Is Frankfort, KS Tap Water Safe to Drink?
Graded B+ — but Chlorate was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
84.7/100
waterverge.com Frankfort, KS — Water Quality Report
Frankfort's drinking water received a grade of B+ (84.7 out of 100), indicating good water quality. The city's 1 water system serves approximately 717 residents using groundwater.
Lead levels were measured at 9.4 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 9 violations on record, including 4 health-based violations. 3 remain unresolved.
What to know about Frankfort's water
Frankfort ranks #92 out of 323 cities in Kansas for water quality, placing it mid-range in the state.
Frankfort relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
Hexavalent chromium (chromium-6) was detected at 0.27 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
As a small community water system, Frankfort may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Frankfort, KS water safe to drink?
Frankfort's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (84.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 717 residents using groundwater (wells).
Recent water quality updates for Frankfort
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Frankfort's water quality assessment. Grade: B+ (84.7/100).
Contaminants: Groundwater Rule.
Contaminants: Lead and Copper Rule.
1 health-based. Contaminants: Coliform (TCR).
Federal disaster declaration (FEMA DR-3236). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1000). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Frankfort's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Violation history
Frankfort's water system has 9 total violations on record, including 4 health-based violations. 3 remain unresolved.
Flood & environmental risk
Marshall County has experienced 3 federally declared disasters since 1973. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Black Vermillion R Nr Frankfort.
Where does Frankfort's water come from?
Frankfort's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 717 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Black Vermillion R Nr Frankfort (river).
What Frankfort residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Frankfort'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.
Frankfort'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
Marshall County has experienced 3 federally declared disasters since 1973. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Frankfort's water supply, we recommend the following filter types.
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. | 9.4 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Frankfort compares by contaminant
Explore where Frankfort ranks among all Kansas cities for specific contaminants.
Water source & infrastructure
Where Frankfort's water comes from
Frankfort's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 717 people through 1 water system.
Water bodies near Frankfort
Frankfort is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Frankfort
| System Name | PWSID | Population | Source |
|---|---|---|---|
| FRANKFORT, CITY OF | KS2011708 | 717 | GW |
How Frankfort compares
Full Kansas rankings →Frankfort's score of 84.7/100 is above the average of 62/100 among major Kansas cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Kansas rankings →About Frankfort, KS
Learn more about your water
Guides and resources related to Frankfort's water quality findings.
Explore water quality across Marshall
Frequently asked questions
Is Frankfort, KS tap water safe to drink?
Frankfort's water quality earned a grade of B+ (84.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #92 out of 323 cities tested in Kansas.
What contaminants are in Frankfort's water?
Lead was measured at 9.4 ppb (90th percentile). 9 violations are on record.
How is Frankfort'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 Frankfort?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Frankfort's water come from?
Frankfort's water is sourced from Groundwater. The city has 1 water system serving approximately 717 residents.
What health violations has Frankfort's water system had?
Frankfort has 4 health-based violations on record. The most recent violation was recorded in February 2018. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Frankfort's groundwater at risk of contamination?
Frankfort uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 9 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Frankfort's water compare to other cities?
Frankfort ranks #92 out of 323 cities in Kansas (better than 72% of state cities) and #5748 out of 15744 cities nationally (64th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Frankfort's small water system affect quality?
Frankfort's system serves approximately 717 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 9 violations on record.