Is St Leo, FL Tap Water Safe to Drink?
Graded C, with 7 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
60.4/100
waterverge.com St Leo, FL — Water Quality Report
St Leo's drinking water received a grade of C (60.4 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 2,751 residents using groundwater.
Lead levels were measured at 2.5 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 56 violations on record, including 1 health-based violation. 7 remain unresolved.
What to know about St Leo's water
St Leo ranks #258 out of 388 cities in Florida for water quality, placing it below average in the state.
St Leo 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, St Leo may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 34 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is St Leo, FL water safe to drink?
St Leo's drinking water has significant quality concerns based on EPA testing data. With a grade of C (60.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 2,751 residents using groundwater (wells).
Recent water quality updates for St Leo
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into St Leo's water quality assessment. Grade: C (60.4/100).
Contaminants: E. COLI, Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4834). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3622). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for St Leo's water supply.
Well within EPA limits.
Violation history
St Leo's water system has 56 total violations on record, including 1 health-based violation. 7 remain unresolved. 34 violations were issued in the last 5 years.
Flood & environmental risk
Pasco County has experienced 10 federally declared disasters since 2018. 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 Trout Creek, Cypress Creek, Cypress Creek Tributary Nr Wesley Chapel, Withlacoochee River.
Where does St Leo's water come from?
St Leo's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 2,751 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Trout Creek (river), Cypress Creek (river), Cypress Creek Tributary Nr Wesley Chapel (river), Withlacoochee River (river).
What St Leo residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in St Leo'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.
St Leo'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
Drought conditions
D3 — extreme droughtPasco County is currently in D3 (extreme drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Pasco County has experienced 10 federally declared disasters since 2018. 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. | 2.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how St Leo compares by contaminant
Explore where St Leo ranks among all Florida cities for specific contaminants.
Water source & infrastructure
Where St Leo's water comes from
St Leo'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 2,751 people through 2 water systems.
Water bodies near St Leo
St Leo is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving St Leo
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ST. LEO UNIVERSITY | FL6515161 | 2,501 | GW |
| ST. LEO ABBEY WATER DEPT | FL6511710 | 250 | GW |
How St Leo compares
Full Florida rankings →St Leo's score of 60.4/100 is above the average of 50/100 among major Florida cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Florida rankings →About St Leo, FL
Learn more about your water
Guides and resources related to St Leo's water quality findings.
Explore water quality across Pasco
Frequently asked questions
Is St Leo, FL tap water safe to drink?
St Leo's water quality earned a grade of C (60.4/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #258 out of 388 cities tested in Florida.
What contaminants are in St Leo's water?
Lead was measured at 2.5 ppb (90th percentile). 56 violations are on record.
How is St Leo'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 St Leo?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does St Leo's water come from?
St Leo's water is sourced from Groundwater. The city has 2 water systems serving approximately 2,751 residents.
What health violations has St Leo's water system had?
St Leo has 1 health-based violation on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 7 violations remain unresolved.
Is St Leo's groundwater at risk of contamination?
St Leo 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 56 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 St Leo's water compare to other cities?
St Leo ranks #258 out of 388 cities in Florida (better than 34% of state cities) and #12089 out of 15744 cities nationally (23th percentile). The grade of C reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.