C56/100
COLBY, CITY OF — Water Quality Report 2026
Serving 5,516 people · Kansas
Water Source
Groundwater
County
—
System ID
KS2019302
Violations
33
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.73 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 COLBY, CITY OF
Is COLBY, CITY OF water safe to drink?
COLBY, CITY OF water receives a grade of C (56/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 33 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLBY, CITY OF detected?
32 contaminants were tested in COLBY, CITY OF's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does COLBY, CITY OF have any EPA violations?
Yes, COLBY, CITY OF has 33 EPA violation(s) on record, with the most recent in 2019. Violation types include Other, MR.
How many people does COLBY, CITY OF serve?
COLBY, CITY OF serves approximately 5,516 people, Kansas. The system provides water to 1 community: Colby.
What type of water does COLBY, CITY OF provide?
COLBY, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is KS2019302.
How does COLBY, CITY OF compare to other utilities in Kansas?
COLBY, CITY OF scores 56/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Kansas state page for a full comparison of water systems.