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Updated 2026-10-15
County water report

Pasco County Water Quality: 4 Cities Ranked by the Records

Pasco County, Florida: 4 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 Pasco 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 3 systems of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest26 ng/L
Perfluorooctanoic acid (PFOA)Detected in 1 system of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest7.4 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 4 tested10 ng/L federal MCL (2024) · US EPAHighest18.1 ng/L
Lead (90th percentile)Detected in 2 systems of 4 tested15 µg/L federal action level · US EPAHighest2 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 4 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest10.5 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 4 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest8.8 ng/L
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest6.9 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest3 ng/L
1 more contaminant detectedShow
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest19.1 ng/L
22 substances tested, none detected in any systemShow

Tested in these 4 systems: DADE CITY WATER DEPT, NEW PORT RICHEY WATER DEPT, SEVEN SPRINGS, ZEPHYRHILLS CITY OF

  • 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-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)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
4 cities

Cities ranked by the records

Showing 4 of 4 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 Pasco County3 of 4 city reports had a PFAS sample above a 2024 EPA limit
  1. Zephyrhills26 ng/L
  2. Dade City7.6 ng/L
  3. Trinity4.5 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Florida
Lead

0of 4 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. New Port RicheyNEW PORT RICHEY WATER DEPT · FL6511255
    33,000 served
  2. TrinitySEVEN SPRINGS · FL6512214
    32,834 served
  3. ZephyrhillsZEPHYRHILLS CITY OF · FL6512020
    29,117 served
  4. Dade CityDADE CITY WATER DEPT · FL6510424
    15,561 served
Questions

Frequently asked

How does Pasco County tap water compare across cities?

PurityMap ranks 4 cities in Pasco 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 New Port Richey's main water system: NEW PORT RICHEY WATER DEPT · PWSID FL6511255 · Purity Score 98 (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 Pasco County cities had a PFAS sample above a 2024 EPA limit?

3 of 4 Pasco County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Zephyrhills (PFOS 26 ng/L), Dade City (PFOS 7.6 ng/L), Trinity (PFOS 4.5 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 3.

Is there lead in Pasco County tap water?

Utilities report lead as a 90th-percentile result from home taps. 2 of 4 Pasco 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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