Data & Methodology — Broward County

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

Contaminant Data — All Analytes

16944 well testing events on record, covering 23 analytes. Data spans 1922 to 2021.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. FL Avg
Iron 844 1939–2024 97%
367% of limit ↑ 82% above
PFOS municipal 65 2023–2025 60%
472% of limit ↑ 124% above
PFOA municipal 65 2023–2025 58%
145% of limit ~ typical
Radon 41 1996–2016 100%
10% of limit ↓ 67% below
Chloride 16592 1916–2025 100%
31% of limit ↓ 36% below
Manganese 534 1959–2024 82%
40% of limit ↑ 51% above
Arsenic 366 1970–2024 89%
20% of limit ↑ 53% above
Sulfate 1285 1939–2025 98%
10% of limit ↓ 60% below
Lead 534 1970–2024 30%
0% of limit ↓ 90% below
Fluoride 1046 1941–2025 100%
8% of limit ~ typical
Nitrate 1157 1940–2020 78%
0% of limit ↓ 97% below
Nitrite 921 1970–2020 62%
1% of limit ~ typical
Uranium 58 1996–2020 78%
0% of limit ↓ 79% below
PFHxS municipal 65 2023–2025 48%
43% of limit ~ typical
HFPO-DA (GenX) municipal 65 2023–2025 0%
— —
PFNA municipal 65 2023–2025 0%
— —
PFBS municipal 65 2023–2025 60%
— ~ typical
Fecal Coliform 39 1974–2021 44%
— ~ typical
E. coli 48 2016–2025 60%
— ~ typical
pH 1162 1940–2025 100%
— ~ typical
Sodium 1068 1941–2025 100%
— ↓ 62% below
Total Coliform 87 1974–2025 54%
— ~ typical
Hardness 1071 1939–2020 100%
— ↑ 24% above

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 Broward County

Of the 366 arsenic tests on record for Broward County (1970–2024), 11% found none, and half were below 1 µg/L.

Of the 16592 chloride tests on record for Broward County (1916–2025), 0% found none, and half were below 78 mg/L.

Of the 1046 fluoride tests on record for Broward County (1941–2025), 0% found none, and half were below 300 µg/L.

Of the 844 iron tests on record for Broward County (1939–2024), 3% found none, and half were below 1.01 mg/L.

Of the 534 lead tests on record for Broward County (1970–2024), 70% found none.

Of the 534 manganese tests on record for Broward County (1959–2024), 18% found none, and half were below 20 µg/L.

Of the 1157 nitrate tests on record for Broward County (1940–2020), 22% found none.

Of the 1285 sulfate tests on record for Broward County (1939–2025), 2% found none, and half were below 25 mg/L.

Of the 58 uranium tests on record for Broward County (1996–2020), 22% found none, and half were below 47 ng/L.

Have a number from your lab? Enter it to see where it falls. Nothing is sent anywhere.

Want the full picture for your well? Check all your results.

Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Iron 844 samples
  • Radon 41 samples
  • Chloride 16592 samples
  • Manganese 534 samples
  • Arsenic 366 samples
  • Sulfate 1285 samples
  • Lead 534 samples
  • Fluoride 1046 samples
  • Nitrate 1157 samples
  • Nitrite 921 samples
  • Uranium 58 samples
  • Fecal Coliform 39 samples
  • E. coli 48 samples
  • pH 1162 samples
  • Sodium 1068 samples
  • Total Coliform 87 samples
  • Hardness 1071 samples

No private-well PFAS data for Broward County

We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Broward 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 Broward County

55 Active public water systems
1,915,270 Residents on public water
0% Households on private wells

Public water systems in Broward 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 Broward 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 Broward County Prevalence FL Average Source Year
Arsenic Cancer prevalence 5.4% 6.8% 2020
Arsenic Kidney disease rate 2.9% 3.4% 2020
Lead Heart disease rate 6.7% 7.7% 2020

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