F0/100
HANNIBAL PWS — Water Quality Report 2026
Serving 17,108 people · Missouri
Water Source
Surface Water
County
—
System ID
MO2010344
Violations
66
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 1000.00 µg/L | — | Above Goal |
1,4-dioxane | 0.400 µg/L | — | Above Goal |
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
1
Health-Related
TIER 1 — URGENTUnresolved
Maximum Contaminant Level Violation
When: August 1, 2023 – August 31, 2023Rule: Total Coliform RuleEnforcement: Resolving — corrective action underwayVerify on EPA.gov
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 HANNIBAL PWS
Is HANNIBAL PWS water safe to drink?
HANNIBAL PWS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 66 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has HANNIBAL PWS detected?
69 contaminants were tested in HANNIBAL PWS's water. Notable contaminants include Lead (90th percentile), chlorate, 1,4-dioxane. No contaminants exceed EPA legal limits. 3 exceed EPA health goals (MCLGs).
Does HANNIBAL PWS have any EPA violations?
Yes, HANNIBAL PWS has 66 EPA violation(s) on record, with the most recent in 2023. Violation types include MCL, MON, Other. 25 are health-based violations.
How many people does HANNIBAL PWS serve?
HANNIBAL PWS serves approximately 17,108 people, Missouri. The system provides water to 1 community: Hannibal.
What type of water does HANNIBAL PWS provide?
HANNIBAL PWS 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 MO2010344.
How does HANNIBAL PWS compare to other utilities in Missouri?
HANNIBAL 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.