Is Madison, KS Tap Water Safe to Drink?
Graded D+ — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
50/100
waterverge.com Madison, KS — Water Quality Report
Madison's drinking water received a grade of D+ (50 out of 100), indicating poor water quality. The city's 2 water systems serve approximately 1,082 residents using surface water.
Lead levels were measured at 2.1 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 127 violations on record, including 56 health-based violations. 27 remain unresolved.
What to know about Madison's water
Madison ranks #299 out of 323 cities in Kansas 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, Madison may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 14 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Madison, KS water safe to drink?
Madison's drinking water has significant quality concerns based on EPA testing data. With a grade of D+ (50/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 1,082 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Madison
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Madison's water quality assessment. Grade: D+ (50/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
2 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS, Total Haloacetic Acids (HAA5).
2 health-based. Contaminants: Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-3236). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-514). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Madison's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Madison's water system has 127 total violations on record, including 56 health-based violations. 27 remain unresolved. 14 violations were issued in the last 5 years.
Flood & environmental risk
Greenwood County has experienced 4 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 Madison's water come from?
Madison's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 1,082 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Madison residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Madison'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.
Madison'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
Greenwood County has experienced 4 federally declared disasters since 1965. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Madison'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. | 2.1 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.05 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 2.051 mg/L (1998)
EPA action level: 1.3 mg/L
See how Madison compares by contaminant
Explore where Madison ranks among all Kansas cities for specific contaminants.
Water source & infrastructure
Where Madison's water comes from
Madison'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 1,082 people through 2 water systems.
Water systems serving Madison
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MADISON, CITY OF | KS2007301 | 682 | SW |
| GREENWOOD CO RWD 3 | KS2007309 | 400 | SWP |
How Madison compares
Full Kansas rankings →Madison's score of 50/100 is below the average of 62/100 among major Kansas cities. It outscores 3 of 10 nearby cities. 7 of 10 nearby cities score higher.
Nearby cities
View Kansas rankings →About Madison, KS
Wikipedia →Madison is a city in Greenwood County, Kansas, United States, along the Verdigris River. As of the 2020 census, the population of the city was 689.
Learn more about your water
Guides and resources related to Madison's water quality findings.
Explore water quality across Greenwood
Frequently asked questions
Is Madison, KS tap water safe to drink?
Madison's water quality earned a grade of D+ (50/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #299 out of 323 cities tested in Kansas.
What contaminants are in Madison's water?
Lead was measured at 2.1 ppb (90th percentile). 127 violations are on record.
How is Madison'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 Madison?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Madison's water come from?
Madison's water is sourced from Surface water. The city has 2 water systems serving approximately 1,082 residents.
What health violations has Madison's water system had?
Madison has 56 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. 27 violations remain unresolved.
How does Madison's water compare to other cities?
Madison ranks #299 out of 323 cities in Kansas (better than 7% of state cities) and #13162 out of 15744 cities nationally (16th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.