F1/100
COLUMBIA CITY OF (SC4010001) — Water Quality Report 2026
Serving 319,500 people · South Carolina
Water Source
Surface Water
County
—
System ID
SC4010001
Violations
22
Contaminant Test Results
5 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.009 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.007 µg/L | 0.004 µg/L | Over Limit |
chlorate | 300.00 µg/L | — | Above Goal |
1,4-dioxane | 0.470 µg/L | — | Above Goal |
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
1
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: December 1, 2024 – December 31, 2024Rule: Stage 1 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About COLUMBIA CITY OF (SC4010001)
Is COLUMBIA CITY OF (SC4010001) water safe to drink?
COLUMBIA CITY OF (SC4010001) water receives a grade of F (1/100), which is considered failing. 2 contaminant(s) exceed EPA legal limits and 22 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLUMBIA CITY OF (SC4010001) detected?
76 contaminants were tested in COLUMBIA CITY OF (SC4010001)'s water. Notable contaminants include PFOS, PFOA, Lead (90th percentile), chlorate, 1,4-dioxane. 2 exceed EPA legal limits (MCLs). 5 exceed EPA health goals (MCLGs).
Does COLUMBIA CITY OF (SC4010001) have any EPA violations?
Yes, COLUMBIA CITY OF (SC4010001) has 22 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, MR, TT. 13 are health-based violations.
How many people does COLUMBIA CITY OF (SC4010001) serve?
COLUMBIA CITY OF (SC4010001) serves approximately 319,500 people, South Carolina. The system provides water to 1 community: Columbia.
What type of water does COLUMBIA CITY OF (SC4010001) provide?
COLUMBIA CITY OF (SC4010001) sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is SC4010001.
How does COLUMBIA CITY OF (SC4010001) compare to other utilities in South Carolina?
COLUMBIA CITY OF (SC4010001) scores 1/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our South Carolina state page for a full comparison of water systems.