Loading water data...
Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Water quality data for 2 cities serving 765,136 residents
Hillsborough County in Florida has an average water quality score of 73/100 (Grade C) based on analysis of 2 municipal water systems. The county's water systems serve approximately 765,136 residents.
Water quality in Hillsborough County is fair, with some cities showing room for improvement. Tampa has the best water quality at 74/100.
2 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Tampa Biggest deduction: PFOA detected at up to 4.6 ppt in UCMR5 sampling (2025-09-11), at or above EPA's 4 ppt MCL (−10 pts) | 74 | C | 733,886 |
| 2 | Temple Terrace Biggest deduction: PFOA detected at up to 10 ppt in UCMR5 sampling (2025-05-21), at or above EPA's 4 ppt MCL (−10 pts) | 72 | C | 31,250 |
Real EPA readings across county water systems (lead: latest 90th percentile; PFAS: UCMR5 2023–2026; others: 2012–2019 averages)
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| PFAS (PFOA/PFOS max, UCMR5) | 13.2 ppt | 19.5 ppt | 4 ppt | 330% | 2 |
| TTHM (2012–2019 avg) | 27.278 ug/L | 36.736 ug/L | 80 ug/L | 34.1% | 2 |
| HAA5 (2012–2019 avg) | 11.53 ug/L | 12.387 ug/L | 60 ug/L | 19.2% | 2 |
| Fluoride (2012–2019 avg) | 0.653 mg/L | 0.835 mg/L | 4 mg/L | 16.3% | 2 |
| Nitrate (2012–2019 avg) | 1.074 mg/L | 1.894 mg/L | 10 mg/L | 10.7% | 2 |
| Arsenic (2012–2019 avg) | 0.898 ug/L | 0.97 ug/L | 10 ug/L | 9% | 2 |
| Uranium (2012–2019 avg) | 2.384 ug/L | 4.768 ug/L | 30 ug/L | 7.9% | 2 |
| Lead (90th percentile) | 0.75 ppb | 1.5 ppb | 15 ppb | 5% | 2 |
Recent violations across county water systems
Monitoring — Monitoring, Additional Routine (RTCR) - Revised Total Coliform Rule
11/30/2024
Monitoring — Monitoring, Additional Routine (RTCR) - Revised Total Coliform Rule
10/31/2024
Water quality in Hillsborough County, Florida reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 2 municipal water systems serving a combined population of over 765,136 residents.
The county shows moderate water quality performance, with scores ranging from 72/100 in Temple Terrace to 74/100 in Tampa. This 2-point spread indicates relatively consistent water quality standards across municipal systems.
The most prevalent contaminants detected across Hillsborough County water systems include PFAS (PFOA/PFOS max, UCMR5), TTHM (2012–2019 avg), HAA5 (2012–2019 avg). At least one reading averages above 50% of its EPA limit across the county's systems, worth attention from residents and utilities.
Water quality in Hillsborough County is fair but shows room for improvement. Residents in cities scoring below 70 should consider water filtration, particularly for drinking and cooking. Check your specific city's report above for personalized recommendations.
Hillsborough County has an average water quality score of 73/100 (Grade C) based on analysis of 2 municipal water systems serving 765,136 residents.
Tampa has the highest water quality score in Hillsborough County at 74/100. View the detailed report for Tampa.
Given the water quality variation across Hillsborough County, we recommend reviewing your specific city's water quality report. 0 cities have scores below 70, where filtration is particularly recommended.
Click on any city in the rankings table above to view its detailed water quality report, including contaminant levels, EPA compliance history, and filter recommendations.