A90/100
JOHNSON COUNTY PWSD 1 — Water Quality Report 2026
Serving 3,730 people · Missouri
Water Source
Groundwater
County
—
System ID
MO1024309
Violations
2
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.67 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Violation related to Consumer Confidence Report
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: Consumer Confidence 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 JOHNSON COUNTY PWSD 1
Is JOHNSON COUNTY PWSD 1 water safe to drink?
JOHNSON COUNTY PWSD 1 water receives a grade of A (90/100), which is considered excellent. Out of 32 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has JOHNSON COUNTY PWSD 1 detected?
32 contaminants were tested in JOHNSON COUNTY PWSD 1's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does JOHNSON COUNTY PWSD 1 have any EPA violations?
Yes, JOHNSON COUNTY PWSD 1 has 2 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other.
How many people does JOHNSON COUNTY PWSD 1 serve?
JOHNSON COUNTY PWSD 1 serves approximately 3,730 people, Missouri. The system provides water to 1 community: Warrensburg.
What type of water does JOHNSON COUNTY PWSD 1 provide?
JOHNSON COUNTY PWSD 1 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO1024309.
How does JOHNSON COUNTY PWSD 1 compare to other utilities in Missouri?
JOHNSON COUNTY PWSD 1 scores 90/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Missouri state page for a full comparison of water systems.