Is Lake Winnebago, MO Tap Water Safe to Drink?
Graded A, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
91.2/100
waterverge.com Lake Winnebago, MO — Water Quality Report
Lake Winnebago's drinking water received a grade of A (91.2 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,600 residents using purchased ground water.
Lead levels were measured at 1.9 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 9 violations on record, including 0 health-based violations. 2 remain unresolved.
What to know about Lake Winnebago's water
Lake Winnebago ranks #63 out of 509 cities in Missouri for water quality, placing it above average in the state.
Lake Winnebago purchases its water from a regional wholesaler, meaning quality depends on both the supplier's treatment and the local distribution system's condition.
As a small community water system, Lake Winnebago may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Lake Winnebago, MO water safe to drink?
Lake Winnebago's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (91.2/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 1,600 residents using groundwater (wells).
Recent water quality updates for Lake Winnebago
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lake Winnebago's water quality assessment. Grade: A (91.2/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3232). Hurricane event — may have impacted local water infrastructure.
Contaminants: Coliform (TCR).
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 Lake Winnebago's water supply.
Well within EPA limits.
Violation history
Lake Winnebago's water system has 9 total violations on record, including 0 health-based violations. 2 remain unresolved.
Flood & environmental risk
Cass County has experienced 4 federally declared disasters since 1982. 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 Longview Reservoir At Kansas City, Cedar Creek Near Lee'S Summit.
Where does Lake Winnebago's water come from?
Lake Winnebago's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,600 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Longview Reservoir At Kansas City (lake), Cedar Creek Near Lee'S Summit (river).
What Lake Winnebago residents can do
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.
Lake Winnebago'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
Top industrial polluters within 10 miles of Lake Winnebago
Industrial polluters nearby
Reported releases to surface water by facilities near Lake Winnebago, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ROM BELTON, MO64012 | — | — | 8.6 mi |
BILLY GOAT INDUSTRIES INC LEES SUMMIT, MO64082 | — | — | 4.6 mi |
PAVESTONE - LEE'S SUMMIT MO PLANT LEES SUMMIT, MO64064 | — | — | 9.2 mi |
HIXSON LUMBER CO LLC PLEASANT HILL, MO64080 | — | — | 6.3 mi |
GEIGER READY MIX LEES SUMMIT, MO64082 | — | — | 3.9 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Cass County has experienced 4 federally declared disasters since 1982. 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. | 1.9 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Lake Winnebago compares by contaminant
Explore where Lake Winnebago ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Lake Winnebago's water comes from
Lake Winnebago purchases its water supply from a regional wholesale provider rather than treating raw water directly.
Water quality depends on both the wholesaler's treatment standards and the condition of Lake Winnebago's local distribution pipes and storage facilities.
Purchased water systems are common in suburban areas and smaller communities that lack the infrastructure for independent treatment.
The system is operated by local government ownership and serves approximately 1,600 people through 1 water system.
Water bodies near Lake Winnebago
Lake Winnebago is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Lake Winnebago
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LAKE WINNEBAGO PWS | MO1010880 | 1,600 | GWP |
How Lake Winnebago compares
Full Missouri rankings →Lake Winnebago's score of 91.2/100 is above the average of 62/100 among major Missouri cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Lake Winnebago, MO
Learn more about your water
Guides and resources related to Lake Winnebago's water quality findings.
Explore water quality across Cass
Frequently asked questions
Is Lake Winnebago, MO tap water safe to drink?
Lake Winnebago's water quality earned a grade of A (91.2/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #63 out of 509 cities tested in Missouri.
What contaminants are in Lake Winnebago's water?
Lead was measured at 1.9 ppb (90th percentile). 9 violations are on record.
How is Lake Winnebago'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 Lake Winnebago?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lake Winnebago's water come from?
Lake Winnebago's water is sourced from Purchased ground water. The city has 1 water system serving approximately 1,600 residents.
Is Lake Winnebago's groundwater at risk of contamination?
Lake Winnebago 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 Lake Winnebago's water compare to other cities?
Lake Winnebago ranks #63 out of 509 cities in Missouri (better than 88% of state cities) and #1826 out of 15744 cities nationally (88th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lake Winnebago's small water system affect quality?
Lake Winnebago's system serves approximately 1,600 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.