Is Seffner, FL Tap Water Safe to Drink?
Graded B-, with 24 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
71.9/100
waterverge.com Seffner, FL — Water Quality Report
Seffner's drinking water received a grade of B- (71.9 out of 100), indicating fair water quality. The city's 9 water systems serve approximately 825 residents using purchased surface water.
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 206 violations on record, including 11 health-based violations. 24 remain unresolved.
What to know about Seffner's water
Seffner ranks #219 out of 388 cities in Florida for water quality, placing it below average in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Seffner may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 9 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Seffner, FL water safe to drink?
Seffner's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (71.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 9 water systems serve approximately 825 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Seffner
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Seffner's water quality assessment. Grade: B- (71.9/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Seffner's water supply.
Well within EPA limits.
Violation history
Seffner's water system has 206 total violations on record, including 11 health-based violations. 24 remain unresolved. 9 violations were issued in the last 5 years.
Where does Seffner's water come from?
Seffner's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 9 water systems serving approximately 825 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Seffner residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Seffner'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
Top industrial polluters within 10 miles of Seffner
Industrial polluters nearby
Reported releases to surface water by facilities near Seffner, ranked by pounds discharged annually.
Total reported releases to surface water: 3 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
VALMONT - TAMPA GALVANIZING TAMPA, FL33619 | Zinc compounds | 3 | 4.6 mi |
COASTAL AN OLDCASTLE CO TAMPA, FL33610 | Lead And Lead Compounds | 0 | 7.0 mi |
TAMPA BAY FISHERIES INC DOVER, FL33527 | — | — | 2.4 mi |
JAMES HARDIE BUILDING PRODUCTS PLANT CITY PLANT CITY, FL33566 | — | — | 7.8 mi |
PALM HARBOR HOMES INC. PLANT CITY, FL33563 | — | — | 9.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Seffner
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- TAYLOR ROAD LANDFILL1.3 mi
- PEAK OIL CO BAY DRUM CO4.6 mi
- REEVES SOUTHEASTERN GALVANIZING CORP4.6 mi
- ARKLA TERRA PROPERTY4.7 mi
- MRI CORP TAMPA5.8 mi
+ 5 more sites
Source: EPA Superfund National Priorities List
Drought conditions
D3 — extreme droughtHillsborough 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.
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 Seffner compares by contaminant
Explore where Seffner ranks among all Florida cities for specific contaminants.
Water source & infrastructure
Where Seffner's water comes from
Seffner's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by private ownership and serves approximately 825 people through 9 water systems.
Water systems serving Seffner
| System Name | PWSID | Population | Source |
|---|---|---|---|
| GRACELAND ESTATES | FL6296416 | 152 | SWP |
| IMPERIAL OAKS | FL6296407 | 150 | SWP |
| TWIN PALMS MHP | FL6291870 | 136 | GW |
| RAINBOW FOREST MHP/ WIG-WAM RV | FL6295614 | 100 | GW |
| BLACK DAIRY ROAD TP | FL6291445 | 80 | GW |
| FAMILY RENTALS OF SEFFNER | FL6290505 | 75 | GW |
| LARRET MHP | FL6292653 | 50 | GW |
| SELF MOBILE HOME SITES | FL6291605 | 42 | GW |
| SUNLAND MHP | FL6295398 | 40 | GW |
How Seffner compares
Full Florida rankings →Seffner's score of 71.9/100 is above the average of 50/100 among major Florida cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Florida rankings →Learn more about your water
Guides and resources related to Seffner's water quality findings.
Explore water quality across Hillsborough
Frequently asked questions
Is Seffner, FL tap water safe to drink?
Seffner's water quality earned a grade of B- (71.9/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #219 out of 388 cities tested in Florida.
What contaminants are in Seffner's water?
Lead was measured at 0.0 ppb (90th percentile). 206 violations are on record.
How is Seffner'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 Seffner?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Seffner's water come from?
Seffner's water is sourced from Purchased surface water. The city has 9 water systems serving approximately 825 residents.
What health violations has Seffner's water system had?
Seffner has 11 health-based violations on record. The most recent violation was recorded in April 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 24 violations remain unresolved.
How does Seffner's water compare to other cities?
Seffner ranks #219 out of 388 cities in Florida (better than 44% of state cities) and #10474 out of 15744 cities nationally (34th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.