Public water system record
City of Columbia Utilities
Serves Columbia, Boone County, MO · 126,254 people served
Federal records show no health-based violations and 3 monitoring/reporting issues for City of Columbia Utilities in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- City of Columbia Utilities draws water from 24 wells (6 of them for emergency, seasonal or other part-time use).
- Record on file since 2007, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 1 lead and 2,624 unknown out of 50,925 service lines.
Check whether City of Columbia Utilities serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2025 | Active |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
Full record since 2007
EPA's records for City of Columbia Utilities go back to 2007. Before October 19, 2016 they list 3 health-based violations (3 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 3 | 0 |
| 2020s | 0 | 3 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2008, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 89.18 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Apr 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 85.98 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Jan 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82.3 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Oct 1, 2007 | Resolved |
Where the water comes from
City of Columbia Utilities draws water from 24 wells (6 of them for emergency, seasonal or other part-time use). It also has an emergency connection to Boone County PWSD 9. 3 other public water systems have emergency connections to City of Columbia Utilities.
Emergency or part-time connections to
- Boone County PWSD 9 Columbia, MO
Annual water quality report
City of Columbia Utilities must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Missouri.
Certified drinking water labs by state EPA guidance for private wells