Data & Methodology — Volusia County

Full contaminant data, sample history, and sourcing for Volusia County. For readers who want to go beyond the summary.

Contaminant Data — All Analytes

710 well testing events on record, covering 23 analytes. Data spans 1954 to 2025.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. FL Avg
PFOS municipal 72 2023–2025 47%
178% of limit ~ typical
Iron 588 1965–2025 100%
29% of limit ↓ 86% below
Chloride 641 1955–2025 100%
22% of limit ↓ 55% below
PFOA municipal 72 2023–2025 33%
139% of limit ~ typical
Manganese 574 2002–2025 100%
11% of limit ↓ 59% below
Sulfate 599 1965–2025 100%
2% of limit ↓ 92% below
Arsenic 574 2002–2025 99%
5% of limit ↓ 62% below
Lead 574 2002–2025 99%
0% of limit ↓ 89% below
Radon 6 2002–2015 100%
6% of limit ↓ 78% below
Uranium 6 2002–2015 17%
0% of limit ↓ 82% below
Nitrate 21 1965–2022 71%
0% of limit ↓ 93% below
PFHxS municipal 72 2023–2025 42%
46% of limit ~ typical
Fluoride 77 1965–2025 97%
3% of limit ↓ 61% below
HFPO-DA (GenX) municipal 72 2023–2025 0%
— —
Nitrite 12 1987–2022 50%
2% of limit ↑ 81% above
PFNA municipal 72 2023–2025 0%
— —
Total Coliform 38 2015–2025 95%
— ~ typical
Hardness 26 1965–2015 100%
— ↑ 27% above
pH 619 1965–2025 100%
— ~ typical
PFBS municipal 72 2023–2025 54%
— ~ typical
Fecal Coliform 19 2017–2021 100%
— ~ typical
E. coli 19 2015–2025 90%
— ~ typical
Sodium 598 1965–2025 100%
— ↓ 51% below

Distribution shows the share of samples in each concentration band relative to the EPA Maximum Contaminant Level (MCL): Low = below half the MCL, Moderate = between half and the MCL, High = above the MCL. Analytes without an MCL (e.g. sodium, pH) show — in the limit columns. State average is based on county median values across FL.

Compare your result with Volusia County

Of the 574 arsenic tests on record for Volusia County (2002–2025), 1% found none, and half were below 0.5 µg/L.

Of the 641 chloride tests on record for Volusia County (1955–2025), 0% found none, and half were below 54.7 mg/L.

Of the 77 fluoride tests on record for Volusia County (1965–2025), 3% found none, and half were below 102 µg/L.

Of the 588 iron tests on record for Volusia County (1965–2025), 0% found none, and half were below 85.2 µg/L.

Of the 574 lead tests on record for Volusia County (2002–2025), 1% found none, and half were below 50 ng/L.

Of the 574 manganese tests on record for Volusia County (2002–2025), 0% found none, and half were below 5.44 µg/L.

Of the 21 nitrate tests on record for Volusia County (1965–2022), 29% found none, and half were below 20 µg/L.

Of the 599 sulfate tests on record for Volusia County (1965–2025), 0% found none, and half were below 5.08 mg/L.

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Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Iron 588 samples
  • Chloride 641 samples
  • Manganese 574 samples
  • Sulfate 599 samples
  • Arsenic 574 samples
  • Lead 574 samples
  • Nitrate 21 samples
  • Fluoride 77 samples
  • Total Coliform 38 samples
  • Hardness 26 samples
  • pH 619 samples
  • Fecal Coliform 19 samples
  • E. coli 19 samples
  • Sodium 598 samples

Limited data (<15 samples) — interpret with caution

  • Radon 6 samples
  • Uranium 6 samples
  • Nitrite 12 samples

No private-well PFAS data for Volusia County

We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Volusia County. PFAS has been detected in local public water systems (UCMR 5 data) — indicated by the "municipal" badge in the table above — but this does not directly indicate private well contamination. PFAS testing for private wells requires a dedicated lab panel (~$300–$500). If you are near a military base, airport, or industrial site, consider testing proactively. Learn more about PFAS →

Public vs. Private Water in Volusia County

135 Active public water systems
557,112 Residents on public water
14% Households on private wells

Public water systems in Volusia County are regulated by the EPA and must test and report contaminant levels. Private well owners are responsible for their own testing — there is no routine monitoring of private wells by any government agency.

CDC Health Outcome Correlations

Where contaminants detected in Volusia County have established associations with specific health outcomes, we cross-reference CDC PLACES county-level prevalence data. This is a contextual signal, not a causal claim.

Contaminant Associated Condition Volusia County Prevalence FL Average Source Year
Arsenic Cancer prevalence 8.3% 6.8% 2020
Arsenic Kidney disease rate 3.8% 3.4% 2020
Lead Heart disease rate 6.2% 7.7% 2020

Source: CDC PLACES county-level estimates. Raw data: Download Volusia County CDC PLACES data →

Data Sources

This report aggregates data from the following public databases:

Methodology

Raw records are downloaded from the Water Quality Portal and normalized to µg/L (ppb). Records are deduplicated by sample ID and date, and certified outliers are excluded. Analyte names are mapped to EPA canonical forms. Detection rates, distribution bands, and MCL comparisons are computed from the normalized dataset.

Distribution bands use the EPA Maximum Contaminant Level as the threshold: concentrations below 50% of the MCL are classed as Low, between 50% and 100% as Moderate, and above 100% as High. For analytes without an MCL (sodium, hardness, pH), distribution is not computed.

State comparison uses the median of county median values across all counties in FL with at least one sample for that analyte.

Last updated: 2026-08-12

Full methodology →