C59/100
OLATHE, CITY OF — Water Quality Report 2026
Serving 143,014 people · Kansas
Water Source
Surface Water
County
—
System ID
KS2009115
Violations
18
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.011 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
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: March 1, 2025 – March 31, 2025Rule: Stage 1 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: May 13, 2022 – June 21, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: May 13, 2022 – June 21, 2022Rule: Ground Water RuleEnforcement: 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 OLATHE, CITY OF
Is OLATHE, CITY OF water safe to drink?
OLATHE, CITY OF water receives a grade of C (59/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OLATHE, CITY OF detected?
76 contaminants were tested in OLATHE, CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does OLATHE, CITY OF have any EPA violations?
Yes, OLATHE, CITY OF has 18 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, TT. 5 are health-based violations.
How many people does OLATHE, CITY OF serve?
OLATHE, CITY OF serves approximately 143,014 people, Kansas. The system provides water to 1 community: Olathe.
What type of water does OLATHE, CITY OF provide?
OLATHE, CITY OF 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 KS2009115.
How does OLATHE, CITY OF compare to other utilities in Kansas?
OLATHE, CITY OF scores 59/100 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.