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D23/100

DERBY, CITY OF — Water Quality Report 2026

Serving 25,413 people · Kansas

Water Source
Purchased Surface Water
County
—
System ID
KS2017328
Violations
22

Contaminant Test Results

2 contaminants above EPA health goals
ContaminantDetectedLimit (MCL)Status
Copper (90th percentile)
1.41 mg/L1.30 mg/LOver Limit
Lead (90th percentile)
0.001 mg/L0.015 mg/LAbove Goal

EPA Violation History

5

Violations (last 5yr)

0

Unresolved

0

Health-Related

TIER 3Resolved

Disinfection byproduct treatment technique failure

When: October 6, 2022 – May 30, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2022 – August 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2022 – August 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2021 – August 31, 2021Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2021 – August 31, 2021Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway

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 DERBY, CITY OF

Is DERBY, CITY OF water safe to drink?

DERBY, CITY OF water receives a grade of D (23/100), which is considered poor. 1 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 DERBY, CITY OF detected?

70 contaminants were tested in DERBY, 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 DERBY, CITY OF have any EPA violations?

Yes, DERBY, CITY OF has 22 EPA violation(s) on record, with the most recent in 2022. Violation types include Other, MR, MCL. 11 are health-based violations.

How many people does DERBY, CITY OF serve?

DERBY, CITY OF serves approximately 25,413 people, Kansas. The system provides water to 1 community: Derby.

What type of water does DERBY, CITY OF provide?

DERBY, CITY OF sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is KS2017328.

How does DERBY, CITY OF compare to other utilities in Kansas?

DERBY, CITY OF scores 23/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Kansas state page for a full comparison of water systems.

Cities Served

Derby