Is Osceola, 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 ↓
94/100
waterverge.com Osceola, MO — Water Quality Report
Osceola's drinking water received a grade of A (94 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 947 residents using groundwater.
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 10 violations on record, including 1 health-based violation. 2 remain unresolved.
What to know about Osceola's water
Osceola ranks #18 out of 509 cities in Missouri for water quality, placing it one of the best in the state.
Osceola 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.
As a small community water system, Osceola may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Osceola, MO water safe to drink?
Osceola's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (94/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 947 residents using groundwater (wells).
Recent water quality updates for Osceola
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Osceola's water quality assessment. Grade: A (94/100).
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4250). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3374). Flood event — may have impacted local water infrastructure.
Contaminants: Coliform (TCR).
Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Osceola's water supply.
Well within EPA limits.
Violation history
Osceola's water system has 10 total violations on record, including 1 health-based violation. 2 remain unresolved.
Flood & environmental risk
St. Clair County has experienced 5 federally declared disasters since 1986. 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 Osceola's water come from?
Osceola's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 947 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Osceola 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.
Osceola'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
St. Clair County has experienced 5 federally declared disasters since 1986. 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 Osceola compares by contaminant
Explore where Osceola ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Osceola's water comes from
Osceola'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 947 people through 1 water system.
Water systems serving Osceola
| System Name | PWSID | Population | Source |
|---|---|---|---|
| OSCEOLA PWS | MO5010612 | 947 | GW |
How Osceola compares
Full Missouri rankings →Osceola's score of 94/100 is above the average of 62/100 among major Missouri cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Osceola, MO
Learn more about your water
Guides and resources related to Osceola's water quality findings.
Explore water quality across St. Clair
Frequently asked questions
Is Osceola, MO tap water safe to drink?
Osceola's water quality earned a grade of A (94/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #18 out of 509 cities tested in Missouri.
What contaminants are in Osceola's water?
Lead was measured at 0.0 ppb (90th percentile). 10 violations are on record.
How is Osceola'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 Osceola?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Osceola's water come from?
Osceola's water is sourced from Groundwater. The city has 1 water system serving approximately 947 residents.
What health violations has Osceola's water system had?
Osceola has 1 health-based violation on record. The most recent violation was recorded in July 2017. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
Is Osceola's groundwater at risk of contamination?
Osceola 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 10 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 Osceola's water compare to other cities?
Osceola ranks #18 out of 509 cities in Missouri (better than 96% of state cities) and #659 out of 15744 cities nationally (96th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Osceola's small water system affect quality?
Osceola's system serves approximately 947 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 10 violations on record.