A92/100
TUD - COLUMBIA WATER SYSTEM — Water Quality Report 2026
Serving 5,463 people · California
Water Source
Surface Water
County
—
System ID
CA5510013
Violations
1
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
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 TUD - COLUMBIA WATER SYSTEM
Is TUD - COLUMBIA WATER SYSTEM water safe to drink?
TUD - COLUMBIA WATER SYSTEM water receives a grade of A (92/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has TUD - COLUMBIA WATER SYSTEM detected?
31 contaminants were tested in TUD - COLUMBIA WATER SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does TUD - COLUMBIA WATER SYSTEM have any EPA violations?
Yes, TUD - COLUMBIA WATER SYSTEM has 1 EPA violation(s) on record, with the most recent in 2007. Violation types include TT. 1 are health-based violations.
How many people does TUD - COLUMBIA WATER SYSTEM serve?
TUD - COLUMBIA WATER SYSTEM serves approximately 5,463 people, California.
What type of water does TUD - COLUMBIA WATER SYSTEM provide?
TUD - COLUMBIA WATER SYSTEM 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 CA5510013.
How does TUD - COLUMBIA WATER SYSTEM compare to other utilities in California?
TUD - COLUMBIA WATER SYSTEM scores 92/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.