Is San Antonio, FL Tap Water Safe to Drink?
Graded D — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
46/100
waterverge.com San Antonio, FL — Water Quality Report
San Antonio's drinking water received a grade of D (46 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 3,553 residents using groundwater.
Lead levels were measured at 1.0 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 115 violations on record, including 15 health-based violations. 15 remain unresolved.
What to know about San Antonio's water
San Antonio ranks #309 out of 388 cities in Florida for water quality, placing it among the lowest-rated in the state.
San Antonio 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.
The system has seen 40 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is San Antonio, FL water safe to drink?
San Antonio's drinking water has significant quality concerns based on EPA testing data. With a grade of D (46/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 3,553 residents using groundwater (wells).
Recent water quality updates for San Antonio
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into San Antonio's water quality assessment. Grade: D (46/100).
Contaminants: Revised Total Coliform Rule, E. COLI.
Contaminants: Revised Total Coliform Rule, E. COLI.
Contaminants: E. COLI.
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 San Antonio's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
San Antonio's water system has 115 total violations on record, including 15 health-based violations. 15 remain unresolved. 40 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 San Antonio's water come from?
San Antonio's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 3,553 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 San Antonio residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in San Antonio'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.
San Antonio'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 San Antonio
Industrial polluters nearby
Reported releases to surface water by facilities near San Antonio, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
FENIX GROUP INC DADE CITY, FL33523 | — | — | 6.0 mi |
LATHAM POOL PRODUCTS INC D/B/A VIKING POOLS-FL ZEPHYRHILLS, FL33540 | — | — | 9.8 mi |
ARGOS SAN ANTONIO READY MIX PLANT SAN ANTONIO, FL33576 | — | — | 2.5 mi |
CEMEX EHREN CUT-OFF LAND O LAKES, FL34639 | — | — | 8.6 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
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.
Recommended water filters
Based on contaminants detected in San Antonio's water supply, we recommend the following filter types.
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. | 1.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.50 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how San Antonio compares by contaminant
Explore where San Antonio ranks among all Florida cities for specific contaminants.
Water source & infrastructure
Where San Antonio's water comes from
San Antonio'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 3,553 people through 3 water systems.
Water bodies near San Antonio
San Antonio is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving San Antonio
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SAN ANTONIO WATER DEPT-CITY OF | FL6510325 | 2,015 | GW |
| TRAVELERS REST RESORT INC | FL6511850 | 1,400 | GW |
| PCUD-BLANTON LAKE PARK | FL6512033 | 138 | GW |
How San Antonio compares
Full Florida rankings →San Antonio's score of 46/100 is on par with the average of 50/100 among major Florida cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Florida rankings →About San Antonio, FL
Wikipedia →San Antonio, or unofficially "San Ann" or "San An" as the locals call it, is a city in Pasco County, Florida, United States. It is a suburban city included in the Tampa-St. Petersburg-Clearwater, Florida Metropolitan Statistical Area, much more commonly known as the Tampa Bay Area. It lies within Florida's 12th congressional district. The population was 1,297 at the 2020 census.
Learn more about your water
Guides and resources related to San Antonio's water quality findings.
Explore water quality across Pasco
Frequently asked questions
Is San Antonio, FL tap water safe to drink?
San Antonio's water quality earned a grade of D (46/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #309 out of 388 cities tested in Florida.
What contaminants are in San Antonio's water?
Lead was measured at 1.0 ppb (90th percentile). 115 violations are on record.
How is San Antonio'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 San Antonio?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does San Antonio's water come from?
San Antonio's water is sourced from Groundwater. The city has 3 water systems serving approximately 3,553 residents.
What health violations has San Antonio's water system had?
San Antonio has 15 health-based violations 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. 15 violations remain unresolved.
Is San Antonio's groundwater at risk of contamination?
San Antonio 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 115 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 San Antonio's water compare to other cities?
San Antonio ranks #309 out of 388 cities in Florida (better than 20% of state cities) and #13979 out of 15744 cities nationally (11th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.