Is Marion, KY Tap Water Safe to Drink?
Graded B+, with 6 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
83.5/100
waterverge.com Marion, KY — Water Quality Report
Marion's drinking water received a grade of B+ (83.5 out of 100), indicating good water quality. The city's 1 water system serves approximately 3,039 residents using surface water.
Lead levels were measured at 0.0 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 55 violations on record, including 34 health-based violations. 6 remain unresolved.
What to know about Marion's water
Marion ranks #118 out of 246 cities in Kentucky for water quality, placing it mid-range 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, Marion may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Marion, KY water safe to drink?
Marion's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (83.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 3,039 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Marion
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Marion's water quality assessment. Grade: B+ (83.5/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
1 health-based. Contaminants: TTHM.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-4361). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3231). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Marion's water supply.
Well within EPA limits.
Violation history
Marion's water system has 55 total violations on record, including 34 health-based violations. 6 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Crittenden County has experienced 2 federally declared disasters since 2005. 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 Marion's water come from?
Marion's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 3,039 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Marion residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Marion'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.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D3 — extreme droughtCrittenden County is currently in D3 (extreme drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Crittenden County has experienced 2 federally declared disasters since 2005. 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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Marion compares by contaminant
Explore where Marion ranks among all Kentucky cities for specific contaminants.
Water source & infrastructure
Where Marion's water comes from
Marion'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 3,039 people through 1 water system.
Water systems serving Marion
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MARION WATER DEPARTMENT | KY0280267 | 3,039 | SW |
How Marion compares
Full Kentucky rankings →Marion's score of 83.5/100 is on par with the average of 80/100 among major Kentucky cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Kentucky rankings →About Marion, KY
Learn more about your water
Guides and resources related to Marion's water quality findings.
Explore water quality across Crittenden
Frequently asked questions
Is Marion, KY tap water safe to drink?
Marion's water quality earned a grade of B+ (83.5/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #118 out of 246 cities tested in Kentucky.
What contaminants are in Marion's water?
Lead was measured at 0.0 ppb (90th percentile). 55 violations are on record.
How is Marion'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 Marion?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Marion's water come from?
Marion's water is sourced from Surface water. The city has 1 water system serving approximately 3,039 residents.
What health violations has Marion's water system had?
Marion has 34 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 6 violations remain unresolved.
How does Marion's water compare to other cities?
Marion ranks #118 out of 246 cities in Kentucky (better than 52% of state cities) and #6394 out of 15744 cities nationally (59th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Marion's small water system affect quality?
Marion's system serves approximately 3,039 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 55 violations on record.