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Updated 2026-10-15
County water report

Pinellas County Water Quality: 6 Cities Ranked by the Records

Pinellas County, Florida: 6 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Pinellas County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanesulfonic acid (PFOS)Detected in 2 systems of 6 tested4.0 ng/L federal MCL (2024) · US EPAHighest36.9 ng/L
Perfluorooctanoic acid (PFOA)Detected in 1 system of 6 tested4.0 ng/L federal MCL (2024) · US EPAHighest10.5 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 6 tested10 ng/L federal MCL (2024) · US EPAHighest9.1 ng/L
Lead (90th percentile)Detected in 6 systems15 µg/L federal action level · US EPAHighest2.6 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 6 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest14.6 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 2 systems of 6 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest7 ng/L
Perfluorobutanoic acid (PFBA)Detected in 1 system of 6 testedNo federal or state limit; shown for transparencyHighest10.5 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 6 testedNo federal or state limit; shown for transparencyHighest4.4 ng/L
1 more contaminant detectedShow
Perfluoropentanoic acid (PFPeA)Detected in 4 systems of 6 testedNo federal or state limit; shown for transparencyHighest10.2 ng/L
22 substances tested, none detected in any systemShow

Tested in these 6 systems: CLEARWATER WATER SYSTEM, DUNEDIN WATER SYSTEM, OLDSMAR WATER SYSTEM, PINELLAS PARK WATER DEPT, SAFETY HARBOR WATER DEPT, TARPON SPRINGS WATER SYSTEM

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • Lithium
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
6 cities

Cities ranked by the records

Showing 6 of 6 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Pinellas County2 of 6 city reports had a PFAS sample above a 2024 EPA limit
  1. Tarpon Springs36.9 ng/L
  2. Clearwater5.9 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Florida
Lead

0of 6 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Florida
Who supplies the county

Largest water systems

  1. ClearwaterCLEARWATER WATER SYSTEM · FL6520336
    115,000 served
  2. Pinellas ParkPINELLAS PARK WATER DEPT · FL6521406
    48,939 served
  3. DunedinDUNEDIN WATER SYSTEM · FL6520486
    46,161 served
  4. Tarpon SpringsTARPON SPRINGS WATER SYSTEM · FL6521784
    28,875 served
  5. Safety HarborSAFETY HARBOR WATER DEPT · FL6521576
    16,473 served
  6. OldsmarOLDSMAR WATER SYSTEM · FL6521417
    14,898 served
Questions

Frequently asked

How does Pinellas County tap water compare across cities?

PurityMap ranks 6 cities in Pinellas County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Safety Harbor's main water system: SAFETY HARBOR WATER DEPT · PWSID FL6521576 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Pinellas County cities had a PFAS sample above a 2024 EPA limit?

2 of 6 Pinellas County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Tarpon Springs (PFOS 36.9 ng/L), Clearwater (PFOS 5.9 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 4.

Is there lead in Pinellas County tap water?

Utilities report lead as a 90th-percentile result from home taps. 6 of 6 Pinellas County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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