Is Maysville, MO Tap Water Safe to Drink?
Graded D, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
49/100
waterverge.com Maysville, MO — Water Quality Report
Maysville's drinking water received a grade of D (49 out of 100), indicating poor water quality. The city's 1 water system serves approximately 1,096 residents using surface water.
Lead levels were measured at 4.4 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 116 violations on record, including 100 health-based violations. 3 remain unresolved.
What to know about Maysville's water
Maysville ranks #466 out of 509 cities in Missouri for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Maysville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 21 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Maysville, MO water safe to drink?
Maysville's drinking water has significant quality concerns based on EPA testing data. With a grade of D (49/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,096 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Maysville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Maysville's water quality assessment. Grade: D (49/100).
Contaminants: Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule.
2 health-based. Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Lead and Copper Rule.
Federal disaster declaration (FEMA DR-3232). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-995). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Maysville's water supply.
Well within EPA limits.
Violation history
Maysville's water system has 116 total violations on record, including 100 health-based violations. 3 remain unresolved. 21 violations were issued in the last 5 years.
Flood & environmental risk
DeKalb County has experienced 5 federally declared disasters since 1965. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Maysville's water come from?
Maysville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 1,096 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Maysville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Maysville's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Maysville's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Flood & disaster history
DeKalb County has experienced 5 federally declared disasters since 1965. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 4.4 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Maysville compares by contaminant
Explore where Maysville ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Maysville's water comes from
Maysville's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 1,096 people through 1 water system.
Water systems serving Maysville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MAYSVILLE PWS | MO1010510 | 1,096 | SW |
How Maysville compares
Full Missouri rankings →Maysville's score of 49/100 is below the average of 62/100 among major Missouri cities. It outscores 4 of 10 nearby cities. 6 of 10 nearby cities score higher.
Nearby cities
View Missouri rankings →About Maysville, MO
Wikipedia →Maysville is a city in DeKalb County, Missouri, United States. The population was 1,095 at the 2020 census. Maysville is the county seat of DeKalb County.
Learn more about your water
Guides and resources related to Maysville's water quality findings.
Explore water quality across Dekalb
Frequently asked questions
Is Maysville, MO tap water safe to drink?
Maysville's water quality earned a grade of D (49/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #466 out of 509 cities tested in Missouri.
What contaminants are in Maysville's water?
Lead was measured at 4.4 ppb (90th percentile). 116 violations are on record.
How is Maysville's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Maysville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Maysville's water come from?
Maysville's water is sourced from Surface water. The city has 1 water system serving approximately 1,096 residents.
What health violations has Maysville's water system had?
Maysville has 100 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
How does Maysville's water compare to other cities?
Maysville ranks #466 out of 509 cities in Missouri (better than 8% of state cities) and #13369 out of 15744 cities nationally (15th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Maysville's small water system affect quality?
Maysville's system serves approximately 1,096 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 116 violations on record.