COLUMBIA CITY OF (SC4010001): EPA violation history, explained
COLUMBIA CITY OF (SC4010001) had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 354,068 people get their water from it, across 153,754 connections.
COLUMBIA CITY OF (SC4010001)'s record against the rest of the country
Out of 12,903 systems in this dataset, COLUMBIA CITY OF (SC4010001) ranks 1,484th by violation burden (89th percentile) - 23 violations total, 13 health-baseds.
Against the SC average
Among the 198 SC systems in this dataset, the average is 3.8 health-based violations - COLUMBIA CITY OF (SC4010001)'s 13 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
COLUMBIA CITY OF (SC4010001)'s most recent violation on record is dated 2024-01-12, with the most recent health-based one dated 2024-01-12. Last reported to EPA: 06/29/2026.
The concern categories on record
COLUMBIA CITY OF (SC4010001)'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:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Interim Enhanced Surface Water Treatment Rule; Revised Total Coliform Rule
- Disinfection byproducts - flagged from: Chlorite
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What COLUMBIA CITY OF (SC4010001)'s record does not cover
This is what COLUMBIA CITY OF (SC4010001) reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and COLUMBIA CITY OF (SC4010001)'s customers' taps is household plumbing, invisible to a system-level record ranked 1,484th of 12,903 by violation count. The guide to what this data misses covers that gap.