Is Catalina, MO Tap Water Safe to Drink?
Graded A-, with 12 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
85.4/100
waterverge.com Catalina, MO — Water Quality Report
Catalina's drinking water received a grade of A- (85.4 out of 100), indicating good water quality. The city's 1 water system serves approximately 2,613 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 133 violations on record, including 0 health-based violations. 12 remain unresolved.
What to know about Catalina's water
Catalina ranks #215 out of 509 cities in Missouri for water quality, placing it mid-range in the state.
Catalina 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, Catalina may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Catalina, MO water safe to drink?
Catalina's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (85.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,613 residents using groundwater (wells).
Recent water quality updates for Catalina
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Catalina's water quality assessment. Grade: A- (85.4/100).
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Revised Total Coliform Rule.
Contaminants: Chlorine.
Key contaminant findings
Based on the most recent EPA sampling data for Catalina's water supply.
Well within EPA limits.
Violation history
Catalina's water system has 133 total violations on record, including 0 health-based violations. 12 remain unresolved. 2 violations were issued in the last 5 years.
Where does Catalina's water come from?
Catalina's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,613 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 Catalina residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Catalina'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 Catalina compares by contaminant
Explore where Catalina ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Catalina's water comes from
Catalina'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 2,613 people through 1 water system.
Water bodies near Catalina
Catalina is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Catalina
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CS LOS CERROS WATER COMPANY INC | AZ0410128 | 2,613 | GW |
How Catalina compares
Full Missouri rankings →Catalina's score of 85.4/100 is above the average of 62/100 among major Missouri cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Catalina, 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 Catalina's water quality findings.
Explore water quality across Pima
Frequently asked questions
Is Catalina, MO tap water safe to drink?
Catalina's water quality earned a grade of A- (85.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #215 out of 509 cities tested in Missouri.
What contaminants are in Catalina's water?
Lead was measured at 0.0 ppb (90th percentile). 133 violations are on record.
How is Catalina'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 Catalina?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Catalina's water come from?
Catalina's water is sourced from Groundwater. The city has 1 water system serving approximately 2,613 residents.
Is Catalina's groundwater at risk of contamination?
Catalina 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 133 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 Catalina's water compare to other cities?
Catalina ranks #215 out of 509 cities in Missouri (better than 58% of state cities) and #5345 out of 15744 cities nationally (66th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Catalina's small water system affect quality?
Catalina's system serves approximately 2,613 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 133 violations on record.