C42/100
ST JOHN, CITY OF — Water Quality Report 2026
Serving 1,176 people · Kansas
Water Source
Groundwater
County
—
System ID
KS2018502
Violations
23
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
3
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.
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.
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 31, 2022 – May 9, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: June 13, 2021 – June 16, 2021Rule: 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 ST JOHN, CITY OF
Is ST JOHN, CITY OF water safe to drink?
ST JOHN, CITY OF water receives a grade of C (42/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 23 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ST JOHN, CITY OF detected?
1 contaminants were tested in ST JOHN, CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ST JOHN, CITY OF have any EPA violations?
Yes, ST JOHN, CITY OF has 23 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MCL. 8 are health-based violations.
How many people does ST JOHN, CITY OF serve?
ST JOHN, CITY OF serves approximately 1,176 people, Kansas. The system provides water to 1 community: St John.
What type of water does ST JOHN, CITY OF provide?
ST JOHN, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is KS2018502.
How does ST JOHN, CITY OF compare to other utilities in Kansas?
ST JOHN, CITY OF scores 42/100 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.