 out of 34 ZIP codes in Columbia are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.