What’s in Pasco County’s water?
Start with your water system, then look at the numbers.
This page summarizes the Pasco County Regional Water System, PWS 651-1361. Its 2025 report contains both local system data and separate Tampa Bay Water supply data. Other Pasco systems have their own reports in the county directory. Source
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Choose the report for your utility
The Regional Water System reports receiving about 95% of its drinking water from Tampa Bay Water. Its supply combines groundwater, surface water and desalinated water. Pasco’s directory lists separate reports for systems including Lake Jovita, Blanton Lakes and Southeast No. 2.
Match the utility and system on your water bill. A ZIP code or mailing address does not establish service boundaries.
What the reports measured
Browse the selected results by utility. These are substances and indicators—not a count of hazards in your home. Open the linked reports for the complete utility records.
ppm = mg/L; ppb = µg/L; ppt = ng/L. ND means below detection, not zero. MCL and MRDL are regulatory benchmarks reported in the source; action levels trigger system action. Annual averages, individual samples and household-tap percentiles are different measures. Compare like with like.
Sample years stay attached to each result. These historical reports do not replace current utility notices or a test of your tap.
20 report entries
No entries match. Try another search or source.
01Pasco County Regional · PWS 651-1361Reported results, sample dates and source links14
| Substance / indicator | Reported result | Benchmark in source | Sample year / source |
|---|---|---|---|
| Chlorine and chloramines | 3.44 ppmHighest running annual averageIndividual range: 0.6–5.8 ppm | MRDL 4 ppm | 2025 Source |
| TTHM | 21.2 ppbHighest locational running annual averageIndividual range: 3.5–39.4 ppb | MCL 80 ppb | 2025 Source |
| HAA5 | 11.7 ppbHighest locational running annual averageIndividual range: 0.3–11.3 ppb | MCL 60 ppb | 2025 Source |
| Alpha emitters | 2.98 pCi/LHighest reported resultIndividual range: ND–2.98 pCi/L | MCL 15 pCi/L | 2023 Source |
| Combined radium | 1.713 pCi/LHighest reported resultIndividual range: ND–1.713 pCi/L | MCL 5 pCi/L | 2023 Source |
| Uranium | 1.41 µg/LHighest reported resultIndividual range: ND–1.41 µg/L | MCL 30 µg/L | 2023 Source |
| Arsenic | 1.2 ppbHighest reported resultIndividual range: ND–1.2 ppb | MCL 10 ppb | 2023 Source |
| Barium | 0.016 ppmHighest reported resultIndividual range: 0.005–0.016 ppm | MCL 2 ppm | 2023 Source |
| Fluoride | 0.28 ppmHighest reported resultIndividual range: 0.061–0.28 ppm | MCL 4 ppm | 2023 Source |
| Nitrate · as nitrogen | 1.45 ppmJanuary sampleIndividual range: ND–1.45 ppm | MCL 10 ppm | 2025 Source |
| Nitrite · as nitrogen | 0.020 ppmJanuary sampleIndividual range: ND–0.020 ppm | MCL 1 ppm | 2025 Source |
| Sodium | 32.3 ppmHighest reported resultIndividual range: 7.4–32.3 ppm | Source standard 160 ppm | 2023 Source |
| Lead · household taps | ND ppb90th percentile · June | Action level 15 ppb | 2023 Source |
| Copper · household taps | 0.975 ppm90th percentile · June | Action level 1.3 ppm | 2023 Source |
02Tampa Bay Water · RSWTPEFF supply sampling pointReported results, sample dates and source links5
| Substance / indicator | Reported result | Benchmark in source | Sample year / source |
|---|---|---|---|
| PFBAMRL is a reporting threshold, not a safety limit. The source lists PFAS compliance status as N/A; this row does not assign a current violation or home concentration. | 6.5 pptAverage · August and NovemberIndividual range: 5.9–7.5 ppt | MRL 5 ppt | 2025 Source |
| PFBSMRL is a reporting threshold, not a safety limit. The source lists PFAS compliance status as N/A; this row does not assign a current violation or home concentration. | 7.4 pptAverage · August and NovemberIndividual range: 5.6–8.9 ppt | MRL 3 ppt | 2025 Source |
| PFHxAMRL is a reporting threshold, not a safety limit. The source lists PFAS compliance status as N/A; this row does not assign a current violation or home concentration. | 5.9 pptAverage · August and NovemberIndividual range: 5.4–6.4 ppt | MRL 3 ppt | 2025 Source |
| PFOSMRL is a reporting threshold, not a safety limit. The source lists PFAS compliance status as N/A; this row does not assign a current violation or home concentration. | 5.5 pptAverage · August and NovemberIndividual range: 5.3–5.7 ppt | MRL 4 ppt | 2025 Source |
| PFPeAMRL is a reporting threshold, not a safety limit. The source lists PFAS compliance status as N/A; this row does not assign a current violation or home concentration. | 7.9 pptAverage · August and NovemberIndividual range: 6.7–8.7 ppt | MRL 3 ppt | 2025 Source |
03Tampa Bay Water · surface-water supplyReported results, sample dates and source links1
| Substance / indicator | Reported result | Benchmark in source | Sample year / source |
|---|---|---|---|
| Foaming agentsThe source marks an aesthetic-standard violation. This supplier value is not a Pasco tap measurement. | 1.80 ppmHighest detected resultIndividual range: ND–1.80 ppm | Secondary standard 0.5 ppm | 2025 Source |
A closer look at your local water
These results describe Pasco County Regional Public Water System (FL6511361), not every home or water system in Pasco County. Match this system to your water bill before using the results.
