F0/100
UNION PWS — Water Quality Report 2026
Serving 12,348 people · Missouri
Water Source
Groundwater
County
—
System ID
MO6010801
Violations
24
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
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 1, 2025 – February 28, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – December 6, 2021Enforcement: 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 UNION PWS
Is UNION PWS water safe to drink?
UNION PWS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 24 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has UNION PWS detected?
31 contaminants were tested in UNION PWS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does UNION PWS have any EPA violations?
Yes, UNION PWS has 24 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, Other, MCL. 19 are health-based violations.
How many people does UNION PWS serve?
UNION PWS serves approximately 12,348 people, Missouri. The system provides water to 1 community: Union.
What type of water does UNION PWS provide?
UNION PWS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO6010801.
How does UNION PWS compare to other utilities in Missouri?
UNION PWS scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Missouri state page for a full comparison of water systems.