Is Tonto Village, MO Tap Water Safe to Drink?
Graded C-, with 55 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
58.3/100
waterverge.com Tonto Village, MO — Water Quality Report
Tonto Village's drinking water received a grade of C- (58.3 out of 100), indicating poor water quality. The city's 1 water system serves approximately 512 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 335 violations on record, including 2 health-based violations. 55 remain unresolved.
What to know about Tonto Village's water
Tonto Village ranks #449 out of 509 cities in Missouri for water quality, placing it among the lowest-rated in the state.
Tonto Village 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, Tonto Village may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Tonto Village, MO water safe to drink?
Tonto Village's drinking water has significant quality concerns based on EPA testing data. With a grade of C- (58.3/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 512 residents using groundwater (wells).
Recent water quality updates for Tonto Village
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Tonto Village's water quality assessment. Grade: C- (58.3/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Public Notice.
1 health-based. Contaminants: Revised Total Coliform Rule, E. COLI.
Key contaminant findings
Based on the most recent EPA sampling data for Tonto Village's water supply.
Well within EPA limits.
Violation history
Tonto Village's water system has 335 total violations on record, including 2 health-based violations. 55 remain unresolved. 5 violations were issued in the last 5 years.
Where does Tonto Village's water come from?
Tonto Village's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 512 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Creve Coeur Creek At Chesterfield (river), Creve Coeur Creek Near Creve Coeur (river), Fee Fee Creek Near Bridgeton (river), River Des Peres Near University City (river), River Des Peres Tributary At Pagedale (river).
What Tonto Village residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Tonto Village'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
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 Tonto Village compares by contaminant
Explore where Tonto Village ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Tonto Village's water comes from
Tonto Village'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 private ownership and serves approximately 512 people through 1 water system.
Water bodies near Tonto Village
Tonto Village is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Tonto Village
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CS TONTO VILLAGE WATER COMPANY | AZ0404023 | 512 | GW |
How Tonto Village compares
Full Missouri rankings →Tonto Village's score of 58.3/100 is on par with the average of 62/100 among major Missouri cities. It outscores 4 of 10 nearby cities. 6 of 10 nearby cities score higher.
Nearby cities
View Missouri rankings →About Tonto Village, MO
Wikipedia →Des Peres is a city in west St. Louis County, Missouri, United States. The population was 9,193 at the 2020 census.
Learn more about your water
Guides and resources related to Tonto Village's water quality findings.
Explore water quality across Gila
Frequently asked questions
Is Tonto Village, MO tap water safe to drink?
Tonto Village's water quality earned a grade of C- (58.3/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #449 out of 509 cities tested in Missouri.
What contaminants are in Tonto Village's water?
Lead was measured at 0.0 ppb (90th percentile). 335 violations are on record.
How is Tonto Village'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 Tonto Village?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Tonto Village's water come from?
Tonto Village's water is sourced from Groundwater. The city has 1 water system serving approximately 512 residents.
What health violations has Tonto Village's water system had?
Tonto Village has 2 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. 55 violations remain unresolved.
Is Tonto Village's groundwater at risk of contamination?
Tonto Village 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 335 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 Tonto Village's water compare to other cities?
Tonto Village ranks #449 out of 509 cities in Missouri (better than 12% of state cities) and #12295 out of 15744 cities nationally (22th percentile). The grade of C- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Tonto Village's small water system affect quality?
Tonto Village's system serves approximately 512 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 335 violations on record.