Source record: PCUD-PASCO COUNTY REGIONAL PWS · Selected test records: 2013-02-18 – 2024-05-13
Results come from different testing periods. A detection is not, by itself, a finding that water is unsafe. “Not detected” means below the test’s reporting level; it does not mean zero. Missing results mean we have not verified that data here.
PFAS monitoring6 of 29 tested PFAS compounds detected
The table shows each compound’s highest reported result and latest listed test date. Those may come from different samples. Results are in parts per trillion (ppt).
| Substance | Highest reported result | Latest listed test | Detected samples |
|---|---|---|---|
| PFOS | 8.1 ppt | 6 | |
| PFPeA | 10 ppt | 13 | |
| PFBS | 8.7 ppt | 8 | |
| PFHxA | 8.1 ppt | 11 | |
| PFBA | 6.7 ppt | 3 | |
| PFHpA | 3.8 ppt | 2 |
Lithium monitoringNot detected
MyTapWater reports lithium was tested and not detected. Sample dates and reporting limits: see the source report.
More tested substances3 selected entries
Selected historical tests, with their original dates. “Detected” means at least one positive result in the listed period. “Below reporting level” means all retrieved samples for that entry were below the reporting level. These older tests do not describe today’s water at your tap.
| Substance | Reported result | Sampling period |
|---|---|---|
| chlorate | Detected | – |
| 1,4-dioxane | Detected | – |
| chloromethane | Below reporting level | – |
This is a selection of results from MyTapWater, which compiles public water-system records. Open the source for the complete tables, methods and reporting limits. Check your utility’s latest report and current notices for updates. Source
A list of tested substances is not a list of what a filter removes. Choose a system using its verified contaminant-reduction specifications and your water source. A softener addresses hardness and remains optional.
Do you need a water softener?
No. Softening is optional and is a separate decision from filtration. Use a home hardness test and your preferences about scale and water feel; your plumber confirms equipment size and settings.
A finished-water hardness range was not verified in the Pasco Regional 2025 report or county report directory reviewed here. This does not mean the water is soft. Regional estimates, chloramine levels and other contaminant results cannot replace a home hardness test. Softening remains optional. Source
Hardness describes dissolved minerals, not an overall water safety score. A filter and a softener do different jobs. Source
Use my water and home detailsTest at home
No verified finished-water range is shown for this system. A home test provides a starting point.
Softening is an optional choice for scale and water feel.
A filter, a softener, or both?
Choose the job you need done. Size comes next, based on water use and peak flow.
Whole-home filter
For whole-home filtration goals. Match the exact system’s performance claims to the substances you want to address.
A filter alone does not replace a hardness-removing softener.
Whole-home softener
Optional for hard-water scale and water feel. A softener removes hardness minerals; it is not a general contaminant-removal system.
A softener does not replace a filter selected for a specific contaminant.
Filter + softener
Choose both when filtration and hardness are separate priorities. You can start with the filter in the home-matching flow.
Both units require maintenance, space and a suitable installation.
Proposed pricing. Installation, shipping and tax are additional. Purchases are paused during the pilot. You hire and pay your plumber directly.
For drinking water alone, a suitable kitchen-tap filter may be enough. Keep working equipment that already meets your goal. Wells, shared plumbing and unusually high demand need a separate assessment. No Clearhouse system is claimed to remove every substance in this report. Source
Choose equipment using model-specific performance evidence and maintain it as instructed. Removing disinfectant throughout a home also changes microbial protection in the plumbing. Source
Your water report is the start. Your home decides the fit.
A few household details help narrow the size. Your street address is optional, and “I’m not sure” is always an option.
- Confirm the name on your water bill.
- Share bathrooms, household size and existing equipment.
- Choose a system. Hire your own plumber.
Want help choosing?
Send your water goals to Clearhouse for a fit review.
Common questions
Why do some Pasco results say 2023 in a 2025 report?
Utilities do not sample every substance at the same frequency. The 2025 Regional report includes older permitted sampling results, including 2023 lead, copper and several inorganic results. Each row preserves its sample year. Source
Is a water softener required?
No. Softening is optional and is a separate decision from filtration. Use a home hardness test and your preferences about scale and water feel; your plumber confirms equipment size and settings.
Does this report test my home?
No. Utility reports describe particular systems and sample periods. Plumbing, service lines and treatment already in a home can change the result at the tap.
Will one whole-home filter remove everything listed?
No. Select equipment by its specific tested or certified reduction claims and rated flow. A long contaminant list is not evidence that a particular system removes every item.
Sources & methodology
We transcribe selected utility results and retain sample dates, units, sampling basis and source links. We separate regional supply samples from local distribution data and flag source inconsistencies. Missing data are not treated as non-detections.
Clearhouse sells water treatment equipment and is not a utility or testing laboratory. Report presence alone does not establish a health risk, a need for treatment or a product’s removal performance.
- Pasco Regional · 2025 · PWS 651-1361
- All Pasco County system reports
- Source · USGS
- Source · CDC
- MyTapWater · Pasco County Regional Public Water System · FL6511361 · Source reviewed October 3, 2026