CITY OF COLUMBIA: EPA violation history, explained
CITY OF COLUMBIA had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 5,900 people get their water from it, across 2,580 connections.
How this compares nationally
78 total violations and 2 health-based ones put CITY OF COLUMBIA at the 55th percentile nationally for violation burden, rank 5,816 of 12,903.
How CITY OF COLUMBIA compares within MS
MS's 349 covered systems average 3.2 health-based violations each; CITY OF COLUMBIA carries 2, not more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for CITY OF COLUMBIA is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/18/2026.
What kind of problem, specifically
CITY OF COLUMBIA's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is CITY OF COLUMBIA's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and CITY OF COLUMBIA's customers' taps is household plumbing, invisible to a system-level record ranked 5,816th of 12,903 by violation count. The guide to what this data misses covers that gap.